4 results on '"Krishnamurthy, Rajamanickam"'
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2. Microplastics in Demersal Sharks From the Southeast Indian Coastal Region
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Madhuvandhi Janardhanam, Priya Sivakumar, Gomathi Srinivasan, Rekha Sivakumar, Priscilla Niranjani Marcus, Sujatha Balasubramaniam, Krishnamurthy Rajamanickam, Thiagarajan Raman, Gopalakrishnan Singaram, and Thilagam Harikrishnan
- Subjects
shark ,microplastics ,marine pollution ,fish ,fisheries ,aquaculture ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
Microplastic (MPs) contamination has emerged as a serious worldwide issue. Human activity, commercial enterprises, and fishing are concentrated around the seashore, causing high levels of MPs contamination in coastal and marine organisms. When it comes to their vulnerability to MPs ingestion, sharks are least studied organism. The objective of this study is to investigate MPs accumulation in sharks collected from the Southeast Indian coastal zone (Bay of Bengal). We present evidence of MPs ingestion in demersal sharks caught by the trawlers during trawling operations in marine waters beyond a depth of 80 m in the Southeast India coast. Shark samples were also checked for any gender or size differences in contaminant loading. Gill and gut (digestive tract) were examined in 40 sharks and 82.5% of samples contained at least one MP particle. The average number of MP particles was found to be 4.67 items per individual shark; the gastrointestinal tract showed more MPs than the gills. The majority of the MPs were blue and pale white followed by black and transparent particles with diameters ranging from 0.5 to 2 mm. The fibre fragments were prevalent in the intestines of the shark. Fourier Transform Infrared (FT-IR) spectroscopy revealed that the bulk of polymers were polypropylene (PP), polyacrylamides (PA), and polyethylene (PE). MPs contamination poses an unknown level of harm to shark species. The present study revealed the first scientific data of MPs and associated fibre ingestion in shark species in their habitat in the Bay of Bengal.
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- 2022
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3. COVID-19 and Tuberculosis: Two Knives in a Sheath
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Konda Mani Saravanan, Bupesh Giridharan, Kishore Kumar Meenakshi Sundaram, Attuluri Vamsi Kumar, Thomas Alphonsa, Sangeetha Rajendran, Krishnamurthy Rajamanickam, null Alemtoshi, Vellingiri Balachandar, and Pranjal Bharali
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Microbiology (medical) ,Immunology ,Immunology and Allergy - Abstract
Severe Acute Respiratory Syndrome Coronavirus 2 (SARS CoV-2) has caused a global human outbreak, making it a more serious threat to human health than any other infectious disease. Coronavirus infectious disease 2019 (COVID-19) has severely affected the lifestyles of people around the world and caused high mortality throughout the world. In both pandemic and seasonal influenza, co-infection of COVID-19 with other diseases has been linked to worse outcomes. The literature revealed that it is characteristically associated with comorbidities such as hypertension, blood pressure, obesity, cardiovascular diseases, and other microbial infections. Furthermore, microbial coinfections worsen respiratory viral infections and are a common cause of death in influenza pandemics. Deplorably, Tuberculosis (TB) is also a dreadful lung infection and attains cytokine equilibrium with host cells to maintain the latent stage. Studies showed that human coronaviruses (hCoV) activate latent TB to an active state due to unregulated cytokine production, called a cytokine storm. The present review concisely discusses the reason and status of co-infection of COVID-19 with TB based on previous case reports, cohorts, and scientific studies. COVID-19 patients are prone to be infected with TB and vice-versa in TB-prone areas. The therapeutic opportunities for overcoming the COVID-19 induced cytokine storm have also been emphasized by the present clinical trial candidates. In conclusion, we recommend categorizing the patients based on their medical history and cured or latent TB patients should be particularly closely monitored. They should be tested for Interferon Gamma Release Assay (IGRA) regularly on and after COVID-19 infection.
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- 2022
- Full Text
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4. Microplastic contamination in commercial fish species in southern coastal region of India
- Author
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Thilagam, Harikrishnan, Madhuvandhi, Janardhanam, Priya, Sivakumar, Rekha, Sivakumar, Krishnamurthy, Rajamanickam, Thiagarajan, Raman, Muthukumar, Thangavelu, Govarthanan, Muthusamy, and Gopalakrishnan, Singaram
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Environmental Chemistry ,General Medicine ,General Chemistry ,Pollution - Abstract
Due to its potential impact on food safety and human health, commercial species that have been contaminated with microplastics (MPs) are drawing more attention on a global scale. This study investigated the possibility of MPs contamination in different marine fish species with substantial commercial value that was captured off the south coast of India, from Adyar and Ennore regions. Over the course of six months, from October 2019 to March 2020, 220 fish were examined. It was discovered that the gills and guts had accumulated more numbers of MPs (1115 MPs) of which 68% were fibres and fragments. The commercial fish samples contained an average of 3.2-7.6 MPs per fish. Greater MPs pollution is seen in the Ennore regions. The prevalence of MPs was observed in carnivorous and planktivorous fish collected from both the sites. Fish guts contained the most MPs, according to the data. Pelagic fish accounted for the least amount of MPs, followed by mid- and demersal fish. Four different types of polymers were also identified in the present study: polyethylene, polypropylene, polystyrene, and polyamide. These results clearly showed the degree of microplastic contamination in fish tissues from the south Indian coastal regions of Adyar and Ennore. These results we hope will create a baseline data for MPs contamination in commercial fish species. The presence of MPs in the fish could have detrimental effects both on the environment and human health and thus comprehensive steps are required to prevent plastic pollution of the environment in south India's coastal region.
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- 2023
- Full Text
- View/download PDF
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