3 results on '"Bishop MAGIDANGA"'
Search Results
2. Porcine circovirus-2 in Africa: Identification of continent-specific clusters and evidence of independent viral introductions from Europe, North America and Asia
- Author
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Germaine L Minoungou, Martha Yami, G. Dautu, Charles Mayenga, Adeyinka Jeremy Adedeji, Bruno Lalidia Ouoba, David Shamaki, Iolanda Vieira Anahory, Lourenço P Mapaco, Ebere Roseann Agusi, Tirumala B. K. Settypalli, Bishop Magidanga, Giovanni Cattoli, M. Diop, Mame Thierno Bakhoum, William G. Dundon, Jeremiah Ijomanta, Anvou Rachael Jambol, Modou Moustapha Lo, Jelly S Chang'a, Zerbo Lamouni Habibata, Maureen Wakwamba Ziba, Giovanni Franzo, Curé Georges Tshilenge, José Luís de Barros, Pam Dachung Luka, Sara J Achá, Charles Euloge Lamien, Abel Wade, Charles Masembe, Jenna Elizabeth Achenbach, Daniel Gizaw, Umberto Molini, Esayas Gelaye, Clement Meseko, and Tesfaye Rufael Chibssa
- Subjects
Circovirus ,Swine ,Nigeria ,phylogeographic analysis ,complex mixtures ,Cape verde ,Farm level ,genotypes ,parasitic diseases ,Genotype ,Animals ,Circoviridae Infections ,Socioeconomics ,Swine Diseases ,General Veterinary ,General Immunology and Microbiology ,biology ,porcine circovirus-2 ,Africa ,General Medicine ,biology.organism_classification ,Orf2 gene ,Europe ,Phylogeography ,Porcine circovirus ,Tanzania ,Geography ,DNA, Viral ,Identification (biology) - Abstract
Porcine circovirus-2 (PCV-2) is associated with several disease syndromes in domestic pigs that have a significant impact on global pig production and health. Currently, little is known about the status of PCV-2 in Africa. In this study, a total of 408 archived DNA samples collected from pigs in Burkina Faso, Cameroon, Cape Verde, Ethiopia, the Democratic Republic of the Congo, Mozambique, Nigeria, Senegal, Tanzania, and Zambia between 2000 and 2018 were screened by PCR for the presence of PCV-2. Positive amplicons of the gene encoding the viral capsid protein (ORF2) were sequenced to determine the genotypes circulating in each country. Four of the nine currently known genotypes of PCV-2 were identified (i.e. PCV-2a, PCV-2b, PCV-2d and PCV-2g) with more than one genotype being identified in Burkina Faso, Ethiopia, Nigeria, Mozambique, Senegal and Zambia. Additionally, a phylogeographic analysis which included 38 additional ORF2 gene sequences of PCV-2s previously identified in Mozambique, Namibia and South Africa from 2014 to 2016 and 2019 to 2020 and available in public databases, demonstrated the existence of several African-specific clusters and estimated the approximate time of introduction of PCV-2s into Africa from other continents. This is the first in-depth study of PCV-2 in Africa and it has important implications for pig production at both the small-holder and commercial farm level on the continent. This article is protected by copyright. All rights reserved.
- Published
- 2021
3. Symptomatic and asymptomatic cases of African swine fever in Tanzania
- Author
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Charles Euloge Lamien, Tirumala B. K. Settypalli, Charles Mayenga, Giovanni Cattoli, Bishop Magidanga, Jenna Elizabeth Achenbach, Jelly S Chang'a, Aloyce Kamigwe, Mashaka Jeremiah, Denis Kalabi, Furaha Mramba, Julius J. Mwanandota, and Shukuru Guo
- Subjects
Genotype ,Swine ,040301 veterinary sciences ,Sus scrofa ,Virulence ,Genome, Viral ,Polymerase Chain Reaction ,Tanzania ,Asymptomatic ,African swine fever virus ,Virus ,Disease Outbreaks ,0403 veterinary science ,Rabbit haemorrhagic disease ,03 medical and health sciences ,Intergenic region ,medicine ,Animals ,African Swine Fever ,Phylogeny ,030304 developmental biology ,0303 health sciences ,Base Sequence ,General Veterinary ,General Immunology and Microbiology ,biology ,Outbreak ,Sequence Analysis, DNA ,04 agricultural and veterinary sciences ,General Medicine ,biology.organism_classification ,African Swine Fever Virus ,Virology ,Asymptomatic Diseases ,DNA, Intergenic ,medicine.symptom ,Sequence Analysis - Abstract
African swine fever (ASF) is an acute, highly contagious and deadly viral haemorrhagic disease of domestic pigs caused by African swine fever virus (ASFV). In ASF endemic countries, there are an increasing number of reports on circulating ASFV strains with different levels of virulence causing a broad range of clinical symptoms in susceptible animals. Tanzania, where ASFV is endemic since 2001, recorded several outbreaks including symptomatic and asymptomatic cases between 2015 and 2017. We collected 35 clinical samples from four outbreaks for diagnostic confirmation and sequenced the partial B646L (p72), the full E183L (p54) gene, the central variable region of the B602L gene and the intergenic region between the I73R and I329L genes to characterize molecularly the new ASFV isolates and analyse their relatedness with previously reported Tanzanian and foreign isolates. We detected ASFV in 21 samples, 15 from symptomatic and six from asymptomatic pigs. Phylogenetic analyses based on the partial p72 gene and the complete p54 (E183L) genes revealed that the ASFVs in samples from symptomatic pigs belonged to genotypes II and those in samples from asymptomatic pigs belonged to genotype IX. The CVR profiles of the p72 genotype II and genotype IX isolates differed between each other and from previously published Tanzanian sequences. The sequence analysis of the intergenic region between the I73R and I329L for the 2017 genotype II isolates showed the absence of one GGAATATATA motif in those isolates. This study showed the simultaneous circulation of two different ASFV genotypes with different levels of pathogenicity in Tanzania. Since the existence of sub-clinically infected pigs may contribute to the persistence of the virus, our findings suggest continuous surveillance and characterization of ASFV isolates in disease-endemic regions.
- Published
- 2019
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