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A Molecular Approach to Understand the Involvement of Mycoplasma in Suppurative Otitis Cases of Cattle in Chittoor District of Andhra Pradesh

DOI : https://doi.org/10.36349/easjvms.2024.v06i03.001
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In bovines the economic losses mainly due to the outbreak of diseases, leads to mortality, morbidity, treatment cost and reduced production. Recently in August month of 2024, received 13 bovine suppurativeotitis samples from outbreak in KuppamMandal of Chittoor district. The history having the purulent discharges with foul smell from ear infections of cattle that to crossbreed cattle of all age groups are affected. After 5 days of appearing aural discharges the animals were also shown the nervous signs, head tilting and other clinical findings includes unilateral or bilateral ear droop, epiphora, ptosis, abnormal nystagmus, strabismus, regurgitation, stiff neck, opisthotonus, facial hyperesthesia, purulent aural discharge, nasopharyngeal collapse, recumbency and finally death were noticed in severely affected animals. All the samples were processed for cultural tests by inoculating in PPLO selective broth and selective media PPLO agar then incubated anaerobically at 370C and observed the color development in broth pink to yellow color after 3- 5 days of incubation indicative of positive growth and fried egg micro colonies on selective PPLO agar media after 8-14 days of incubation observed under low power and 40X. The DNA was isolated from all the samples and screened for presence of Mycoplasma by targeting 16s rRNA gene and found that out of 13 samples 10 were positive for genus Mycoplasma and produced the predicted 280bp size product in all positive samples. The suppurativeotitis in cattle usually is caused by Actinomyces spp., Corynebacterium pseudotuberculosis, E. coli, Heamophilus, P.multocida, Pseudomonas spp, Streptococcus spp., and Mycoplasma bovis. This study was targeted only the emerging pathogen i.e the cellwall deficient bacteria Mycoplasma because of infections is hampered by a lack of effective vaccines and specific treatments, leads to increasing trends in antimicrobial resistance. Concluded that isolation and identification of the pathogenic ........

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Dr. Afroza Begum

Lecturer, Dept. of Pharmacology and Therapeutics, Shaheed Monsur Ali Medical College & Hospital, Uttara, Dhaka-1230, Bangladesh

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