17 F. Mahmood A. Khan R. Hussain M. S. Anjum Journal of Animal and Plant Sciences JAPS 20142014/06/01 24 3 743-748 1018-7081 NA <p>The nematode,<em>&nbsp;Dictyocaulus viviparus</em>, causes severe parasitic bronchitis in dairy animals and is responsible for significant economic losses. Present study was conducted to determine the occurrence of bovine lungworm&nbsp;<em>Dictyocaulus viviparus&nbsp;</em>ahighly endemic parasite. The fecal samples were collected from buffaloes (n=235) and cattle (n=210) and examined using Baermann technique<em>.</em>&nbsp;After slaughtering the lungs of all the buffaloes and cattle were separated and carefully examined for the presence of&nbsp;<em>D. viviparus</em>&nbsp;at Faisalabad abattoir.Overall non-significant difference in prevalence of&nbsp;<em>D. viviparus</em>&nbsp;in fecal samples of cattle (4.76%) and buffaloes (5.10%) was recorded. Grossly morbid lung tissues from buffalo (n=5) and cattle (n=3) revealed nodular appearance, severe pneumonia and congestive changes. Multifocal lymphocytic and eosinophilic bronchiolitis along with widened interlobular pulmonary septa were observed in lungs sections infected with<em>&nbsp;D. viviparus.</em>&nbsp;Lungs tissue exhibited peribronchiolar aggregation of mononuclear cells, presence of eggs and different developmental stages including, newly hatched and L1 stage of&nbsp;<em>D. viviparus</em> in air spaces.</p> Buffaloes, Cattle, Nematode, Dictyocaulus viviparus, Lungs, Pathology. Pakistan Agricultural Scientists Forum https://thejaps.org.pk/AbstractView.aspx?mid=2014-JAPS-104