Comparative studies on Ancylostoma braziliense and Ancylostoma ceylanicum. 3. Life history in the definitive host
Yoshida, Y.; Kondo, K.; Kurimoto, H.; Fukutome, S.; Shirasaka, S.
Journal of Parasitology 60(4): 636-641
1974
ISSN/ISBN: 0022-3395 PMID: 4851100 Document Number: 71443
After oral inoculation into puppies the development of Ancylostoma ceylanicum and A. braziliense followed similar patterns. The 3rd-stage larvae moulted in the intestinal wall during days 2 to 3 after infection, the 4th-stage larvae subsequently emerged into the lumen and immature adults were recovered on and after day 6. Eggs first appeared in the faeces on day 14. However, following cutaneous infection the development of the 2 species differed. Both migrated from the skin to the intestine via the lungs, trachea and oesophagus but while A. ceylanicum moulted to the 4th-stage in the trachea and stomach, A. braziliense did so following penetration into the gut wall. A. ceylanicum took one day longer to reach the intestine than A. braziliense but the subsequent rate of development of the 2 species was similar. 4th-stage larvae were recovered 3 days after infection, immature adults on day 7 and eggs were detected in the faeces on day 14. Worm recovery at 3 weeks was equivalent to 90% of the oral infective doses for both species. Infection via the skin gave recoveries of 15% for A. ceylanicum and 35% for A. braziliense.