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Clinical lumpy skin disease (LSD) predominantly affects cattle and, to lesser extent domestic water buffalos. Whilst earlier work focussed on the disease in Africa, the recent emergence of LSD virus (LSDV) as a major cause of disease in Asia has led to a widening range of susceptible hosts for the virus. This article lists the wild and domestic ungulates in which LSDV infection has been confirmed and considers the significance of the disease for these species in Asia. [ABSTRACT FROM AUTHOR]

Lumpy skin disease virus (LSDV) is an extremely infectious, viral, and chronic skin disease that is caused by the Capripox virus. This viral disease is predominantly found in cows. Mosquitoes and ticks are the primary transmitters for the spread of this virus. Recently, LSDV has been rapidly spreading all over the world, especially in several areas of Pakistan, India, and Iran. Thousands of cows have died due to this infectious virus in Pakistan and early detection of LSDV is needed to avoid further loss. The prediction and classification of LSDV are hindered by the lack of publicly available datasets. Despite a few studies using LSDV datasets, such datasets are often small, which may lead to model overfitting. In this regard, we collect the dataset from several online sources, as well as, collecting images from veterinary farms in different areas of Pakistan. Deep learning has been widely used in the medical field for disease detection and classification. Therefore, this study leverages DenseNet deep learning models for LSDV detection and classification. Experiments are performed using VGG-16, ResNet-50, MobileNet-V2, custom-designed convolutional neural network, and Inception-V3. The DenseNet architecture presents a Convolutional Block Attention Module (CBAM) and Spatial Attention (SA) for the prediction and classification of LSD. Results demonstrate that a 99.11% accuracy can be obtained on the augmented dataset while a 94.23% accuracy can be achieved with the original dataset for chicken pox, monkey pox, and LSDV. Comparison with state-of-the-art studies corroborates the superior performance of the proposed model. [ABSTRACT FROM AUTHOR]

One of the major factors hindering efficient livestock production is the presence of high-impact infectious animal diseases, such as foot and mouth disease (FMD), lumpy skin disease (LSD), and bovine ephemeral fever (BEF), which are notable viral infections affecting cattle in Egypt, leading to significant economic losses. FMD is caused by the foot and mouth disease virus (FMDV) of the genus Aphthovirus in the Picornaviridae family. LSD is caused by lumpy skin disease virus (LSDV) of Capripox genus within the Poxviridae family, subfamily Chordopoxvirinae. BEF is caused by bovine ephemeral fever virus (BEFV) of genus Ephemerovirus in the Rhabdoviridae family. FMD is a highly contagious viral infection of domestic and wild cloven-hooved animals and can spread through the wind. On the other hand, LSD and BEF are arthropod-borne viral diseases that mainly affect domestic cattle and water buffalo. Despite government vaccination efforts, these three viral diseases have become widespread in Egypt, with several reported epidemics. Egypt's importation of large numbers of animals from different countries, combined with unregulated animal movements through trading and borders between African countries and Egypt, facilitates the introduction of new FMDV serotypes and lineages not covered by the current vaccination plans. To establish an effective control program, countries need to assess the real epizootic situation of various infectious animal diseases to develop an efficient early warning system. This review provides information about FMD, LSD, and BEF, including their economic impacts, causative viruses, global burden, the situation in Egypt, and the challenges in controlling these diseases. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) poses a significant threat to animal welfare and leads to economic losses in affected countries. LSD outbreaks may also impact trade and regional relationships. South and Southeast Asia, with its dense livestock population and intricate trade networks, are susceptible to LSD outbreaks. Indonesia confirmed its first LSD cases in March 2022, leading to substantial livestock losses by August 2023. Australia, an important player in the global beef industry, faced trade disruptions due to LSD concerns raised by Indonesia and Malaysia, claims that were refuted by Australian authorities. The dispute highlights the need for good surveillance. EPIWATCH®, employing artificial intelligence, provides real‐time outbreak signals, and spatial analysis can identify LSD hotspots, leading to timely interventions. This study uses data collected by the EPIWATCH® open‐source disease surveillance system at the University of New South Wales in 2022 and 2023 and compares it for timeliness and completeness with data available on the World Animal Health Information System (WAHIS). We found more timely reports of LSD outbreaks in EPIWATCH® compared to WAHIS. In conclusion, open‐source surveillance tools like EPIWATCH® can provide timely alerts of disease emergence, such as LSD outbreaks in South and Southeast Asia, which can supplement formal reporting systems. [ABSTRACT FROM AUTHOR]

Simple Summary: Lumpy Skin Disease (LSD) is a highly contagious viral infection in cattle that poses a significant threat to agricultural economies, especially in countries like India. Early and accurate detection is vital to prevent widespread outbreaks and reduce economic losses. Our research leverages advancements in artificial intelligence (AI), specifically deep learning, to develop an automated system for detecting LSD in cattle. We utilized publicly available datasets containing images of healthy cattle, those affected by LSD, and, importantly, cattle with other skin diseases to ensure our model specifically identifies LSD rather than general illness signs. We evaluated over ten pretrained deep learning models, including VGG16 and MobileNetV2, using transfer learning techniques. Through detailed data preprocessing, augmentation, and balancing, we enhanced model performance and generalizability. We assessed the models using crucial medical diagnostics metrics like sensitivity and specificity to minimize false negatives and positives. VGG16 and MobileNetV2 stood out, achieving high accuracy along with excellent sensitivity and specificity, effectively detecting LSD without misclassifying other conditions. This study provides valuable insights into applying deep learning in veterinary diagnostics, contributing to developing reliable AI tools for early LSD detection, ultimately improving animal health management and safeguarding the agricultural economy. Lumpy Skin Disease (LSD) poses a significant threat to agricultural economies, particularly in livestock-dependent countries like India, due to its high transmission rate leading to severe morbidity and mortality among cattle. This underscores the urgent need for early and accurate detection to effectively manage and mitigate outbreaks. Leveraging advancements in computer vision and artificial intelligence, our research develops an automated system for LSD detection in cattle using deep learning techniques. We utilized two publicly available datasets comprising images of healthy cattle and those with LSD, including additional images of cattle affected by other diseases to enhance specificity and ensure the model detects LSD specifically rather than general illness signs. Our methodology involved preprocessing the images, applying data augmentation, and balancing the datasets to improve model generalizability. We evaluated over ten pretrained deep learning models—Xception, VGG16, VGG19, ResNet152V2, InceptionV3, MobileNetV2, DenseNet201, NASNetMobile, NASNetLarge, and EfficientNetV2S—using transfer learning. The models were rigorously trained and tested under diverse conditions, with performance assessed using metrics such as accuracy, sensitivity, specificity, precision, F1-score, and AUC-ROC. Notably, VGG16 and MobileNetV2 emerged as the most effective, achieving accuracies of 96.07% and 96.39%, sensitivities of 93.75% and 98.57%, and specificities of 97.14% and 94.59%, respectively. Our study critically highlights the strengths and limitations of each model, demonstrating that while high accuracy is achievable, sensitivity and specificity are crucial for clinical applicability. By meticulously detailing the performance characteristics and including images of cattle with other diseases, we ensured the robustness and reliability of the models. This comprehensive comparative analysis enriches our understanding of deep learning applications in veterinary diagnostics and makes a substantial contribution to the field of automated disease recognition in livestock farming. Our findings suggest that adopting such AI-driven diagnostic tools can enhance the early detection and control of LSD, ultimately benefiting animal health and the agricultural economy. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is one of the most economically significant viral diseases of cattle caused by the Lumpy Skin Disease Virus (LSDV), classified as a member of the genus Capripoxvirus and belongs to the family Poxviridae. Nodular skin samples were collected from clinically sick cattle in the districts of Amuru and Wara Jarso Ethiopia to isolate LSD virus. The virus was isolated using primary lamb testis and kidney cells. The isolated LSDV was infected into a healthy calf while maintaining the necessary biosecurity measures to generate skin lesions and to assess disease progression using postmortem examinations. On the fourth day after virus inoculation, the calf developed typical LSD skin nodules with increased rectal temperature, which lasted until the 12th day, when they began to decrease. Viral shedding was detected in nasal, oral, and conjunctival swabs from 6 to 14 days after infection using real-time PCR. Post-mortem tissue specimens tested positive for LSD virus using real-time PCR and virus isolation. This study showed that LSDV were responsible for the LSD outbreaks, and the appearance of typical skin nodules accompanied by fever (> 39.5 °C) defined the virus's virulent status. The experimental infection with the isolated infectious LSDV could serve as a platform for future vaccine evaluation study using an LSDV challenge model. [ABSTRACT FROM AUTHOR]

