RESUMO Objetivo: o objetivo deste estudo foi avaliar a prevalência e colonização de Candida na cavidade oral de indivíduos pediátricos com leucemia linfocítica aguda (LLA) e sua susceptibilidade/resistência à nistatina e à anfotericina B. Métodos: estudo transversal observacional com abordagem descritiva e analítica. A saliva foi coletada de 40 indivíduos diagnosticados com LLA e de 40 indivíduos saudáveis, como grupo comparativo, combinados por idade e sexo com o grupo LLA. A idade média para ambos os grupos foi de 8 anos de idade. O isolamento e a identificação das espécies de Candida foram realizados utilizando o CHROMagarCandidaTM e confirmados pela reação em cadeia da polimerase. As amostras foram submetidas a susceptibilidade antifúngica por meio de ensaio de microdiluição para nistatina e anfotericina B. As alterações salivares e a mucosite oral induzida por quimioterapia foram avaliadas utilizando o Guia de avaliação modificada. Resultados: A positividade para Candida foi superior aos indivíduos in situ (32,5%, 13/40) do que em um grupo comparativo (2,5%, 1/40) (p <0,001). Candida albicans foi a cepa mais prevalente (86,6%). A mucosite foi diretamente associada à colonização positive por Candida (p = 0,017) no grupo LLA, mas não relacionada com alterações salivares (p = 0,479). Seis estirpes de C. albicans (54,5%), no grupo LLA, eram resistentes à nistatina e todas as cepas não eram suscetíveis à anfotericina B. Conclusão: A colonização por Candida foi associada à condição LLA e à mucosite oral nesses indivíduos. C. albicans era a cepa predominante e a maioria das amostras eram resistentes aos agentes antifúngicos testados, nistatina e anfotericina B.

ABSTRACT Objective: The aim of this study was to evaluate the prevalence of Candida colonizationon oral cavity of pediatric individuals with acute lymphocytic leukemia (ALL) and its susceptibility/resistance to nystatin and amphotericin B. Methods: This was a cross sectional study with observational, descriptive and analytic approach. Saliva was collected from40 individuals diagnosed with ALL and from40 healthy subjects, as a comparative group, matched by age and gender with ALL group. The mean age for both groups were 8 years-old. The isolation and identification of the Candidaspecies were performed using the CHROMagarCandidaTM and confirmed by polymerase chain reaction. The samples were subjected to antifungal susceptibility by microdilution assay for nystatin and amphotericin B. Salivary alterations and chemotherapy-induced oralmucositis were evaluated using modifiedOral Assessment Guide. Results: The positivity to Candida was higher inALL individuals (32.5%,13/40)than in a comparative group(2.5%, 1/40) (p<0.001). Candida albicans was the most prevalent strain (86.6%). The mucositis was directly associated with positive Candidacolonization (p=0.017) in the ALL group but not related with salivary alterations (p= 0.479). Six strains of C. albicans (54.5%), on ALL group, were resistant to nystatin and all strains were not susceptible to amphotericin B. Conclusion: Candida colonization was associated with ALL condition and with oral mucositis in these individuals. C. albicans was the prevalent strain and most samples were resistant to antifungal agents tested, nystatin and amphotericin B.

ABSTRACT Group A rotaviruses are the main causative agent of infantile gastroenteritis. The segmented nature of the viral genome allows reassortment of genome segments, which can generate genetic variants. In this study, we characterized the diversity of the VP7, VP4 (VP8*), VP6, NSP4, and NSP5 genes of the rotaviruses that circulated from 2005 to 2011 in the Triângulo Mineiro (TM) region of Brazil. Samples with genotypes G2 (sublineages IVa-1 and IVa-3), G1 (sublineage I-A), G9 (lineage III), G12 (lineages II and III), G8 (lineage II), G3 (lineage III), P[4] (sublineages IVa and IVb), P[8] (sublineages P[8]-3.6, P[8]-3.3, and P[8]-3.1), I2 (lineage VII), E2 (lineages VI, XII, and X), and H2 (lineage III) were identified. The associations found in the samples were G1, G9, or G12 with P[8]-I1-E1-H1; G2 or G8 with P[4]-I2-E2-H2; G12 with I3-E3-H6; and G3 with P[4]-I2-E3-H3 (previously unreported combination). Reassortment events in G2P[4] strains and an apparent pattern of temporal segregation within the lineages were observed. Five TM samples contained genes that exhibited high nucleotide and amino acid identities with strains of animal origin. The present study includes a period of pre- and post-introduction of rotavirus vaccination in all Brazilian territories, thereby serving as a basis for monitoring changes in the genetic constitution of rotaviruses. The results also contribute to the understanding of the diversity and evolution of rotaviruses in a global context.