Browsing by Author "Thilagavathi, K."
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ArticleItem Open Access Carbofuran Poisoning in a Sheep Flock(Indian Veterinary Association, 2018-03) Arulmozhi, A.; Madheswaran, R.; Thilagavathi, K.; Balasubramaniam, G.A.; TANUVASEight sheep carcasses in the age group of 6 months to 2 years old were brought for postmortem examination to the Department of Veterinary Pathology, Veterinary College and Research Institute, Namakkal with the history of muscle tremor and sudden death. Detailed necropsy was carried out and the samples were collected in saturated salt solution and 10% neutral buffered formalin for toxicological and histopathological examinations respectively. The liver and kidneys were severely congested and the mucosa of the abomasum and intestines revealed severe congestion andhaemorrhagic contents. There were severe degenerative and necrotic changes in the liver, kidney, abomasum and intestine. Toxicological examination revealed the presence of carbofuranin theliver, kidney and rumen contentArticleItem Open Access DETECTION OF Mycoplasma gallisepticum FROM FIELD SAMPLES OF LAYING CHICKEN USING PCR(Int. Journal of Science, Environment and Technology, 2017) Thilagavathi, K.; Sivaseelan, S.; Balasubramaniam, G.A.; Balasubramaniam, A.; Arulmozhi, A.; Madheswaran, R.; TANUVASMycoplasma gallisepticum is the most important and infectious mycoplasmosis. It causes severe economic losses to poultry farmers in Namakkal district of Tamil Nadu. Sixty five commercial layer flocks with lesions suggestive of Mycoplasma gallisepticum were investigated during the study period of May 2014 to April 2015. The samples such as choanal cleft swab, tracheal swab, trachea, lungs and air sacs were inoculated into frey’s broth medium and these were subjected to polymerase chain reaction and was confirmed using species specific primer. Out of these 65 farms, 36 farms were positive for MG. it is concluded that, PCR assay for the detection of Mycoplasma gallisepticum infection is good and rapid technique for diagnosis. So it is way to decrease the economic losses to poultry industry.ArticleItem Open Access ENTEROLITH ASSOCIATED TOXEMlC DEATH IN A HORSE(2017-10) Arulmozhi, A.; Madeswaran, R.; Thilagavathi, K.; Balasubramaniam, G.A.; TANUVASEnterolithiasis remains an important and common cause for colic in horses throughout the world. Excessive levels of dietary magnesium, nitrogen and phosphorus have been considered to contribute to. enterolith formation because struvite is the predominant component of enteroliths (Hassel et al., 2001).ArticleItem Open Access Occurrence and pathogenicity of Tetrameres mohtedai infection in desi chickens from Cauvery delta region of Tamil Nadu(TANUVAS, Chennai, 2021-11) Vijayasarathi, M.K.; Latchumikanthan, A.; Velusamy, R.; Thilagavathi, K.; Meenakshisundaram, A.; TANUVASOn post-mortem examination of five desi chickens, cherry red coloured spindle shaped worms were collected from the proventriculus of each bird for identification. Based on the morphological examination, these worms were identified as Tetrameres mohtedai. A high prevalence of Tetrameres mohtedai helminth infection was documented in desi chickens in Cauvery delta region of Tamil Nadu, which causes high morbidity and mortality in desi chickens from Cauvery delta region of Tamil Nadu. Appropriate deworming strategies need to be followed in desi chicken for the control of parasite in this region.ThesisItem Unknown Pathology of Mycoplasma Gallisepticum Infection in Laying Chicken(TANUVAS, Chennai, 2015) Thilagavathi, K.; TANUVAS; Sivaseelan, S.; Balasubramaniam, G.A.; Balasubramaniam, A.The prevalence and pathology of Mycoplasma gallisepticum and its combined pathogens among laying chicken in Namakkal region was studied. Sixty five commercial layer farms situated in and around Namakkal region with the history suggesting Mycoplasma gallisepticum infection were investigated for a period of one year (May 2014 to April 2015). Out of these, 36 farms were positive for MG and these occurred in different combinations of pathogens. Out of 36 farms, Mycoplasma gallisepticum alone was detected in 8 farms (22.22 per cent). The remaining 28 farms (77.78 per cent) were affected by MG with different combinations of concurrent infections like Escherichia coli, Avibacterium paragallinarum, Pasteurella multocida and Ornithobacterium rhinotracheale. The highest incidence of MG with combined infections were observed in the age group of 19 – 30 weeks (58.33 per cent) and in the month of December- 8 farms (22.22 per cent). The season- wise incidence of MG was highest during winter (Dec, Jan and Feb; 50.00 per cent). The highest mortality was observed in MG combined infection with E. coli and Pasteurella multocida (11.76 per cent). The layer chicken affected with MG showed respiratory distress, tracheal rales, increased lachrymation, nasal discharge, coughing and sneezing. The MG with combined infections showed reduced feed consumption, loss of body weight, decrease in egg production, mortality in later stage of diseases, swelling of facial skin and eyelids, and swollen comb and wattle. Grossly, MG affected birds showed catarrhal inflammation of trachea and bronchi, slight pneumonic changes in lungs, cloudiness, airsacculitis and caseous exudate in thoracic air sacs. Severely affected birds showed congestion and haemorrhages in lungs, caseous mass in both thoracic and abdominal air sacs and congested liver with petechial haemorrhages. In MG with E. coli combined infection, the affected birds showed fibrinous pericarditis and perihepatitis. Birds affected with MG and P. multocida combined infections showed multiple miliary necrotic areas in the liver. In MG with A. paragallinarum combined infection the affected birds showed bilateral infraorbital swelling. Cytological smears of CRD affected lung showed increased number of lymphocytes and macrophages. Histopathologically, focal destruction of superficial cells, goblet cell formation, hyperplasia of mucosal epithelium, submucosal infiltration of more number of lymphocytes, macrophages along with haemorrhagic areas were observed in the trachea of exclusive MG infection. Lungs revealed interstitial haemorrhage, parabronchiolar oedema, mucosal hyperplasia of secondary bronchiole and interstitial pneumonia characterised by thickening of interstitium. In the air sacs, increased thickness due to proliferation of submucosal connective tissue with fibroblasts, congested blood vessels, destruction of superficial epithelium and neovascularization in the connective tissue area were observed. The severity of microscopic lesions was intensified depending upon the number of combinations of various pathogens. More severe damage to the respiratory organs and corresponding mortality rate were noticed in MG, E. coli and P. multocida infections, and MG, E. coli and O. rhinotracheal infections. MG positive antigen was detected in the cilia of surface epithelium of trachea, parabronchiolar epithelium of lungs and surface epithelium of air sacs by immunoperoxidase tests. The positive reaction was seen as brown or red precipitates by DAB and AEC chromogen respectively.ArticleItem Unknown கறவை மாடுகளில் எரிசக்திக் குறைபாடு - பாதிப்பும் முன்னெச்சரிக்கையும் அறிவோமா?(TANUVAS, Chennai, 2021-01) Venkatesan, M.; Thilagavathi, K.; Veeraselvam, M.; TANUVASகறவை மாடுகளில் எரிசக்திக் குறைபாடு ஆண்டில் எப்போது வேண்டுமானாலும் ஏற்படலாம்.ArticleItem Unknown கோழி வாத நோய்த் (மாரெக்ஸ் நோய்/Marek's Disease) தடுப்பு முறை மற்றும் பராமரிப்பு முறைகள்(Kozhi Nanbhan, 2016-12) Thilagavathi, K.; Balasubramaniam, G.A.; TANUVAS