Simple Summary: The emergence of midge-borne diseases such as lumpy skin disease in Thailand highlights the necessity of understanding the seasonal abundance and spatial distribution of Culicoides biting midges. Population dynamics, species composition, and host preferences of Culicoides species were studied in Kanchanaburi, Thailand. Nine UV light traps were deployed to collect midges in nine animal sheds over the course of a year, revealing abundant species such as C. oxystoma Kieffer and C. peregrinus Kieffer, C. arakawae Arakawa, and C. imicola Kieffer. These species demonstrated preferences for different farm animals and peaked in trap captures from the late rainy season to early winter. Trap catches were positively influenced by relative humidity and temperature, while they exhibited a negative impact from wind speed. This study provides important data for disease management and prevention, emphasizing the impact of these vectors on both animal and human health. Overall, this research underscores the importance of ongoing studies into Culicoides behavior, ecology, and disease transmission potential to inform effective control strategies. Culicoides biting midges were collected using UV light traps from nine livestock farms in Kanchanaburi Province, Thailand. Collections were made one night per month from June 2020 to May 2021 to determine the seasonal changes and spatial distribution of the Culicoides assemblage. The influence of four environmental factors (temperature, rainfall, humidity, and wind speed), types of animals in each shed (cattle, pigs, and avians), and neighboring animals (those in the other sheds and their proximity) were assessed. A subsample of 130,670 out of a total of 224,153 specimens collected was identified and counted. The collections were predominantly female (76.9%), though males were also commonly collected (23.1%). The dominant species included C. peregrinus (97,098 individuals; 43.0%), C. oxystoma (55,579; 24.6%), C. arakawae (45,996; 20.4%), and C. imicola (15,703; 7.0%), while other species accounted for the remaining 9777 individuals (4.4%). Trap captures were strongly influenced by seasons and animal sheds. Cattle exhibited the greatest effect on the community, likely due to their large biomass. Humidity and temperature had a positive effect on trap captures, whereas wind speed exhibited a negative effect. Cattle positively influenced all major species, except for C. arakawae, which showed a positive association with avians. A "neighboring effect" was also observed. Additionally, the lowest dispersal ability of C. arakawae was suggested. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is a serious, transboundary disease that affects cattle all over the world and results in considerable productivity losses. Although Türkiye's first outbreak of LSD was reported in August 2013, there is very little information available about the outbreak's spatiotemporal distribution or severity. GIS-based data analysis provides crucial tools for describing the spatial epidemiology of the disease by assessing the spatial distribution of LSD across time. This study used information on outbreaks reported to the the World Animal Health Organization (WOAH-OIE) between 2013 and 2021 to conduct a retrospective study on the epidemiology of LSD in Türkiye. Differences in the number of reported outbreaks and cases across different regions, provinces, months, and years were evaluated and descriptive statistics were calculated. In addition, spatial statistical tests (Local Moran's I and Getis-Ord Gi*) and Geographical Information Systems (GIS) were used to assess LSD outbreaks that had taken place at the province level in Türkiye. Possible epidemiological clusters of LSD were identified. A total of 1787 outbreaks and 10109 cases of LSD were reported from 75 out of 81 provinces of Türkiye during the course of the nine-year period. Hotspots for the circulation of LSD were identified in the Aegean, Southeastern and Eastern regions using spatial cluster analyses and it was observed that the spatial autocorrelation of LSD cases is positive across the country. The findings from this study, it may help us comprehend the disease's spatial character and offer authorities the beneficial information for surveillance efforts. [ABSTRACT FROM AUTHOR]

India is facing a new wave of Lumpy skin disease outbreaks since May 2022, spreading in more than 22 states and causing morbidity to more than 29 lakh animals and mortality to more than 2 lakh animals. Lack of specific antiviral treatment restores symptomatic therapeutic interventions. However, in the advent of large no. of cases and severity of disease, investigations on specific antiviral drugs are imperative. This scientific study was conducted on a group of LSD-affected cattle (n = 40) from the trans-Himalayan region of Kashmir (Jammu and Kashmir). The affected cattle were subjected to different treatments, including acyclovir (n = 27), symptomatic treatment (n = 7), and ivermectin (n = 6), along with supportive drugs. The animals were carefully monitored and compared both within and between groups at various intervals (0-96 hr) using a two-way analysis of variance (ANOVA). Significant (P = 0.05) improvement in regaining rectal temperature, respiration rate, and heart rate was noted 48 hours after treatment in a group of LSD-affected animals (n = 27) treated with acyclovir at a dose rate of 1 mg/kg body weight (small cattle) to 1.5 mg/kg (large cattle) intravenously in 500 ml normal saline along with supportive drugs including enrofloxacin (2.5 mg/kg), combination of meloxicam (0.25 mg/kg) and paracetamol (7.5 mg/kg) and pheniramine maleate (0.5 mg/kg) all intramuscularly, compared to group of LSD affected cattle (n = 6) treated with ivermectin (0.2 mg/kg subcutaneously) and supportive drugs and another group of LSD affected cattle (n = 7) treated symptomatically with only supportive drugs. Acyclovir treated group showed a significant (P = 0.05) decrease in total leucocyte count, lymphocyte, and basophil count from 0 hour to 96 hour of treatment (23.00 ± 0.534 to 5.59 ± 0.208; 13.97 ± 0.310 to 3.43 ± 0.126; 0.11 ± 0.003 to 0.03 ± 0.001 respectively). Significant (P = 0.05) decrease in total oxidative status (TOS: 73.31%) and increase in total antioxidant status (TAS: 59.9%) was observed in acyclovir treated group followed by ivermectin treated group (TOS: 68.05% and TAS: 27.16%) compared to symptomatically treated group (TOS: 42.41% and TAS: 18.75%). Acyclovir being comparatively more specific antiviral agent than ivermectin may have helped in amelioration of clinical severity and regaining of normal physiological, hematological, and oxidative indices in LSDaffected animals. The current study demonstrates expedited recovery, diminished clinical severity, and re-establishment of physiological, hematological and oxidative markers in animals subjected to acyclovir treatment, followed by animals administered with ivermectin, when compared to animals receiving symptomatic treatment. However, further studies are required to investigate safety or adverse effects, if any. [ABSTRACT FROM AUTHOR]

Culicoides are responsible for a number of diseases transmitted to the animals causing severe health conditions and great economic losses. The outbreak of bluetongue virus in Albania in 2014 and lumpy skin disease in 2016 strongly indicated the establishment of a sentinel herd surveillance in the country ruminant farms. Considering all evidence for Albania, investigation of species composition and abundance of Culicoides on livestock farms was performed in 10 sentinel sites. Ultraviolet-light traps (OVI-traps) were placed in selected sites for collection of Culicoides starting from April 15 to July 30, 2021. A total of 37,111 Culicoides midges from 18 different species were collected during the investigation. The most abundant species identified were C. newsteadi and C. obsoletus. Moreover, three species were described for the first time in Albania (C. collessi, C. chiopterus and C. immaculatus). Presence and abundance of the collected Culicoides spp. are associated with potential outbreak of diseases (i.e. bluetongue, ephemeral fever) linked with their transmission from Culicoides. [ABSTRACT FROM AUTHOR]

