Report of filamentous forms in a mating type VNI clinical sequential isolates of Cryptococcus neoformans from an HIV virus-infected patient

We reported a cryptococcal meningitis Aids-patient infected with a mating type VNI isolate showing filamentous cells in direct examination of cerebrospinal fluid. Clinical data, outcome, treatment features and microbiological findings were discussed

Report of filamentous forms in a mating type VNI clinical sequential isolates of Cryptococcus neoformans from an HIV virus-infected patient.

We reported a cryptococcal meningitis Aids-patient infected with a mating type VNI isolate showing filamentous cells in direct examination of cerebrospinal fluid. Clinical data, outcome, treatment features and microbiological findings were discussed.

Phylogenetic analysis of phenotypically characterized Cryptococcus laurentii isolates reveals high frequency of cryptic species.

BACKGROUND: Although Cryptococcus laurentii has been considered saprophytic and its taxonomy is still being described, several cases of human infections have already reported. This study aimed to evaluate molecular aspects of C. laurentii isolates from Brazil, Botswana, Canada, and the United States. METHODS: In this study, 100 phenotypically identified C. laurentii isolates were evaluated by sequencing the 18S nuclear ribosomal small subunit rRNA gene (18S-SSU), D1/D2 region of 28S nuclear ribosomal large subunit rRNA gene (28S-LSU), and the internal transcribed spacer (ITS) of the ribosomal region. RESULTS: BLAST searches using 550-bp, 650-bp, and 550-bp sequenced amplicons obtained from the 18S-SSU, 28S-LSU, and the ITS region led to the identification of 75 C. laurentii strains that shared 99-100% identity with C. laurentii CBS 139. A total of nine isolates shared 99% identity with both Bullera sp. VY-68 and C. laurentii RY1. One isolate shared 99% identity with Cryptococcus rajasthanensis CBS 10406, and eight isolates shared 100% identity with Cryptococcus sp. APSS 862 according to the 28S-LSU and ITS regions and designated as Cryptococcus aspenensis sp. nov. (CBS 13867). While 16 isolates shared 99% identity with Cryptococcus flavescens CBS 942 according to the 18S-SSU sequence, only six were confirmed using the 28S-LSU and ITS region sequences. The remaining 10 shared 99% identity with Cryptococcus terrestris CBS 10810, which was recently described in Brazil. Through concatenated sequence analyses, seven sequence types in C. laurentii, three in C. flavescens, one in C. terrestris, and one in the C. aspenensis sp. nov. were identified. CONCLUSIONS: Sequencing permitted the characterization of 75% of the environmental C. laurentii isolates from different geographical areas and the identification of seven haplotypes of this species. Among sequenced regions, the increased variability of the ITS region in comparison to the 18S-SSU and 28S-LSU regions reinforces its applicability as a DNA barcode.

Condiçöes sanitárias de águas de piscinas de Campo Grande, Mato Grosso do Sul

Com a finalidade de estudar as condiçöes sanitárias de águas de piscinas de uso coletivo da cidade de Campo Grande (MS), foram realizadas análises físico-químicas e bacteriológicas e pesquisadas as leveduras, algas e amebas de vida livre. No período de 9 de agosto de 1981 a 27 de junho de 1982, foram coletadas 336 amostras constatando-se que as piscinas näo mantem níveis de cloro suficientes a desinfecçäo. A presença dos microorganismos antes mencionados, indica a necessidade de tratamento adequado da água: treinamento especializado de operadores e a prática de princípios básicos de saúde. Paralelamente e imperioso o estabelecimento de legislaçäo estadual fixando os limites dos paramêtros físico-químicos, como também microbiológicos a serem seguidos visando a manutençäo da qualidade estética e sanitária da água