Rita Medeiros

Primary endemic Cryptococcosis gattii by molecular type VGII in the state of Pará, Brazil.

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.

Zika virus epidemic in Brazil. I. Fatal disease in adults: Clinical and laboratorial aspects

BACKGROUNDnZika virus (ZIKV) was first detected in Brazil in May 2015 and the country experienced an explosive epidemic. However, recent studies indicate that the introduction of ZIKV occurred in late 2013. Cases of microcephaly and deaths associated with ZIKV infection were identified in Brazil in November, 2015.nnnOBJECTIVESnTo determine the etiology of three fatal adult cases.nnnSTUDY DESIGNnHere we report three fatal adult cases of ZIKV disease. ZIKV infection in these patients was confirmed by cells culture and/or real-time reverse transcriptase polymerase chain reaction (RT-qPCR) and by antigen detection using immunohistochemical assay. Samples of brain and other selected organs taken at autopsy from three patients were also analyzed by histopathological and immunohistological examination.nnnRESULTSnThe first patient, a 36-year-old man with lupus and receiving prednisone therapy, developed a fulminant ZIKV infection. At autopsy, RT-qPCR of blood and tissues was positive for ZIKV RNA, and the virus was cultured from an organ homogenate. The second patient, a previously healthy female, 16 years of age, presented classic symptoms of Zika fever, but later developed severe thrombocytopenia, anemia and hemorrhagic manifestations and died. A blood sample taken on the seventh day of her illness was positive RT-PCR for ZIKV RNA and research in the serum was positive for antinuclear factor fine speckled (1/640), suggesting Evans syndrome (hemolytic anemia an autoimmune disorder with immune thrombocytopenic purpura) secondary to ZIKV infection. The third patient was a 20-year-old woman hospitalized with fever, pneumonia and hemorrhages, who died on 13days after admission. Histopathological changes were observed in all viscera examined. ZIKV antigens were detected by immunohistochemistry in viscera specimens of patients 1 and 3. These three cases demonstrate other potential complications of ZIKV infection, in addition to microcephaly and Guillain-Barre syndrome (GBS), and they suggest that individuals with immune suppression and/or autoimmune disorders may be at higher risk of developing severe disease, if infected with ZIKV.

Diagnosis of human rabies cases by polymerase chain reaction of neck-skin samples

Rapid diagnosis of rabies in suspected human cases influences post-exposure prophylaxis for potential contacts of the patient and ensures appropriate patient management. Apart from the central nervous system (CNS), rabies virus (RABV) is usually present in small sensory nerves adjacent to hair follicles of infected humans. We used an RT-PCR, with primers targeted to the 3 terminal portion of the nucleoprotein gene (N), to test neck-skin samples of nine patients who had rabies in order to validate a diagnostic method that could serve as an additional tool for rabies diagnosis, particularly in antemortem samples. Six of eight postmortem samples were found to be positive for rabies by RT-PCR, and one of two samples collected antemortem was positive with this same technique. Results were confirmed by DNA sequencing; this validates RT-PCR and neck-skin as a suitable technique and type of sample, respectively, for use in the diagnosis of human rabies. RT-PCR applied to neck-skin biopsies could allow early diagnosis and lead to more effective rabies treatment.

Perfil clínico-epidemiológico de pacientes infectados pelo HTLV-1 em Belém/Pará

ObjectiveThe clinical-epidemiological profile of patients with HTLV-1 in Belem, Para state, Brazil was investigated describing the characteristics of these patients at an outpatient service of the Clinical and Epidemiologic Laboratory of Endemic Diseases - LCEDE from the Tropical Medicine Center - NMT of the Federal University of Para - UFPA.MethodologyIt was a descriptive, cross-sectional study with data collected from the records of HTLV-1 patients from 2000 to 2012. Descriptive analysis used Epi Info 3.2.5 software.ResultsOf the 182 patients, 35.2% were male and 64.8% female, with a predominance of married individuals (47.8%), approximately 73.6% were from Belem. Among the symptomatic patients, 51% presented neurological symptoms, 21% dermatological complaints, 18% rheumatologic complaints, and 10% autonomic complaints. Among the patients with neurological symptoms, 16 (39%) were diagnosed with HAM/TSP.ConclusionThere is predominance of females, aged 40-49 years, married, with informal jobs, from Belem, with neurological sings and regular return to medical visits.

