Browsing by Author "Chandramohan, A."
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ArticleItem Open Access Aeromonas Hydrophila Infection in Koi Carp and Gold Fish(Indian Journal of Animal Sciences, 2006-07) Roy, Parimal; Edwin, P.G.; Purushothaman, V.; Manohar, B. Murali; Chandramohan, A.; TANUVASArticleItem Open Access An Outbreak of Avian Encephalomyelitis in Tamil Nadu Sate of India(West Indian Veterinary Journal, 2009) Roy, Parimal; Hemalatha, S.; Vairamuthu, S.; Purushothaman, V.; Chandramohan, A.; Karunamurthy, G.; Koteeswaran, A.; Manohar, B. Murali; TANUVASAvian encephalomyelitis (AE) was recorded in 7-day old Ross strain of broiler chickens showing clinical signs of ataxia, lateral recumbency and mild tremors. In a flock of 10,000 birds, 12% died without producing gross pathological lesions. Diagnosis of the disease was done based on virus isolation in embryonated chicken's eggs, demonstraton of hexagonal virus particles in purkinje cells of cerebellum by electron mircropscopy and confirmation by agar gel immunodiffusion test using AE virus specific antiserum.ArticleItem Open Access Sheep Pox Disease Outbreaks in Madras Red and Mechery breeds of Indigenous Sheep in Tamilnadu, India(Research in Veterinary Science, 2008) Roy, Parimal; Purushothaman, V.; Sreekumar, C.; Tamizharasan, S.; Chandramohan, A.; TANUVASSheep pox disease outbreaks were recorded among Madras Red (n = 145) and Mechery (n=80) breeds of indigenous sheep on three farms in Tamilnadu. Over both breeds, adult mortality rate ranged from 2.66% to 37.5% and lamb mortality ranged from 10% to 17.33%. However, mortality was more in Mechery sheep (50% overall; 37.5% adults, 12.5% lambs) than in Madras Red sheep (24.28% overall; 10.34% adults, 13.79% lambs). The clinical signs observed were high fever, anorexia, respiratory distress, mucopurulent nasal discharge and in a few cases diarrhoea. Cutaneous lesions were mainly observed around nostrils, eyes, lips, ears and in the abdomen. Most of the observed over the oral commissure and maxillary areas, which on removal exposed fresh wounds were observed. Dry scabs were also observed over the oral commissure and maxillary areas, which on removal exposed fresh wounds. Important observations on necropsy were severe nodular lesions in the lungs and intestine. The disease was diagnosed as sheep pox by agar gel immunodiffusion test, isolation of virus and its neutralization in BHK21 cells by specific antiserum and by electron microscopy.ArticleItem Open Access Ultrastructural Changes in the Bursa of Chicken in Experimentally Infected Infectious Bursal Disease Virus(Indian Journal of Veterinary Pathology, 2006) Hemalatha, S.; Manohar, B. Murali; Chandramohan, A.; Balachandran, C.; Sundararaj, A.; TANUVASInfectious bursal disease (IBD) caused by a bisegmented RNA virus is a highly contagious disease affecting young chicken. The disease is characterised by lymphocytolysis and reticulum cell hyperplasia in the lymphoid organs especially bursa of Fabricius (BF)^3,4. The IBD virus replicates in the lymphoid cells and macrophages^2. The present paper describes ultrastructural details of bursa experimentally infected with IBD virus.