A retrospective study of our 14-yr records on experimental Taenia crassiceps (ORFfast line) cysticercosis (n = 1,198) shows that in 16 of 17 different mice strains, female mice are more frequently infected and carry larger individual parasite loads than males. However, sexual differences in parasite loads significantly varies between strains in relation to their different genetic backgrounds (BALB > C57Bl = OTHERS > C3H). The coefficient of variation in all female mice is significantly smaller than that of all males, an indication of males' more potent, but erratically effective, restraint of cysticercus growth. Similar positive growth bias for female mice is shown by other lines of cysticerci, i.e., HYGslow and WFUslow. These results contravene the usual expectation of female hosts being more resistant than males to parasite infections, and they point to the multiple factors that combined determine sex related differences of mice to experimental cysticercosis infection.
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April 2008
RESEARCH NOTES|
April 01 2008
Preferential Growth of Taenia crassiceps Cysticerci in Female Mice Holds Across Several Laboratory Mice Strains and Parasite Lines
G. Fragoso;
G. Fragoso
aInstituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, A.P. 70228, México, D.F., C.P. 04510, México
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G. Meneses;
G. Meneses
aInstituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, A.P. 70228, México, D.F., C.P. 04510, México
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E. Sciutto;
E. Sciutto
aInstituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, A.P. 70228, México, D.F., C.P. 04510, México
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A. Fleury;
A. Fleury
aInstituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, A.P. 70228, México, D.F., C.P. 04510, México
bInstituto Nacional de Neurología y Neurociguría, C.P. México, D.F., México
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C. Larralde
C. Larralde
aInstituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, A.P. 70228, México, D.F., C.P. 04510, México
cTo whom correspondence should be addressed. [email protected]
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J Parasitol (2008) 94 (2): 551–553.
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G. Fragoso, G. Meneses, E. Sciutto, A. Fleury, C. Larralde; Preferential Growth of Taenia crassiceps Cysticerci in Female Mice Holds Across Several Laboratory Mice Strains and Parasite Lines. J Parasitol 1 April 2008; 94 (2): 551–553. doi: https://doi.org/10.1645/GE-1287.1
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