a survey on annual infestation of sheep with lung worms based on fecal test and slaughter house study in tabriz

bronchopneumonia is one of the most important ovine diseases in iran. this disease can be due to bacteria, viruses and parasites. in the ruminants pulmonary worms are the most prevalent cause of this disease. this study was conducted to diagnose the infestation rate of pulmonary worms in small ruminants of east-azarbaijan. one thousand fecal samples were collected from sheep of different regions of tabriz (during one year 250 samples per season) and tested for the first stage of respiratory nematodes larvae by bearmann apparatus. furthermore, 400 lungs of slaughtered sheep were inspected and adult worms were isolated in the laboratory and recognized by diagnostic keys. results showed that 56.9% of the fecal samples were infested. infestation rate of sheep to dictyocaulus filarial, protostrongylus rufescens, muelerius capillaries and cystocaulus ocreatus were 28.9 %, 12.7%, 29% and 29.4%, respectively. significant difference was observed in the rate of infestation according to seasons by anova (p