Abstract
The present study was designed to record prevalence of respiratory diseases in broiler and layer flocks in District, Lahore Pakistan during the period July, 2011 to June, 2012. Out of 220 broiler flocks, 72, 47 and 26 were found affected with infectious coryza, colibacillosis and CRD, respectively. The prevalence of infectious coryza, colibacillosis and CRD were found to be 32.72% 21.36% and 11.81% respectively. Out of 109 layer flocks, 68, 18 and 23 were found affected with infectious coryza, collibacillosis and CRD, respectively. The prevalence of infectious coryza, colibacillosis and CRD in layer was found to be 29-35%, 10.11% and 12.84% respectively. The respiratory diseases were recorded throughout the year, however, occurrence was more prevalent in winter season. During the study a total of 172 samples (liver, heart & lungs) were cultured out of which 78 were positive for E.coli isolates. The antibiotics lincomycin, norfloxacin and neomycin showed best efficacy against E.coli infections, whereas oxytetracyclin, doxycyclin, colistin showed least zones of growth inhibition.
Razia Sultana, Bushra Siddique, Rahat Ali, ShabnumIlyas Chaudhary, AzharMaqbool. (2012) A study on the prevalence of respiratory diseases in broiler and layer flocks in and around Lahore district , Punjab University Journal of Zoology, Volume 27, Issue 1.
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