Navegando por Assunto "Cryptococcus gattii"

Agora exibindo 1 - 5 de 5

Acesso aberto (Open Access)
Avaliação audiomética em pacientes tratados de meningite por Cryptococcus gattii
(Universidade Federal do Pará, 2007) ALVES, Rogério Benjamim Francisco; SOUSA, Rita Catarina Medeiros; http://lattes.cnpq.br/3560941703812539
This study shows the audiometric evaluation, composed by tonal audiometry and imitanciometry, in patients treated for Cryptococcus gattii meningitis. It was analyzed six patients with proven Cryptococcus gattii central nervous system infection, interned in the Hospital Universitário João de Barros Barreto, Belém, PA, Brazil, between January of 2000 and November of 2007, for antifungal treatment. The age of the analyzed patients ranged from 12 to 37 years-old. Three were men and three women. All of them originating from neighboring cities, nobody from the capital, Belém. The most common clinical findings were headache and vomiting, present in all the patients; fever and nuchal rigidity, each one absent in only one patient, not coincidents. The time of illness until the diagnosis varied from 3 to 8 weeks. Of the three evaluated men, hearing loss was presenting in two. In one of them deafness was moderate and unilateral and in the other it was bilateral and not symmetrical. Of the three women, only one presented hearing impairment. In this patient, occurred just a mild alteration in an isolated frequency, of 4.000 Hz. It is described audiometric findings in a relate of cases of patients treated for meningeal neurocryptococcosis due to Cryptococcus gattii.
Acesso aberto (Open Access)
Caracterização epidemiológica, genotípica e fenotípica da criptococose em uma unidade de referência no estado do Pará
(Universidade Federal do Pará, 2012) FURTADO, Karen Cristini Yumi Ogawa; ISHIKAWA, Edna Aoba Yassui; http://lattes.cnpq.br/3074963539505872; SOUSA, Rita Catarina Medeiros; http://lattes.cnpq.br/3560941703812539
Cryptococcosis is a fungal infection caused by an encapsulated yeast Cryptococcus genus that affects both humans and animals, and is considered as an opportunistic infection commonly associated with immunosuppression. This is one of human fungal infections cause significant morbidity and mortality in both immunocompetent and in immunocompromised individuals and appears mainly in the form of meningoencephalitis. The aim of this study was to characterize epidemiological, genotypic and phenotypic cryptococcosis in a reference unit in the state of Pará. The target population was composed of patients treated at the University Hospital João de Barros Barreto/UFPA, January 2010 to December 2011 with laboratory confirmed diagnosis of cryptococcosis. Personal, clinical and laboratory data were collected from a review of medical records file HUJBB and the isolates were identified and characterized morphologically and biochemically. The type sexed and genotype were identified by PCR using specific primers. From January 2010 to December 2011 were identified 59 cases of cryptococcosis. Most patients were men (36/59, 61%), aged 5-70 years, mean 30.8 years. The predominant age group was 34-43 years (39% of cases). The main signs and symptoms presented by them were headache (85.5%), vomiting (80%) and fever (76.4%). All children (6/6) were HIV negative, and as the causative agent C. gattii (31.6%), while in adults 71.1% of infections were caused by C. neoformans, most HIV positive. The cases of death and recurrence were higher among patients infected with C. neoformans and the presence of sequelae was more frequent among patients infected with C. gattii. All isolates were MAT α and there was a predominance of two molecular types: VNI (64.4%) and VGII (35.6%). This study reinforces that the state of Pará is endemic to infection by Cryptococcus spp., Whose main clinical presentation, meningoencephalitis determines high rates of morbidity and mortality.