This study describes the first outbreak of Lumpy Skin Disease (LSD) in cattle in the Bengkalis region, Indonesia, and vaccination to control the epidemic. Data on the outbreak and vaccination was obtained from the local veterinary authority of the Bengkalis region, Indonesia. Climatological data was provided by the Meteorological, Climatological, and Geophysical Agency of Riau Province. Over the 5.5 months, the outbreak caused 10.4% (94/906) morbidity and 0.6% (6/906) mortality of cattle on infected farms. Temporally, three epidemic waves occurred during the outbreak period. Villages with cattle populations of > 150 animals (n = 36) were 5.3 times more likely to be infected with LSD compared to villages with smaller cattle populations (n = 107) (CI: 2.56–10.90, P < 0.01). The vaccination campaign covered 43.8% of cattle in villages within a 10 km radius of the cases. However, vaccination in villages with larger cattle populations (n = 29) was 0.63 less likely to cover 50% of the cattle populations compared to villages with smaller cattle populations (n = 41) (CI: 0.39–1.02, P = 0.05). By the time the first two and the major waves ceased, vaccination had covered only 0.0% (n = 6036), 27.8% (n = 6,036) and 9.7% (n = 5,697) of the cattle in the 10 km radius of the respective spatial clusters. The outbreak was statistically associated with rainfall and its interaction with temperature (F(2, 13) = 5.822, R2 = 0.47, P = 0.016). This study indicates that the LSD outbreak had low morbidity and mortality. Despite the low vaccination rate, the outbreak ceased, possibly due to plummeting of the abundance of insect vectors. [ABSTRACT FROM AUTHOR]

Since 2019, Lumpy skin disease (LSD) has suddenly spread in many Asian countries, including India. LSD primarily occurs in cattle. However, recent LSD outbreaks in India have also revealed significant morbidity and production losses in buffaloes. This has raised concerns about the role of buffaloes in the epidemiology and transmission of LSD and necessitates the inclusion of buffaloes in the mass vaccination program for the prevention and control of the disease in the country. However, there is no significant data on the immune response in buffaloes following vaccination with the LSD vaccine. In this study, we evaluated antibody- and cell-mediated immune responses following vaccination with a newly developed live-attenuated LSD vaccine (Lumpi-ProVacInd). The detectable amount of anti-LSDV antibodies was observed at 1–2 months following vaccination, with a peak antibody titer at 3 months. Upon stimulation of the peripheral blood mononuclear cells (PBMCs) with the UV-inactivated LSDV antigen, there was a significant increase in CD8 + T cell counts in vaccinated animals as compared to the unvaccinated animals. Besides, vaccinated animals also showed a significant increase in IFN-γ levels upon antigenic stimulation of their PBMCs with LSDV antigen. In conclusion, the buffaloes also mount a potent antibody- and cell-mediated immune response following vaccination with Lumpi-ProVacInd. [ABSTRACT FROM AUTHOR]

India is facing a new wave of Lumpy skin disease outbreaks since May 2022, spreading in more than 22 states and causing morbidity to more than 29 lakh animals and mortality to more than 2 lakh animals. Lack of specific antiviral treatment restores symptomatic therapeutic interventions. However, in the advent of large no. of cases and severity of disease, investigations on specific antiviral drugs are imperative. This scientific study was conducted on a group of LSD-affected cattle (n = 40) from the trans-Himalayan region of Kashmir (Jammu and Kashmir). The affected cattle were subjected to different treatments, including acyclovir (n = 27), symptomatic treatment (n = 7), and ivermectin (n = 6), along with supportive drugs. The animals were carefully monitored and compared both within and between groups at various intervals (0-96 hr) using a two-way analysis of variance (ANOVA). Significant (P ≤ 0.05) improvement in regaining rectal temperature, respiration rate, and heart rate was noted 48 hours after treatment in a group of LSD-affected animals (n = 27) treated with acyclovir at a dose rate of 1 mg/kg body weight (small cattle) to 1.5 mg/kg (large cattle) intravenously in 500 ml normal saline along with supportive drugs including enrofloxacin (2.5 mg/kg), combination of meloxicam (0.25 mg/kg) and paracetamol (7.5 mg/kg) and pheniramine maleate (0.5 mg/kg) all intramuscularly, compared to group of LSD affected cattle (n = 6) treated with ivermectin (0.2 mg/kg subcutaneously) and supportive drugs and another group of LSD affected cattle (n = 7) treated symptomatically with only supportive drugs. Acyclovir treated group showed a significant (P ≤ 0.05) decrease in total leucocyte count, lymphocyte, and basophil count from 0 hour to 96 hour of treatment (23.00 ± 0.534 to 5.59 ± 0.208; 13.97 ± 0.310 to 3.43 ± 0.126; 0.11 ± 0.003 to 0.03 ± 0.001 respectively). Significant (P ≤ 0.05) decrease in total oxidative status (TOS: 73.31%) and increase in total antioxidant status (TAS: 59.9%) was observed in acyclovir treated group followed by ivermectin treated group (TOS: 68.05% and TAS: 27.16%) compared to symptomatically treated group (TOS: 42.41% and TAS: 18.75%). Acyclovir being comparatively more specific antiviral agent than ivermectin may have helped in amelioration of clinical severity and regaining of normal physiological, hematological, and oxidative indices in LSD-affected animals. The current study demonstrates expedited recovery, diminished clinical severity, and re-establishment of physiological, hematological and oxidative markers in animals subjected to acyclovir treatment, followed by animals administered with ivermectin, when compared to animals receiving symptomatic treatment. However, further studies are required to investigate safety or adverse effects, if any.

Abstract Lumpy skin disease (LSD) is one of the most economically significant viral diseases of cattle caused by the Lumpy Skin Disease Virus (LSDV), classified as a member of the genus Capripoxvirus and belongs to the family Poxviridae. Nodular skin samples were collected from clinically sick cattle in the districts of Amuru and Wara Jarso Ethiopia to isolate LSD virus. The virus was isolated using primary lamb testis and kidney cells. The isolated LSDV was infected into a healthy calf while maintaining the necessary biosecurity measures to generate skin lesions and to assess disease progression using postmortem examinations. On the fourth day after virus inoculation, the calf developed typical LSD skin nodules with increased rectal temperature, which lasted until the 12th day, when they began to decrease. Viral shedding was detected in nasal, oral, and conjunctival swabs from 6 to 14 days after infection using real-time PCR. Post-mortem tissue specimens tested positive for LSD virus using real-time PCR and virus isolation. This study showed that LSDV were responsible for the LSD outbreaks, and the appearance of typical skin nodules accompanied by fever (> 39.5 °C) defined the virus’s virulent status. The experimental infection with the isolated infectious LSDV could serve as a platform for future vaccine evaluation study using an LSDV challenge model.

Lumpy skin disease (LSD) is an economically significant, emerging viral disease of Cattle and Buffaloes. This study aimed to investigate the causes of high mortality in a recent LSD epidemic in India. We examined 1618 animals across seventy outbreaks and conducted post-mortem on 48 cattle out of 513 clinically suspected LSD cases. The morbidity, mortality and case fatality rates recorded were 31.70%, 2.97 and 9.37% respectively. Disease stages were categorized as early (20.81%), mid (42.02%), and late (37.17%) and the distribution of skin lesions was classified as mild (34.14%), moderate (39.39%), and severe (26.47%). Post-mortem findings revealed systemic infection with necrotic and ulcerative nodules on multiple internal organs. Histologically, necrotizing vasculitis and mononuclear cell infiltration with intracytoplasmic inclusions were observed in various organs. The highest viral load was found in skin nodules/scabs, trachea, tongue, and lymph nodes. The viral load was significantly higher in mid- and late-stages of skin nodules and internal organs; whereas, blood from early-stage showed high viral load. The expression of Th1-type and Th2-type cytokines varied significantly across different stages of the disease. The downregulation of the apoptotic intrinsic and upregulation of the extrinsic pathway genes, suggesting that the latter plays a role in LSDV infection. Genetic analysis revealed that the LSD virus (LSDV) isolates were derived from a Kenyan ancestral strain with unique nucleotide changes in RPO30 and P32 gene. In conclusion, the high mortality in the recent Indian LSD epidemic can be attributed to a newly identified, highly virulent strain of LSDV causing systemic infection.