Persistence of Rabies Virus-Neutralizing Antibodies after Vaccination of Rural Population following Vampire Bat Rabies Outbreak in Brazil

Background Animal control measures in Latin America have decreased the incidence of urban human rabies transmitted by dogs and cats; currently most cases of human rabies are transmitted by bats. In 2004–2005, rabies outbreaks in populations living in rural Brazil prompted widespread vaccination of exposed and at-risk populations. More than 3,500 inhabitants of Augusto Correa (Pará State) received either post-exposure (PEP) or pre-exposure (PrEP) prophylaxis. This study evaluated the persistence of rabies virus-neutralizing antibodies (RVNA) annually for 4 years post-vaccination. The aim was to evaluate the impact of rabies PrEP and PEP in a population at risk living in a rural setting to help improve management of vampire bat exposure and provide additional data on the need for booster vaccination against rabies. Methodology/Principal Findings This prospective study was conducted in 2007 through 2009 in a population previously vaccinated in 2005; study participants were followed-up annually. An RVNA titer >0.5 International Units (IU)/mL was chosen as the threshold of seroconversion. Participants with titers ≤0.5 IU/mL or Equivalent Units (EU)/mL at enrollment or at subsequent annual visits received booster doses of purified Vero cell rabies vaccine (PVRV). Adherence of the participants from this Amazonian community to the study protocol was excellent, with 428 of the 509 (84%) who attended the first interview in 2007 returning for the final visit in 2009. The long-term RVNA persistence was good, with 85–88.0% of the non-boosted participants evaluated at each yearly follow-up visit remaining seroconverted. Similar RVNA persistence profiles were observed in participants originally given PEP or PrEP in 2005, and the GMT of the study population remained >1 IU/mL 4 years after vaccination. At the end of the study, 51 subjects (11.9% of the interviewed population) had received at least one dose of booster since their vaccination in 2005. Conclusions/Significance This study and the events preceding it underscore the need for the health authorities in rabies enzootic countries to decide on the best strategies and timing for the introduction of routine rabies PrEP vaccination in affected areas.

Prevalence of human papillomavirus (HPV) in Belém, Pará State, Brazil, in the oral cavity of individuals without clinically diagnosable injuries

This cross-sectional study aimed to determine HPV prevalence in the oral cavity of individuals without clinically diagnosable lesions and to identify the respective HPV types. A total of 166 samples were analyzed from patients 18 years or older in the State of Pará, Brazil. Samples were collected by sterile brush scraping in the oral cavity. HPV detection used polymerase chain reaction (PCR). Infected samples were typed as HPV 6, 11, 16, 18, 31, 33, 35, 52, and 58. HPV was present in 40 samples (24.1%). Three samples (7.5%) were positive for HPV 6, five (12.5%) for HPV 18, and one (2.5%) for HPV 58.Trata-se de um estudo transversal com o objetivo de verificar a prevalencia do HPV na cavidade oral de individuos sem lesoes clinicamente diagnosticaveis e quais sao os tipos encontrados neles. Foram analisadas 166 amostras em pacientes maiores de 18 anos de idade, residentes no Estado do Para, Brasil. As amostras foram coletadas por meio de raspado com escova esteril na cavidade oral. Para a deteccao da presenca do HPV, foi utilizada a tecnica da reacao em cadeia da polimerase (PCR). As amostras infectadas pelo HPV foram tipadas para HPV 6, 11, 16, 18, 31, 33, 35, 52 e 58. Os resultados encontrados indicaram a presenca de HPV em 40 amostras (24,1%). Tres amostras (7,5%) foram positivas para HPV 6; cinco (12,5%), para HPV 18; e uma (2,5%), para HPV 58.

Prevalência do papilomavírus humano (HPV) em Belém, Pará, Brasil, na cavidade oral de indivíduos sem lesões clinicamente diagnosticáveis

This cross-sectional study aimed to determine HPV prevalence in the oral cavity of individuals without clinically diagnosable lesions and to identify the respective HPV types. A total of 166 samples were analyzed from patients 18 years or older in the State of Pará, Brazil. Samples were collected by sterile brush scraping in the oral cavity. HPV detection used polymerase chain reaction (PCR). Infected samples were typed as HPV 6, 11, 16, 18, 31, 33, 35, 52, and 58. HPV was present in 40 samples (24.1%). Three samples (7.5%) were positive for HPV 6, five (12.5%) for HPV 18, and one (2.5%) for HPV 58.Trata-se de um estudo transversal com o objetivo de verificar a prevalencia do HPV na cavidade oral de individuos sem lesoes clinicamente diagnosticaveis e quais sao os tipos encontrados neles. Foram analisadas 166 amostras em pacientes maiores de 18 anos de idade, residentes no Estado do Para, Brasil. As amostras foram coletadas por meio de raspado com escova esteril na cavidade oral. Para a deteccao da presenca do HPV, foi utilizada a tecnica da reacao em cadeia da polimerase (PCR). As amostras infectadas pelo HPV foram tipadas para HPV 6, 11, 16, 18, 31, 33, 35, 52 e 58. Os resultados encontrados indicaram a presenca de HPV em 40 amostras (24,1%). Tres amostras (7,5%) foram positivas para HPV 6; cinco (12,5%), para HPV 18; e uma (2,5%), para HPV 58.

