Aberrant migration of Ascaridia galli in a Myna (Acridotheres tristis)

Abstract

The normal habitat of the parasitic stages of Ascaridia galli is in the small intestine of poultry but the<br><br>exact life cycle is poorly understood. At necropsy, in retroperitoneal of a common Myna (Acridotheres tristis) that<br><br>was presented for autopsy, high number larvae of nematodes were found. After taking samples, the larvae were<br><br>subjected to parasitological examination. Larvae were identified Ascaridia galli that characterized by the<br><br>presence of three large lips and the oesophagus has no posterior bulb. This report clearly showed that few larvae<br><br>of Ascaridia galli could penetrate the small intestine and were positioned in the abdominal cavity at post<br><br>infection. It was far more common that the larvae were localized within the epithelium or in the lumen of the<br><br>crypts. It is therefore suggested that at least in this case “extra intestinal migratory phase” is a more appropriate<br><br>term to be used for the A. galli larval localization as compared to the term “non migratory phase” currently used<br><br>in many textbooks.