Research to detect the presence of Lumpy Skin Disease Virus (LSDV) was carried out in the work area of the Banten Animal, Fish and Plant Quarantine Center (BBKHIT). Sampling for LSDV detection was taken from cattle that were being transported both in and out of Merak Port. The aim of this research is to detect the presence of LSDV both clinically and in laboratory examinations at Merak Port and estimate the impact of its spread. 152 mouth and nose swab samples were taken, then a quantitative real time PCR (qPCR) test was carried out. The results of the study showed that there were no clinical symptoms observed in the trafficked cattle, however there were 2 positive samples for LSD by molecular testing using qPCR. These results can be said to be subclinically infected cattle. Positive samples came from cattle trafficked from Sumbawa Regency and Central Lampung Regency with respective Ct values of 27.71 and 28.88. Estimates of the impact of the spread of LSDV were carried out based on the categories of breeding cattle and beef cattle. The impact of the spread of LSDV is estimated to be more dangerous and will occur in breeding cattle because of their long lifespan during the rearing process. This means that the LSD virus can continue to spread to other cows rather than cows that are immediately slaughtered.

Background: In 2021, Vietnam experienced an outbreak of Lumpy skin disease (LSD), which infected 207,687 cattle and buffaloes, as officially reported, and resulted in the culling of 29,182 animals. Aim: In this study, samples from cattle that died and showed typical signs of LSD in the Ha Tinh province of Vietnam were confirmed by three WOAH-recommended methods and further studied to compare the Vietnam and China reference strains to the new clinical cases. Methods: Three methods recommended by WOAH for agent detection (PCR, virus isolation, and transmission electron microscopy) were used to confirm this clinical LSD case. The sequence analysis of three well-known markers (P32, RPO30, and GPCR genes) has been utilised in Vietnam to understand this circulating pathogen better. Results: Our findings showed that the CX01 LSDV strain is 100% identical to the Vietnam reference strain HL01 and China reference strains based on P32 and RPO30 genes. Interestingly, analysis of the nucleotide sequence of the GPCR gene showed that the CX01 strain belongs to the same cluster as the reference strains, but it has branches different from those of both the HL01 and China LSDV strains. The nucleotide identification between the CX01 strain and these reference virus strains ranked 99.65 – 99.91%, suggesting that it is a new variant of LSDV. Conclusion: This finding is new and indicates that at least two variants of the LSD virus were circulating in Vietnam based on analysis of the GPCR gene. Additionally, these results suggest that the sequence analysis of the GPCR gene is a great tool for subgrouping LSDV circulating in Vietnam. [Open Vet J 2024; 14(7.000): 1701-1707]

Abstract Lumpy skin disease (LSD) is a highly contagious disease caused by lumpy skin disease virus (LSDV) in bovines. Rapid and accurate diagnosis is very important to controll it. However, current commercial detection kits need to be improved in terms of sensitivity or specificity. This study aimed to develop a novel diagnostic competitive enzyme-linked immunosorbent assay (cELISA) based on the newly identified antigen gene LSDV034. The rLSDV034 protein was identified as a potential diagnostic antigen, and it was expressed, purified, and used to immunize BALB/c mice. Using laboratory-prepared indirect ELISA (iELISA), the positive cell lines were screened, and their blocking activity was further verified by competitive ELISA (cELISA). The cell line, 1H7, was chosen to produce mouse ascites, which were purified for a monoclonal antibody (mAb, 5.395 mg/mL). The heavy chain type of the 1H7 mAb was identified as IgG1a, and its light chain subtype was identified as κ. Furthermore, cELISA was developed to detect bovine serum antibodies, with rLSDV034 (4 μg/mL) as the coating antigen and HRP-1H7 mAb (1:300) as the competitive antibody. The cutoff value of cELISA was 55%, based on 32 negative bovine serum samples. The analytical sensitivity was 1:8, and no cross-reaction was detected with bovine viral diarrhea virus (BVDV), infectious bovine rhinotracheitis virus (IBRV), Pasteurella multocida (P. multocida), or Mycoplasma bovis (M. bovis) from the serum samples. The diagnostic sensitivity and specificity of cELISA were 98.46% (95% confidence interval, CI: 91.7–100) and 100% (95% CI: 89.1–100), respectively, based on the analysis of 30 LSDV-infected bovine serum samples, 35 GTPV-vaccinated samples, and 32 negative samples. The overall coincidence of the cELISA with the virus neutralization test (VNT) reached 98.97% (95% CI: 94.4–100). Furthermore, we used cELISA to analyze 230 clinical bovine serum samples (including 59 infected and 171 vaccinated samples) and found that the serum positivity rates of the immunized samples (on d 60 postimmunization) and infected samples were 77.78% (95% CI: 70.8–83.8%) and 71.19% (95% CI: 57.9–82.2), respectively. These results indicate that the developed cELISA is promising for detecting serum antibodies in naturally infected or vaccinated cattle.

Abstract The study aimed to investigate molecularly the presence of flea-borne viruses in infested small ruminants with fleas. It was carried out in Egypt’s Northern West Coast (NWC) and South Sinai Governorate (SSG). Three specific primers were used targeting genes, ORF103 (for Capripoxvirus and Lumpy skin disease virus), NS3 (for Bluetongue virus), and Rdrp (for Coronavirus), followed by gene sequencing and phylogenetic analyses. The results revealed that 78.94% of sheep and 65.63% of goats were infested in the NWC area, whereas 49.76% of sheep and 77.8% of goats were infested in the SSG region. Sheep were preferable hosts for flea infestations (58.9%) to goats (41.1%) in the two studied areas. Sex and age of the animals had no effects on the infestation rate (p > 0.05). The season and site of infestation on animals were significantly different between the two areas (p

Lumpy skin disease (LSD) is one of the most important diseases causing great economic losses in live animals stock industry of affected countries. It is an infectious vector borne viral illness considered one of major trans-boundary animal diseases affecting cattle and Asian domestic buffaloes (Bubalus bubalis). The aim of the current review is to clarify the current status of LSD epidemiology and to throw light on the methods of LSD diagnosis, prevention, treatment and control. LSD is rarely fatal, characterised by nodules on the entire skin of the affected animals, and has a high morbidity rate. The disease has severe direct adverse effects on cattle production, milk yields and animal body condition from damage of hides, abortions, infertility and other indirect effects resulted from restriction of ani-mal movements and trade. The first recorded outbreak was in Zambia in 1929. It is considered an endemic disease in African continent. First report of LSD in Egypt was in Suez Canal governorate in 1988. Diagnosis of LSD virus depends on the highly characteristic clinical signs in severely infected cases. In mild cases the diagnosis depends on the detection and isolation of the virus on different cell lines and on chorio-allantoic membranes of embryonated chicken eggs. Viral nucleic acid detection by molecular techniques as real time PCR is considered the test of priority because it is rapid, sensi-tive and quantitative. Prevention of the disease depends mainly on vaccination programmes for the entire cattle and buffalo populations, restriction of animals’ movement inside the country and through country borders, controlling insect vectors, in addition to symptomatic treatment of infected animals.

