In this study, we present antifungal susceptibility data of clinical and
environmental isolates of Central Indian Cryptococcus neoformans
(Serotype A, n = 8 and n = 50 respectively) and Cryptococcus gattii
(Serotype B, n = 01 and n = 04 respectively). Susceptibilities to fluconazole,
itraconazole and ketoconazole were determined by using NCCLS broth micro-dilution
methodology. The total number of resistant strains for fluconazole in case of
C. neoformans and C. gattii showed a significant
difference by using chi-square test (p < 0.05*), while considering fisher's exact
p value was nonsignificant (p > 0.05). However, the total number of resistant
strains for itraconazole and ketoconazole was not found statistically significant. A
comparison of geometric means of clinical and environmental strains of C.
gattii and C. neoformans was not found statistically
significant using student ‘t’ test (p value > 0.05 NS). Though less, the
antifungal data obtained in this study suggests that primary resistance among
environmental and clinical isolates of C. neoformans and C.
gattii against tested antifungal was present and C.
gattii comparatively was less susceptible than C.
neoformans var. grubii isolates to fluconazole than to
itraconazole and ketoconazole. A continuous surveillance of antifungal susceptibility
of clinical and environmental isolates of C. neoformans and
C. gattii is desirable to monitor the emergence of any resistant
strains for better management of cryptococcosis patients.
Cryptococcus neoformans var. grubii and C. gattii were repeatedly isolated from decaying wood of trunk hollows in living trees growing in Jabalpur City in Central India. The isolation of C. gattii has been reported from decayed wood inside trunk hollow of Tamarindus indica (15.6%), Mangifera indica (2.2%), Pithecolobium dulce (12.5%), Syzygium cumini (14%), and one from bark of S. cumini. C. n. var. grubii was isolated from decaying wood debris of T. indica (4.4%), M. indica (13.3%), Terminalia arjuna (25%), S. cumini (2%), Cassia fistula (4.5%), and two from bark of S. cumini. The two species [corrected] never co-occurred in the same hollow. C. gattii [corrected] isolates belonged to serotype B. [corrected] The data strongly supported the colonization of the pathogen in decaying wood hollow of all six-tree species. Evidence of this was found by repeated isolation up to 820 days. P. dulce is being reported for the first time as natural habitat of C. gattii and T. arjuna and C. fistula as natural habitat for C. n. var. grubii. M. indica is being reported for the second time as the natural habitat of both species [corrected] (C. n. var. grubii and C. gattii). The population density of these pathogens from decaying wood debris of various tree species ranged between 0.5 x 10(3) cells/g and 6 x 10(5) cells/g. The seasonal variation has been seen in isolation of these pathogens. [corrected] Our result further reinforce the recently emerging evidence that the natural habitat of C. n. var. grubii and C. gattii is more generalized.
We would like to make following corrections to our article that appeared in Mycopathologia (2007) 164:159-170.Abstract, page 159, column 1, line 12, ''two varieties'' should read ''two species''. Abstract, page 159, column 1, lines 13-15, ''C. gattii and C. n. var. grubii isolates belonged to serotype B and serotype A, respectively'' should read ''C. gattii isolates belonged to serotype B''.Abstract, page 159, column 2, line 4, ''both varieties'' should read ''both species''. Abstract, page 159, column 2, line 9,
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