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- W2025115436 abstract "To characterize the pathogenicity of 15 strains of Cryptococcus neoformans belonging to several serotype/mating type allele patterns (Dalpha, Da, A(alpha), A(a), A(alpha)/D(a) and D(alpha)/A(a)) in experimental models of murine cryptococcosis.CD1-infected mice were examined for survival and fungal loads in either brain or lung during the course of infection.All strains, with the exception of one Da strain, produced melanin in vitro. Similarly, all strains were encapsulated and produced phospholipase. When CD1 mice were challenged intravenously (i.v.) with 5x10(5)CFU/mouse and observed for 60 days post-infection, a significant variation of mortality rate was observed among mice infected with different strains. A(alpha) and A(alpha)/D(a) strains all produced 100% mortality within the study period with mean survivals significantly shorter than those of mice infected with strains belonging to any other allele type (P<0.0001). A wide range of pathogenicity was shown by haploid and diploid strains presenting D(alpha) allele. This finding was confirmed by an intranasal model of challenge. To investigate the progression of infection, the mice were challenged i.v. with 5x10(4)CFU/mouse and tissue burden experiments (brain and lung) were performed on days 6 and 12 post-infection. Only the mice infected with A(alpha) and A(alpha)/D(a) strains showed a >1 log(10) increase of CFU/g in both tissues throughout the study period.Our results suggest that the presence of the A(alpha) mating type allele in either haploid or diploid strains is correlated with virulence, while the presence of the A(a) or D(a) allele in haploid strains is associated with moderate or no virulence. Finally, either haploid or diploid strains presenting D(alpha) allele vary in virulence." @default.
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- W2025115436 date "2005-07-01" @default.
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- W2025115436 title "Comparative analysis of pathogenicity of Cryptococcus neoformans serotypes A, D and AD in murine cryptococcosis" @default.
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- W2025115436 doi "https://doi.org/10.1016/j.jinf.2004.07.013" @default.
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