Goatpoxvirus (GTPV), sheeppoxvius (SPPV), and the Lumpy skin disease virus (LSDV) is a Capripoxvirus belonging to the family poxviridae. They can cause significant economic losses in countries where this disease are endemic. However, effective and convenient diagnostic tools against sera antibody are not readily available until now. Toward this goal, a polyclonal antibody competitive enzyme-linked immunosorbent assay (c-ELISA) of detecting serogroup-specific antibody is established based on major LSDV antigen A33. Serum samples (n = 605) were collected to optimize the c-ELISA from different areas. The cut-off value for the c-ELISA was estimate using percent inhibition (PI) values. The diagnostic performance of test including sensitivity (sn) and specificity (sp) were obtained by receiver operator characteristic (ROC) analysis. Among these analysis, > 57.61% PI value was accepted as cut-off of the c-ELISA, the diagnostic sn an diagnostic sp were reached to 96.4% and 98.5%, at > 95% confidence interval. These results show that the developed competitive ELISA is sensitive, specific, and reliable, which make it appropriate for serological investigation. [ABSTRACT FROM AUTHOR]

The article focuses on discrepancies in the genome sequences and analysis of the Eastern grey kangaroo poxvirus strain New South Wales (EKPV-NSW) as reported by Sarker et al. It identifies errors in sequence alignment, nucleotide composition, recombination predictions, and gene annotations, suggesting that assembly mistakes and analytical errors led to incorrect conclusions about the genetic differences between EKPV-NSW and other kangaroopox virus strains.

Lumpy skin disease (LSD) is a critical problem for cattle populations, affecting both individual cows and the entire herd. Given cattle's critical role in meeting human needs, effective management of this disease is essential to prevent significant losses. The study proposes a deep learning approach using the MobileNetV2 model and the RMSprop optimizer to address this challenge. Tests on a dataset of healthy and lumpy cattle images show an impressive accuracy of 95%, outperforming existing benchmarks by 4–10%. These results underline the potential of the proposed methodology to revolutionize the diagnosis and management of skin diseases in cattle farming. Researchers and graduate students are the audience for our paper. [ABSTRACT FROM AUTHOR]

Background: Lumpy skin disease (LSD) is caused by a virus belonging to the genus Capripoxvirus, exhibiting clinical symptoms ranging from mild signs to the development of nodules. LSD emerged in Asia and Southeast Asia, including Vietnam, in October 2020 and has since spread throughout the region, resulting in productivity and economic losses. Aim: This study aimed to investigate the virus-causing papular dermatitis in cattle from the Mekong Delta region of Vietnam by analyzing its GPCR gene and assessing its evolutionary relationship with sequences in the GenBank database. Methods: Blood samples (n = 180) were collected from cattle farms in Ben Tre, Tien Giang, and Tra Vinh provinces. PCR targeting the P32 antigen gene was utilized to detect LSDV presence, and GPCR gene amplification was performed to assess genetic variability. Results: LSDV was detected in 8.33% (15/180) of the samples using PCR targeting the P32 antigen gene. Each sample that tested positive for LSDV demonstrated complete amplification of the GPCR gene. Sequence alignments and phylogenetic analyses of the GPCR gene revealed that Mekong Delta LSDV isolates shared genetic similarities and possessed a 12-nucleotide insertion comparable to strains from China in 2019 and Northern Vietnam in 2020. Conclusion: This study provides preliminary insights into the molecular characteristics of LSDV in cattle from the Mekong Delta region of Vietnam. The observed genetic relatedness to other LSDV sequences from Asia and Southeast Asia underscores the importance of regional surveillance and control measures. These findings contribute to the development of effective strategies for LSDV control and prevention. [ABSTRACT FROM AUTHOR]

Lumpy skin disease virus (LSDV), a double‐stranded DNA virus from the Capripoxvirus genus, primarily affects Bos indicus, Bos taurus breeds, and water buffalo. Arthropod vectors, including mosquitoes and biting flies, are the main LSDV transmitters. Although LSDV is not zoonotic, this study unexpectedly detected LSDV reads in the upper respiratory tract microbiome of humans from rural and urban areas in Maharashtra, India. Nasopharyngeal and oropharyngeal swab samples collected for SARS‐CoV‐2 surveillance underwent whole‐genome metagenomics sequencing, revealing LSDV reads in 25% of samples. Split kmer analysis provided insights into sample relatedness despite the low coverage of LSDV reads with the reference genome. Our findings, which include the detection of LSDV contigs aligning to specific locations on the reference genome, suggest a common source for LSDV reads, potentially shared water sources, or milk/milk products. Further investigation is needed to ascertain the mode of transmission and reason for the detection of LSDV reads in human upper respiratory tract. [ABSTRACT FROM AUTHOR]

This paper was to present a mathematical model of non-integer order and demonstrated the detrimental consequences of lumpy skin disease (LSD). The LSD model included primarily affected cattle and other animals, particularly buffalo and cows. Given the significant drop in the number of livestock and dairy products, it was essential to use mathematical models to raise awareness of this issue. We examined the suggested LSD model to understand as well as every possible avenue that could result in the illness spreading throughout the community. Ulam-Hyers stability made it easier to analyze the stability of the LSD model, and fixed-point theory was a valuable tool for finding the existence and uniqueness of the solution to the suggested model. We have used new versions of power law and exponential decay fractional numerical methods. Numerical calculations were showing the influence of various fractional orders on the spread of disease and provided more informations than integer orders for the sensitive parameters of the proposed model. The graphical depiction is showed an understanding of the proposed LSD model. [ABSTRACT FROM AUTHOR]

To implement effective lumpy skin disease (LSD) control measures, such as timely vaccination, particularly in calves and serological monitoring, it is necessary to evaluate immune response after vaccination, both in adult cattle and in their calves. The aim of this study was to evaluate passive immunity transfer and duration of maternal antibodies against lumpy skin disease virus (LSDV) in calves born to vaccinated cows by two different serological methods. The longitudinal study was carried out on two farms in Serbia where no cases were reported during LSD outbreak in 2016. Fifteen cows on each farm were vaccinated and revaccinated with attenuated vaccine - Neethling strain. A total of 30 cows and 30 calves on both farms were included in the study. Serum samples from cows were collected on calving day and serum samples from their respective calves on days 10, 20, 30, 45, 60, 75, 90, 105 and 120 after birth. Colostrum samples were collected only from 15 cows on one farm. In order to determine the presence of antibodies against LSDV a total of 30 cow sera samples, 15 colostrum samples and 270 calf sera samples were examined by commercial enzyme-linked immunosorbent assay (ELISA) and modified virus neutralization test (VNT). Overall, the performance of both serological tests was very satisfactory. The results of this longitudinal study showed that persistence of passive immunity in calves is less than 4 months, and that most calves are not protected against LSDV at that age. Since the vaccination is the most important control measure against LSDV, the recommended age of six months for vaccination of calves born to vaccinated cows should be reassessed to achieve the most optimal protection against LSD. [ABSTRACT FROM AUTHOR]

The emergence of lumpy skin disease (LSD) among cattle in India is concerning. District-level data on LSD cases in Uttar Pradesh between 2021 and 2022 were analyzed. A stepwise spatial analytical approach was followed by first constructing yearly and monthly disease maps for LSD incidence rates (IRs), then spatially interpolating the LSD IRs, followed by evaluating the global and local clustering of LSD IRs and finally conducting spatial regression modeling. Overall, 5784 LSD cases from 6 districts and 112,226 cases from 33 districts were detected in 2021 and 2022, respectively. In the incremental spatial autocorrelation analysis, the highest global clustering of LSD IRs for the 2022 outbreak was detected at 196.49 km. For the 2021 LSD outbreak, one district with high-low and nine districts with low-high LSD IRs were identified in the eastern region of the state. For the 2022 LSD outbreak, 13 districts with high-high and 7 districts with low-high LSD IRs were identified in the western part of the state. A geographically weighted regression model identified the impact of climate (temperature and humidity) and land cover (pasture, fallow, and non-agricultural land) on LSD IRs. The study results can aid animal health authorities in developing LSD prevention and control programs. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is an economically important and notifiable transboundary viral disease of cattle and water buffalo, predominantly transmitted by arthropod vectors. In recent times, LSD has emerged as a notable concern in Nepal, with the first outbreak reported in June 2020, in Morang district. In 2022, outbreaks of LSD were observed in several districts with Nawalpur district being the hard‐hit district. The objective of this study is to provide insights into the epidemiological characteristics of LSD, to identify potential sources and associated risk factors for LSD outbreak in Nawalpur, and its financial impact. The overall morbidity rate was observed to be 28.02% (n = 431/1,538) and the mortality rate was 3.06% (n = 47/1,538), resulting in a case fatality rate of 10.90% (n = 47/431). The predominant clinical symptoms were skin nodules, lameness, and decreased milk production in milking animals. Dry cattle, including pregnant cows and cattle heifers were the most affected. Univariable logistic regression analysis identified factors linked to disease outbreaks, such as importing animals from disease prevalent regions, sharing feed and water, herd size, and the presence of clinical signs in neighboring farms. Multivariable analysis highlighted the significance of neighboring farms having sick animals in resulting disease outbreaks. Because of the substantial economic impact due to LSD, it is imperative to implement effective control and preventive measures. These include animal movement control and quarantine, following biosecurity protocols during nearby outbreaks, and targeted vaccination of susceptible populations to prevent further disease spread. [ABSTRACT FROM AUTHOR]