Incomplete myelopathy and human T cell lymphotropic virus type-1 (HTLV-1)

This was a cross-sectional prospective study. We performed a multivariate statistical analysis of the neurological signs and symptoms of patients infected with human T cell lymphotropic virus type 1 (HTLV-1) in an attempt to separate them into distinct groups and identify clinical-neurological manifestations that could differentiate the various profiles. The study was performed in the city of Belém (state of Pará), located in the Amazon region of Brazil, from 2014 to 2016. We determined muscle strength and tone, reflexes, sensations, sphincter function, gait, and the Expanded Disability Status Scale score among individuals with HTLV-I. We then used exploratory statistical methods in an attempt to find different profiles and establish distinct groups. We analyzed 60 patients with HTLV-1. The filtering of the data, performed with mixed PCA, gave rise to a streamlined database with the most informative data and suggested the formation of three statistically distinct groups: asymptomatic carriers (AC), mono/oligosymptomatic (MOS), and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSPd), AC and MOS (pu2009=u20090.002), AC and HAM/TSPd (pu2009<u20090.001), and HAM/TSPd and MOS (pu2009=u20090.001). The subsequent cluster analysis confirmed the formation of three clusters. The classification and regression tree demonstrated that altered gait was the most important variable for the classification of an individual with HAM/TSPd and that, in the absence of this impairment, hyperreflexia characterized MOS. The present study was able to separate patients infected by HTLV-1 into three clinical groups (AC, HAM/TSPd, and MOS) and identify clinical manifestations that could differentiate the various patient groups.

Using the International Classification of Functioning, Disability and Health as a tool for analysis of the effect of physical therapy on spasticity in HAM/TSP patients

INTRODUCTIONnThis study aimed to evaluate spasticity in human T-lymphotropic virus type 1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) patients before and after physical therapy using the International Classification of Functioning, Disability and Health (ICF).nnnMETHODSnNine subjects underwent physical therapy. Spasticity was evaluated using the Modified Ashworth Scale. The obtained scores were converted into ICF body functions scores.nnnRESULTSnThe majority of subjects had a high degree of spasticity in the quadriceps muscles. According to the ICF codes, the spasticity decreased after 20 sessions of physical therapy.nnnCONCLUSIONSnThe ICF was effective in evaluating spasticity in HAM/TSP patients.

La prevalencia del virus del papiloma humano (VPH) en Belém, Pará, Brasil, en la cavidad oral de los individuos sin lesiones clínicamente diagnosticables

This cross-sectional study aimed to determine HPV prevalence in the oral cavity of individuals without clinically diagnosable lesions and to identify the respective HPV types. A total of 166 samples were analyzed from patients 18 years or older in the State of Pará, Brazil. Samples were collected by sterile brush scraping in the oral cavity. HPV detection used polymerase chain reaction (PCR). Infected samples were typed as HPV 6, 11, 16, 18, 31, 33, 35, 52, and 58. HPV was present in 40 samples (24.1%). Three samples (7.5%) were positive for HPV 6, five (12.5%) for HPV 18, and one (2.5%) for HPV 58.Trata-se de um estudo transversal com o objetivo de verificar a prevalencia do HPV na cavidade oral de individuos sem lesoes clinicamente diagnosticaveis e quais sao os tipos encontrados neles. Foram analisadas 166 amostras em pacientes maiores de 18 anos de idade, residentes no Estado do Para, Brasil. As amostras foram coletadas por meio de raspado com escova esteril na cavidade oral. Para a deteccao da presenca do HPV, foi utilizada a tecnica da reacao em cadeia da polimerase (PCR). As amostras infectadas pelo HPV foram tipadas para HPV 6, 11, 16, 18, 31, 33, 35, 52 e 58. Os resultados encontrados indicaram a presenca de HPV em 40 amostras (24,1%). Tres amostras (7,5%) foram positivas para HPV 6; cinco (12,5%), para HPV 18; e uma (2,5%), para HPV 58.