THE EFFECTS OF PHOTOPERIOD AND A TRYPANOSOMA BRUCEIGAMBIENSE INFECTION ON THE REPRODUCTIVE ORGANS OF MALE MICROTUS MONTANUS

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Authors:
PORTIA U. ASHMAN
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and
J. R. SEED
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DOI:
https://doi.org/10.1530/jrf.0.0400051
Volume/Issue:
Volume 40: Issue 1
Page Range:
51–60
Article Type:
Research Article
Online Publication Date:
Sep 1974
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Summary.

The effects of photoperiod and a Trypanosoma brucei gambiense infection on the gonads of male Microtus montanus were studied. Uninfected males kept in constant light had significantly heavier testes than males kept in constant darkness. Infected voles kept under 12-hr light/12-hr dark or constant darkness had significantly smaller testes than the uninfected animals kept under identical lighting regimens. Infected males kept in constant light, however, maintained normal testicular weights, demonstrating that photoperiod conditions can modify the results of infection. In addition, it was shown that the trypanosomes have a predilection for the testes of Microtus montanus and accumulate in these organs in large numbers 15 days after intraperitoneal inoculation. Possible reasons for the predilection of the trypanosomes for the testes of mammals are discussed.

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Print ISSN:
1470-1626
Online ISSN:
1741-7899