Livestock production in the Greater Mekong Subregion (GMS) reflects the inefficient smallholder 'keeper' system that has been slow to adapt to the rapidly expanding demand for animal protein-sourced foods in the region as urban economies have flourished and food preferences altered. The prolonged surge in demand, with only modest increases in local production, has increased the movement of animals and products into and from the GMS, accompanied by surging risks of transboundary animal disease (TAD) incursions, including the one health (OH) threats of zoonoses and antimicrobial resistance. As a consequence, the region has been subjected to epidemics of highly pathogenic avian influenza (HPAI), new strains of foot-and-mouth disease (FMD) virus, with recent incursions of African swine fever (ASF), lumpy skin disease (LSD), porcine reproductive and respiratory syndrome (PRRS) and risks of peste petits ruminants (OPR) occurring in Southeast Asia (SEA) and beyond. These incidents reflect inadequate biosecurity, a sustainability issue that was clearly of relevance in the covid-19 pandemic, reflecting ecosystem health (EH) deficits, including land-use issues and unregulated trading in wildlife-sourced and poorly processed foods through the predominant 'wet markets'. These challenges are increasingly confounded by slow adaption to the impacts of the climate crisis, including flooding, drought, crop failures and hypothermia episodes. The increase in animal and product movements enhances disease transmission risk, yet coincides with emerging concerns of greenhouse-gas emissions (GHGe) from livestock production, especially from large ruminants, as the world attempts to find pathways in managing the climate crisis. Despite the prolonged collaborative efforts of the SEA China FMD program from 1997 to 2023, a recent review confirmed persistent deficits in biosecurity, vaccine resourcing, disease surveillance, engagement of farmers, and national emergency disease-response capacities. A major project is about to fund major improvements in livestock value chains in Cambodia, including more effective biosecurity, surveillance and emergency disease-response capacities for TADs, antimicrobial resistance (AMR) and zoonoses. Similarly, a private-sector investment in Laos has developed a more climate-resilient livestock-feeding system that decreases GHGe impacts from ruminant production. These developments are likely to extend beyond both countries and be potentially transformational for the livelihoods of many of the poorest citizens in the region. Increased movement of livestock and products in the Greater Mekong Subregion (GMS) has enhanced disease transmission risk, increasing transboundary animal-disease (TAD) incursions and one health (OH) concerns. This has coincided with increasing awareness of greenhouse-gas emissions (GHGe) from livestock, especially contributions to ecosystem health (EH) concerns from large ruminants. Projects addressing biosecurity, vaccines, disease surveillance, feeding systems and national emergency disease-response capacities are required, and private-sector investments developing climate-resilient livestock systems to support the livelihoods of poor rural communities in the GMS should be encouraged. This article belongs to the Collection Sustainable Animal Agriculture for Developing Countries 2023. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is a highly contagious disease caused by lumpy skin disease virus (LSDV) in bovines. Rapid and accurate diagnosis is very important to controll it. However, current commercial detection kits need to be improved in terms of sensitivity or specificity. This study aimed to develop a novel diagnostic competitive enzyme-linked immunosorbent assay (cELISA) based on the newly identified antigen gene LSDV034. The rLSDV034 protein was identified as a potential diagnostic antigen, and it was expressed, purified, and used to immunize BALB/c mice. Using laboratory-prepared indirect ELISA (iELISA), the positive cell lines were screened, and their blocking activity was further verified by competitive ELISA (cELISA). The cell line, 1H7, was chosen to produce mouse ascites, which were purified for a monoclonal antibody (mAb, 5.395 mg/mL). The heavy chain type of the 1H7 mAb was identified as IgG1a, and its light chain subtype was identified as κ. Furthermore, cELISA was developed to detect bovine serum antibodies, with rLSDV034 (4 μg/mL) as the coating antigen and HRP-1H7 mAb (1:300) as the competitive antibody. The cutoff value of cELISA was 55%, based on 32 negative bovine serum samples. The analytical sensitivity was 1:8, and no cross-reaction was detected with bovine viral diarrhea virus (BVDV), infectious bovine rhinotracheitis virus (IBRV), Pasteurella multocida (P. multocida), or Mycoplasma bovis (M. bovis) from the serum samples. The diagnostic sensitivity and specificity of cELISA were 98.46% (95% confidence interval, CI: 91.7–100) and 100% (95% CI: 89.1–100), respectively, based on the analysis of 30 LSDV-infected bovine serum samples, 35 GTPV-vaccinated samples, and 32 negative samples. The overall coincidence of the cELISA with the virus neutralization test (VNT) reached 98.97% (95% CI: 94.4–100). Furthermore, we used cELISA to analyze 230 clinical bovine serum samples (including 59 infected and 171 vaccinated samples) and found that the serum positivity rates of the immunized samples (on d 60 postimmunization) and infected samples were 77.78% (95% CI: 70.8–83.8%) and 71.19% (95% CI: 57.9–82.2), respectively. These results indicate that the developed cELISA is promising for detecting serum antibodies in naturally infected or vaccinated cattle. [ABSTRACT FROM AUTHOR]

The study aimed to investigate molecularly the presence of flea-borne viruses in infested small ruminants with fleas. It was carried out in Egypt's Northern West Coast (NWC) and South Sinai Governorate (SSG). Three specific primers were used targeting genes, ORF103 (for Capripoxvirus and Lumpy skin disease virus), NS3 (for Bluetongue virus), and Rdrp (for Coronavirus), followed by gene sequencing and phylogenetic analyses. The results revealed that 78.94% of sheep and 65.63% of goats were infested in the NWC area, whereas 49.76% of sheep and 77.8% of goats were infested in the SSG region. Sheep were preferable hosts for flea infestations (58.9%) to goats (41.1%) in the two studied areas. Sex and age of the animals had no effects on the infestation rate (p > 0.05). The season and site of infestation on animals were significantly different between the two areas (p < 0.05). Ctenocephalides felis predominated in NWC and Ctenocephalides canis in SSG, and males of both flea species were more prevalent than females. Molecular analysis of flea DNA revealed the presence of Capripoxvirus in all tested samples, while other viral infections were absent. Gene sequencing identified three isolates as sheeppox viruses, and one as goatpox virus. The findings suggest that Capripoxvirus is adapted to fleas and may be transmitted to animals through infestation. This underscores the need for ongoing surveillance of other pathogens in different regions of Egypt. [ABSTRACT FROM AUTHOR]

