Abstract:
Newly isolated strains of Trichinella spiralis have shown different host-parasite relationship than classical strain of the parasite of being lower infectively to rats. The mechanism of this lower infectively is not related to intestinal phase either in having smaller number of sexually mature worms or to tissue reaction evoked in the intestine different than the classical strain. It was postulated that if the larvae are being born in equal numbers in all the strains then they might be withheld enroute to muscles. To explore this possibility histological sections of spleen, lung, mesenteric lymph nodes and heart of rats infected with Kenyan, Alaskan, N.W.T. and Senegal strains were observed and compared with old strain (Laboratory strain) on 7, 9, 14, 21 and 30 days post infection. Large number of encapsulated larvae with intense tissue reaction, characteristic. of abnormal host parasite relationship were not observed. It was inferred that all larvae reached to the normal site of lodgement without being withheld enroute to muscles. Single larva was found in lymph node, heart, muscle and lung. Tissue reaction evoked by the different strains in these organs was essentially similar as reported in the literature.
Page(s):
69-76
DOI:
DOI not available
Published:
Journal: Bulletin of zoology, Volume: 2, Issue: , Year: 1984