Acesso aberto (Open Access)
Caracterização fenotípica de isolados de Cryptococcus gattii
(Universidade Federal do Pará, 2005-02-25) MAGALHÃES, Mioni Thieli Figueiredo; MAGALHÃES, Luiz Marconi Fortes; http://lattes.cnpq.br/6032076996211936; LAZÉRA, Márcia dos Santos; http://lattes.cnpq.br/7911244508417625
Cryptococcus neoformans was described as human pathogen in 1894. Since then, studies about fungal aspects as biology, taxonomy, ecology and epidemiology have been developed with great importance to medicine and the environment. The fungus was recently classified in two separated species, C. neoformans (serotypes A, D and AD) and C. gattii (serotypes B and C) each one with well defined genetic and morphological features as well as ecology and epidemiology aspects. C. neoformans occurs mainly in immunocompromised hosts, especially those infected by HIV. In the other hand, C. gattii infects mainly immunocompetents individuals to all lifetimes. The main factors determining the cryptococcosys pathogenesis have relations with the host defenses state, the size of particle and strain virulence, this last for four main features: the polyssacharide capsule, the melanin production, the mating types (MAT and MATa) and thermotolerance. The fungus has a transitory life cycle between haploid yeast form and dykariotic filamentous forms. The sexual cycles includes a mixture of genetic parental genes that form progenies containing the genetic characteristics of both. The asexual cycle occurs through a process know as haploid fruiting. The species are heterothallic with two mating types MAT and MATa. Phenotypic characterization studies, including the species identification, serotype and mating type have a great importance for conductions of profound studies because of the close relation between the ecological variants features and its development cycle and multiplication, especially in Brazilian regions North and Northeast where serotype B is the most prevalent cause of meningitis in ordinary hosts. This work used the CGB techniques for methabolic analysis (species identification), where 28 strains were positive, characterizing C. gattii and two were negative, characterizing C. neoformans. The serotyping results, make among agglutination test reveals 28 strains of serotype B and two of serotype A. The mating type was realized by PCR technique and all strains were MAT.
Acesso aberto (Open Access)
Criptococose em crianças no Estado do Pará, Brasil
(1999-10) CORRÊA, Maria do Perpétuo Socorro Costa; OLIVEIRA, Eliseth Costa; DUARTE, Rosineide Roseli Barros Seixas; PARDAL, Pedro Pereira de Oliveira; OLIVEIRA, Flávio de Mattos; SEVERO, Luiz Carlos
Relatam-se 19 casos de criptococose em crianças, diagnosticados em Belém, PA. Em nove pacientes a variedade do agente etiológico foi estudada e identificada como Cryptococcus neoformans var. gattii. A média de idade destes pacients foi 7,8 anos (variação, 5-13 anos). Havia 5 meninas e 4 meninos (razão, 1,25:1). Cinco foram a óbito em três meses apesar do tratamento com anfotericina B (associada com fluconazol 3 ou fluocitosina 1). São comentados a existência de áreas de alta endemia da infecção por var. gattii no Pará e a gravidade da doença causada por essa variedade fúngica.
Acesso aberto (Open Access)
Primary endemic Cryptococcosis gattii by molecular type VGII in the state of Pará, Brazil
(2008-12) SANTOS, Wallace Raimundo Araujo dos; MEYER, Wieland; COSTA, Solange do Perpétuo Socorro Evangelista; TRILLES, Luciana; NASCIMENTO, José Luiz Martins do; SOUSA, Rita Catarina Medeiros; MORALES, Bernardina Penarrieta; BEZERRA, Cláudia de Carvalho Falci; MACÊDO, Regina Célia Lima de; FERREIRA, Silvana O.; BARBOSA, Gláucia Gonçalves; PEREZ, Mauricio de Andrade; NISHIKAWA, Marília Martins; LAZÉRA, Márcia dos Santos
In order to study the infectious agents causing human disseminated cryptococcosis in the state of Pará, North Brazil, 56 isolates of Cryptococcusspp. (54 isolated from cerebral spinal fluid and two from blood cultures) from 43 cases diagnosed between 2003-2007 were analysed. The species were determined through morphological and physiological tests and genotypes were determined by URA5-RFLP and PCR-fingerprinting (wild-type phage M13). The following species and genotypes were identified: Cryptococcus neoformans VNI (28/56, 50%), Cryptococcus gattii VGII (25/56, 44.64%) and C. gattii VGI (3/56, 5.26%). The genotype VNI occurred in 12 out of 14 HIV-positive adults, whereas the genotype VGII occurred in 11 out of 21 HIV-negative adults (p < 0.02, OR = 6.6 IC95% 0.98-56.0). All patients less than 12 years old were HIV negative and six cases were caused by the VGII genotype, one by the VGI and one by VNI. Therefore, endemic primary mycosis in HIV-negative individuals, including an unexpectedly high number of children, caused by the VGII genotype deserves further study and suggests the need for surveillance on cryptococcal infection in the state of Pará, Eastern Amazon.