This study investigates the in vitro and in vivo biological activities of mycogenic Zn nanoparticles synthesized by Aspergillus fumigatus (AFZN) as an effective neurological, antioxidant, antibacterial, antiviral, and anticancer agents besides mitigating the Al toxicity in albino mice. The spherical AFZN were 39nm in size and -23.6mV charge; these properties possessed the antioxidant, anticancer, antibacterial, antiviral, and anti-alzheimer activities. The in vitro findings revealed that AFZN (100 µg/mL) significantly inhibited 89% of DPPH radicals, 84% of the activity of AChE, and 85% of brain cancer cell lines besides pathogenic bacteria. The obtained ZnNPs reduced the severity of the lumpy skin disease virus (LSDV) by 84%. The antioxidant and neurological activity of ZnNPs in AlCl3-challenged mice were evaluated; therefore, 120 mice were allocated into six groups: control, three groups received ZnNPs concentrations (25, 50, and 75 mg/kg), AlCl3-challenged group, and AlCl3-challenged group and treated with ZnNPs (75 mg/kg). The dietary ZnNPs (75 mg/kg) significantly enhanced body weight gain, feed intake, and feed conversion ratio compared to the control and AlCl3-challenged group. The liver enzymes (AST and ALT), uric acid, total cholesterol, LDL, and MDA were at a high level in AlCl3-challenged groups, whereas ZnNPs (75 mg/kg) treatment enhanced the oxidative stability and immunity markers in the AlCl3-challenged group, where decreased MDA, and enhanced the activity of the enzymatic defence system (SOD, CAT, and GPx). Also, it downregulated the brain, liver, and renal proinflammatory (OCCU and MUC-1, IL-6, and IL-1β) and pro-cancerous (Bax and caspase-3) markers in the AlCl3-challenged group. The brain, liver, and kidney histology correlated with the results of biochemical parameters, where ZnNPs application recovered the tissue structure as control. It concluded that mycogenic ZnNPs can be used as an antioxidant and anti-alzheimer agent in the AlCl3-challenged group. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is a viral disease caused by lumpy skin disease virus (LSDV), which mainly infects cattle and can cause huge economic losses. In May 2023, yaks, cattle‐yaks, and cattle in Tibet (Xizang), China, developed fever, skin nodules, and severe discharges and were suspected to be cases of LSD. Samples from these animals were analyzed using molecular biology and serological methods. The RPO30, P32, and GPCR genes were amplified by PCR and sequenced, and the whole genome of the virus was determined using viral metagenomics technology. Sequencing results showed that it was indeed an LSDV infection, and enzyme‐linked immunosorbent assay results confirmed the presence of LSDV antibodies. The whole genome phylogenetic tree shows that LSDV/CHINA/Tibet/2023 is different from the previous epidemic strains in China, but clusters with India 2022 strain. This is the first report of LSD in yaks, cattle‐yaks, and cattle on the highest altitude plateau in the world. [ABSTRACT FROM AUTHOR]

Sheeppox virus (SPPV), goatpox virus (GTPV), and lumpy skin disease virus (LSDV) are the three members of the genus Capripoxvirus within the Poxviridae family and are the etiologic agents of sheeppox (SPP), goatpox (GTP), and lumpy skin disease (LSD), respectively. LSD, GTP, and SPP are endemic in Africa and Asia, causing severe disease outbreaks with significant economic losses in livestock. Incursions of SPP and LSD have occurred in Europe. Vaccination with live attenuated homologous and heterologous viruses are routinely implemented to control these diseases. Using the gold standard virus neutralization test, we studied the ability of homologous and heterologous sera to neutralize the SPPV and LSDV. We found that LSD and SPP sera effectively neutralize their homologous viruses, and GTP sera can neutralize SPPV. However, while LSD sera effectively neutralizes SPPV, SPP and GTP sera cannot neutralize the LSDV to the same extent. We discuss the implications of these observations in disease assay methodology and heterologous vaccine efficacy. [ABSTRACT FROM AUTHOR]

Capripoxviruses are the causative agents of sheeppox, goatpox, and lumpy skin disease (LSD) in cattle, which cause economic losses to the livestock industry in Africa and Asia. Capripoxviruses are currently controlled using several live attenuated vaccines. It was previously demonstrated that a lumpy skin disease virus (LSDV) field isolate from Warmbaths (WB) South Africa, ORF 005 (IL-10) gene-deleted virus (LSDV WB005KO), was able to protect sheep and goats against sheeppox and goatpox. Subsequently, genes encoding the protective antigens for peste des petits ruminants (PPR) and Rift Valley fever (RVF) viruses have been inserted in the LSDV WB005KO construct in three different antigen forms (native, secreted, and fusion). These three multivalent vaccine candidates were evaluated for protection against PPR using a single immunization of 104 TCID50 in sheep. The vaccine candidates with the native and secreted antigens protected sheep against PPR clinical disease and decreased viral shedding, as detected using real-time RT-PCR in oral and nasal swabs. An anamnestic antibody response, measured using PPR virus-neutralizing antibody response production, was observed in sheep following infection. The vaccine candidates with the antigens expressed in their native form were evaluated for protection against RVF using a single immunization with doses of 104 or 105 TCID50 in sheep and goats. Following RVF virus infection, sheep and goats were protected against clinical disease and no viremia was detected in serum compared to control animals, where viremia was detected one day following infection. Sheep and goats developed RVFV-neutralizing antibodies prior to infection, and the antibody responses increased following infection. These results demonstrate that an LSD virus-vectored vaccine candidate can be used in sheep and goats to protect against multiple viral infections. [ABSTRACT FROM AUTHOR]

Simple Summary: Lumpy skin disease (LSD) is a preventable disease in cattle. Understanding the epidemiology of the disease, as well as farmers' perceptions, is the most important key to designing a prevention strategy. Accordingly, the current study was designed to establish LSD seroprevalence using specific methods and to investigate LSD epidemiology in the Sidama regional state (Ethiopia), as well as to assess farmers' perceptions. The study determined high exposures to LSD at both herd and animal levels in three agro-ecological zones. Furthermore, the farmers' knowledge about LSD was low, and there were complaints of LSD disease reports even in vaccinated groups. As a conclusion, this study identified the distribution of LSD in different management systems as well as agro-ecological zones, followed by a low level of farmers' knowledge about the disease. Furthermore, this study indicates the necessity for community-based awareness campaigns regarding clinical signs of LSD along with regularly updated information on LSD prevalence. The lumpy skin disease (LSD) vaccination status and epidemiological distribution remain unknown in some parts of Ethiopia, including the Sidama regional state. In this study, a serological survey of LSD was performed using a specific virus neutralization assay in selected districts of the Sidama regional state representing three agroecological zones from September 2021 to June 2022. Moreover, an assessment of community awareness and LSD vaccine-related problems was conducted using a questionnaire. Our results showed an overall animal and herd level seroprevalence of 40.8% (95%CI = 35.8, 45.8) and 81% (95%CI = 77, 85), respectively. High and low seroprevalence were observed in lowland (48%) and highland (28%) areas, although they were not statistically significant. However, risk factors such as management systems and breeds showed substantial differences in their LSD prevalence. The results obtained through the questionnaire showed that a small portion of respondents (29.2%) know about LSD and vaccinate their cattle (23.3%) against this disease. Only 20.8% of the respondents stated that there was LSD occurrence in their vaccinated cattle. In conclusion, both qualitative and quantitative study results showed the need for intervention in terms of community-based awareness creation about LSD clinical signs and vaccination advantages together with the frequently updated information on LSD prevalence. [ABSTRACT FROM AUTHOR]

Background. Lumpy skin disease (LSD) is an economically important, transboundary viral disease of cattle caused by LSD virus. This systematic review and meta‐analysis are concerned with summarizing the status of lumpy skin disease in Africa. Methods. Literature searches between 2007 and 2023 were conducted using different database searches: Google, Google Scholar, PubMed, and Science Direct, and then the required information were extracted. A random effect model was used to pool estimates of prevalence at 95% CI. Publication bias was assessed by applying funnel plots. Results. The pooled estimated prevalence of LSD was 54% (95% CI: −0.09–1.18), with individual study prevalence ranging from 6 to 89%. Subgroup analysis showed that the random pooled prevalence of LSD was 28% (95% CI: −1.48–2.03) in Ethiopia, 37% (95% CI: −3.79–4.52) in Uganda, 88% (95% CI: −0.11–1.28) in Zimbabwe, and 58% (95% CI: −6.96–8.72) in Egypt. No single study was documented from western and northern Africa. Conclusion. The estimated pooled LSD prevalence was investigated as high and indicated nonsignificant variation among study countries. Thus, vaccination of cattle, quarantine, and biting insect control should be applied to control the disease. [ABSTRACT FROM AUTHOR]

