Experimental infection of inbred mouse strains with Spironucleus muris

1998 
Four inbred mouse strains: BALB/c ByJ, 129/J, C3H/HeJ, and DBA/1J, differing in major histocompatibility type, were orally inoculated with 2×105 infectious cysts of Spironucleus muris. Fecal samples were collected for fecal cyst output prior to infection, and on days 2, 6, 7, 8, 9, 11, 13, 15, and 17 after infection. Following necropsy, formalin-fixed intestinal sections were examined for the presence of trophozoites. On post-inoculation days 6 and 8, mice of the 129/J strain shed significantly (p<0.05) fewer cysts than other strains. This pilot study suggests that major histocompatibility haplotype may influence susceptibility of inbred mouse strains to S. muris.
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