Molecular characterization of clinical and environmental isolates from the Cryptococcus neoformans/C. Gattii species complexes of Maceió, Alagoas, Brazil

被引:0
作者
Fonseca, Douglas Lyra de Holanda [1 ]
da Silva, Denise Maria Wanderlei [2 ]
Maranhao, Fernanda Cristina de Albuquerque [2 ]
机构
[1] Univ Sao Paulo, Inst Biomed Sci, Dept Microbiol, Sao Paulo, Brazil
[2] Univ Fed Alagoas, Inst Biol & Hlth Sci, Lab Clin Microbiol, Sect Microbiol, Ave Lourival Melo Mota S-N, BR-57072900 Maceio, AL, Brazil
关键词
Cryptococcus neoformans; Cryptococcus gattii; Cryptococcosis; Molecular typing; RFLP; PRIMARY CUTANEOUS CRYPTOCOCCOSIS; ANTIFUNGAL SUSCEPTIBILITY; ENDEMIC CRYPTOCOCCOSIS; VAR; NEOFORMANS; 1ST ISOLATION; VGII; GENOTYPE; STATE; MENINGITIS; AMAZONAS;
D O I
10.1007/s42770-024-01313-1
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Cryptococcosis is one of the major life-threatening opportunistic/systemic fungal diseases of worldwide occurrence, which can be asymptomatic or establish pneumonia and meningoencephalitis mainly in immunosuppressed patients, caused by the Cryptococcus neoformans and C. gattii species complexes. Acquisition is by inhaling fungal propagules from avian droppings, tree hollows and decaying wood, and the association of the molecular types with geographic origin, virulence and antifungal resistance have epidemiological importance. Since data on cryptococcosis in Alagoas are limited, we sought to determine the molecular types of etiological agents collected from clinical and environmental sources. We evaluated 21 isolates previously collected from cerebrospinal fluid and from environment sources (pigeon droppings and tree hollows) in Maceio-Alagoas (Brazil). Restriction fragment length polymorphism of URA5 gene was performed to characterize among the eight standard molecular types (VNI-VNIV and VGI-VGIV). Among isolates, 66.67% (14) were assigned to C. neoformans VNI - 12 of them (12/14) recovered from liquor and 2 from a tree hollow (2/14). One isolate from pigeon droppings (4.76%) corresponded to C. neoformans VNIV, while five strains from tree hollows and one from pigeon droppings (6, 28.57%) to C. gattii VGII. VNI-type was present in clinical and environmental samples and most C. neoformans infections were observed in HIV-positive patients, while types VNIV and VGII were prevalent in environmental sources in Alagoas. This is the first molecular characterization of Cryptococcus spp. in Alagoas, our study provides additional information on the ecoepidemiology of Cryptococcus spp. in Brazil, contributing to a closer view of the endemic species.
引用
收藏
页码:1369 / 1380
页数:12
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