The proposed study was carried out on adult crossbred cattle showing classic clinical signs of Lumpy skin disease at private dairy farms as well as on animals of individual holdings in the Bikaner, Rajasthan. This was verified by clinical examinations and molecular diagnosis was preferred by PCR. The 16 cattle were selected for this experiment, which underwent clinical examinations and hematology and serum biochemistry parameters evaluation. Cattle were randomly divided into two groups, Group-II was treated with polyherbal preparation A and Group-III was treated with polyherbal preparation B. Eight healthy adult cattle were retained as the control group (Group-I). In LSD affected cattle, Major clinical manifestations were pyrexia, anorexia, emaciation, lymph node enlargement, skin nodules,lacrimation and oedema. Clinical vital parameters revealed significantly (p<0.05) higher values of rectal temperature, heart rate and respiration rate while significantly (p<0.05) decreased rumen motility. Haematological results showed significant (p<0.01) reduction in mean values of Hb, PCV, TEC, TLC and platelet count when compared to healthy cattle(Group-I). Significant neutrophilia and lymphopenia showed in DLC values, in affected cattle. Pre-treatment hypoproteinemia, hypoalbuminemia, and increased concentration of SGOT, SGPT, ALP, creatinine and blood urea nitrogen (BUN) showed by LSD affected cattle. After therapeutic management of LSD affected cattle with polyherbal formulations for 15 days in both groups, improvement towards normalcy in haemato-biochemical parameters were observed with variation in efficacies of different treatment regimens at different time intervals. Therapeutic effect of polyherbal formulations was observed in the LSD affected cattle that showed significant improvement in various clinical signs, haemato-biochemical parameters. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is one of the most important diseases causing great economic losses in live animals stock industry of affected countries. It is an infectious vector borne viral illness considered one of major trans-boundary animal diseases affecting cattle and Asian domestic buffaloes (Bubalus bubalis). The aim of the current review is to clarify the current status of LSD epidemiology and to throw light on the methods of LSD diagnosis, prevention, treatment and control. LSD is rarely fatal, characterised by nodules on the entire skin of the affected animals, and has a high morbidity rate. The disease has severe direct adverse effects on cattle production, milk yields and animal body condition from damage of hides, abortions, infertility and other indirect effects resulted from restriction of animal movements and trade. The first recorded outbreak was in Zambia in 1929. It is considered an endemic disease in African continent. First report of LSD in Egypt was in Suez Canal governorate in 1988. Diagnosis of LSD virus depends on the highly characteristic clinical signs in severely infected cases. In mild cases the diagnosis depends on the detection and isolation of the virus on different cell lines and on chorio-allantoic membranes of embryonated chicken eggs. Viral nucleic acid detection by molecular techniques as real time PCR is considered the test of priority because it is rapid, sensitive and quantitative. Prevention of the disease depends mainly on vaccination programmes for the entire cattle and buffalo populations, restriction of animals' movement inside the country and through country borders, controlling insect vectors, in addition to symptomatic treatment of infected animals. [ABSTRACT FROM AUTHOR]

This study aimed to determine the persistent duration of maternal immunity against lumpy skin disease virus (LSDV) in dairy calves born from vaccinated cows using a virus neutralization test (VNT). The performance of the VNT and an in-house-ELISA test was also determined. Thirty-seven pregnant cows from 12 LSD-free dairy farms in Lamphun province, Thailand were immunized with a homologous Neethling strain-based attenuated vaccine and calved from December 2021 to April 2022. Blood samples from dam-calve pairs were collected within the first week after calving. Subsequently, blood samples were taken from the calves at monthly intervals over a period of 4  months and tested for the humoral immune response using a VNT. The calf sera were also tested with an in-house ELISA test to estimate the accuracy of both tests using a Bayesian approach. For the results, antibodies against LSDV can persist in cows for 4-9  months post-vaccination. Moreover, neutralizing antibodies and LSDV-specific antibodies against LSDV were detected in the majority of calves (75.68%) during the first week after colostrum intake. However, the percentage of seropositive calves declined to zero by day 120, with seropositivity dropping below 50% after day 60. Only a small number of seropositive calves (approximately 13.51%) were observed on day 90. These findings indicated that passive immunity against LSDV can last up to 3  months. The median of posterior estimates for sensitivity (Se) and specificity (Sp) of the VNT were 87.3% [95% posterior probability interval (PPI)  =  81.1-92.2%] and 94.5% (95% PPI  =  87.7- 98.3%), respectively. The estimated Se and Sp for the ELISA test were 83.1% (95% PPI  =  73.6-92.6%) and 94.7% (95% PPI  =  88.4-98.5%), respectively. In conclusion, this study illustrates the transfer and persistence of maternal passive immunity against LSDV to calves under field conditions. This highlights a potential three-month vaccination gap in calves born from vaccinated cows, while an in-house ELISA test can be used as an ancillary test for LSDV immune response detection. However, further research is required to assess the vaccination protocols for calves as young as 2  months old to precisely determine the duration of maternal immunity [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is an emerging transboundary and highly infectious viral disease mainly affecting cattle. The fact that it was initially confined to Africa and then spread beyond its geographical range to other regions, including the Middle East, Turkey, Europe, the Balkans, Russia and Asia, is an indication of the underestimation and neglect of this disease. Vaccination is considered the most effective way to control the spread of LSDV, when combined with other control measures. LSD is now on the rise in Southeast Asia, where the circulating virus belongs to recombinant lineage 2.5. In this study, we evaluated the efficacy of an attenuated LSDV strain belonging to the Neethling cluster 1.1 by challenge with a virulent recombinant vaccine-like LSDV isolate "Mongolia/2021" belonging to cluster 2.5. Some of the vaccinated animals showed an increase in body temperature of 1–1.5 °C above the physiological norm, without clinical signs, local reactions, vaccine-induced viremia or generalization, demonstrating the efficacy and safety of the vaccine strain against a recombinant strain. Furthermore, all the vaccinated animals showed strong immune responses, indicating a high level of immunogenicity. However, the control group challenged with "Mongolia/2021" LSD showed moderate to severe clinical signs seen in an outbreak, with high levels of virus shedding in blood samples and nasal swabs. Overall, the results of the present study demonstrate that the attenuated LSDV Neethling strain vaccine has a promising protective phenotype against the circulating strains, suggesting its potential as an effective tool for the containment and control of LSD in affected countries from Southeast Asia. [ABSTRACT FROM AUTHOR]

Lumpy skin disease (LSD) is an infectious disease currently spreading worldwide and poses a serious global threat. However, there is limited evidence and understanding to support the use of models to inform decision-making in LSD outbreak responses. This review aimed to identify modelling approaches that can be used before and during an outbreak of LSD, examining their characteristics and priorities, and proposing a structured workflow. We conducted a systematic review and identified 60 relevant publications on LSD outbreak modelling. The review identified six categories of question to be addressed following outbreak detection (origin, entry pathway, outbreak severity, risk factors, spread, and effectiveness of control measures), and five analytical techniques used to address them (descriptive epidemiology, risk factor analysis, spatiotemporal analysis, dynamic transmission modelling, and simulation modelling). We evaluated the questions each analytical technique can address, along with their data requirements and limitations, and accordingly assigned priorities to the modelling. Based on this, we propose a structured workflow for modelling during an LSD outbreak. Additionally, we emphasise the importance of pre-outbreak preparation and continuous updating of modelling post-outbreak for effective decision-making. This study also discusses the inherent limitations and uncertainties in the identified modelling approaches. To support this workflow, high-quality data must be collected in standardised formats, and efforts should be made to reduce inherent uncertainties of the models. The suggested modelling workflow can be used as a process to support rapid response for countries facing their first LSD occurrence and can be adapted to other transboundary diseases.