Some studies on the growth and development of Echinococcus granulosus, camel origin in experimentally infected dogs

Development of Echinococcus granulosus of camel subspecies in 35 experimentally infected dogs was performed at 3, 7, 10, 13, 18, 23, 35 and 56 days post-infection (d.p.i.). Morphological characters of each developmental stage was studied and discussed. Generally, the results indicate that the segmentation firstly appeared at 18 d.p.i. Also, male and female genitalia could be detected at the same period. However, completely developed of genitalia appeared at 56 d.p.i. Histological examination of small intestine of experimentally infected dogs revealed that the parasites were found in distended and thin wall crypts of Liberkuhn at 3, 7, & 10 d.p.i, while the parasite scolices were found embedded in the mucosa at 13, 18 & 23 d.p.i. No significant pathological changes were encountered in both infected and control dogs. This is the first report of strobilar development of E. granulosus of camel origin in experimentally infected dogs.