Some morphobiological studies on the early developmental stages of heterakis gallinarum [Schrank, 1788]

ABSTRACT

The morphology of 1st and 2nd stage larvae of Heterakis gallinarum removed from their egg shells was described. It has been experimentally proved that embryonated eggs containing first stage larvae did not hatch in the infested chicks. The hatched 2nd stage larvae were found at the distal third of the small intestine. It was noticed that these larvae having marked increase in size, morphological alteration and rapid sexual development in comparison with those obtained from the embryonated eggs mechanically