Primeira descrição da caracterização fenotípica e susceptibilidade in vitro a drogas de leveduras do gênero Cryptococcus spp isoladas de pacientes HIV positivos e negativos, Estado de Mato Grosso / First description of phenotypic profile and in vitro drug susceptibility of Cryptococcus spp yeast isolated from HIV-positive and HIV-negative patients in State of Mato Grosso

Foram avaliados 37 isolados de 10 pacientes HIV negativos e 26 positivos, em Mato Grosso. Exame direto, cultura e quimiotipagem de espécies foram realizados. Cetoconazol, itraconazol, voriconazol, fluconazol e anfotericina B foram avaliados. Foram identificadas 37 leveduras do gênero Cryptococcus spp sendo 26 de pacientes HIV- positivos (25 Cryptococcus neoformans e um Cryptococcus gattii) e 10 de HIV- negativos (cinco Cryptococcus neoformans e cinco Cryptococcus gattii). Considerando isolados clínicos (Cryptococcus neoformans) de HIV positivos observou-se resistência (8 por cento e 8,7 por cento) e susceptibilidade dose-dependência (20 por cento e 17,4 por cento) para fluconazol e itraconazol respectivamente. Para isolados de Cryptococcus neoformans oriundos de pacientes HIV negativos, observou-se susceptibilidade dose-dependência (40 por cento) ao fluconazol. Os isolados de Cryptococcus gattii provenientes de pacientes HIV- negativos mostraram-se susceptíveis a todos os antifúngicos, exceto um isolado de Cryptococcus gattii que foi susceptível dose-dependente ao fluconazol (20 por cento). O isolado proveniente do paciente HIV- positivo demonstrou resistência ao fluconazol (CIM > 256µg/mL) e itraconazol (CIM=3µg/mL).

Thirty-seven isolates from 10 HIV-negative and 26 HIV-positive patients in Mato Grosso were evaluated. Direct examination, culturing and chemotyping of species were performed. Ketoconazole, itraconazole, voriconazole, fluconazole and amphotericin B were evaluated. Thirty-seven yeasts of Cryptococcus spp were identified, of which 26 were from HIV-positive patients (25 Cryptococcus neoformans and one Cryptococcus gattii) and 10 from HIV-negative patients (five Cryptococcus neoformans and five Cryptococcus gattii). The Cryptococcus neoformans clinical isolates from HIV-positive patients showed resistance (8 percent and 8.7 percent) and dose-dependent susceptibility (20 percent and 17.4 percent) to fluconazole and itraconazole, respectively. Among the Cryptococcus neoformans isolates from HIV-negative patients, there was dose-dependent susceptibility (40 percent) to fluconazole. Cryptococcus gattii isolates from HIV-negative patients were shown to be susceptible to all antifungal agents, except for one isolate of Cryptococcus gattii that showed dose-dependent susceptibility to fluconazole (20 percent). The Cryptococcus gattii isolate from an HIV-positive patient showed resistance to fluconazole (MIC > 256 »g/ml) and itraconazole (MIC = 3 »g/ml).

Micoses sistêmicas: fatores associados ao óbito em pacientes com infecção pelo vírus da imunodeficiência humana, Cuiabá, Estado de Mato Grosso, 2005-2008 / Systemic mycosis: factors associated with death among patients infected with the human immunodeficiency virus, Cuiabá, State of Mato Grosso, Brazil, 2005-2008

A prevalência de micose sistêmica entre 1.300 pacientes portadores de HIV/Aids de Cuiabá, Mato Grosso foi de 4,6 por cento, no período de 2005-2008. As espécies de fungos isoladas foram o Cryptococcus neoformans (50 por cento), Cryptococcus gattii (1,6 por cento), Cryptococcus spp (6,6 por cento), Histoplasma capsulatum (38,3 por cento) e Paracoccidioides brasiliensis (3,3 por cento). Óbito foi registrado em 32 (53,3 por cento) pacientes, sendo a criptococose a principal causa. A contagem de linfócitos T CD4+ foi baixa e semelhante entre os pacientes que sobreviveram ou faleceram por micose sistêmica. O etilismo (OR:8,2; IC95 por cento: 1,4-62,1; p=0,005) e o nível médio de desidrogenase lática [758 (182) U/L vs 416 (268) U/L; p<0,001] foram as características independentemente associadas ao óbito dos pacientes do estudo. Os resultados mostram alta letalidade por micoses sistêmicas em pacientes portadores de HIV/Aids de Cuiabá e sugerem que características clínico-laboratoriais tais como o etilismo e a elevação precoce da desidrogenase lática podem ser fatores relacionados ao pior prognóstico nessas condições.

Between 2005 and 2008, the prevalence of systemic mycosis among 1,300 HIV/AIDS patients in Cuiabá, Mato Grosso, was 4.6 percent. The fungus species isolated were Cryptococcus neoformans in 50 percent, Cryptococcus gattii in 1.6 percent, Cryptococcus spp in 6.6 percent, Histoplasma capsulatum in 38.3 percent and Paracoccidioides brasiliensis in 3.3 percent. Death was recorded in the cases of 32 patients (53.3 percent), and cryptococcosis was the main cause. The CD4+ T lymphocyte count was low and similar among patients who survived or died due to systemic mycosis. The factors independently associated with the deaths of these patients were alcoholism (OR: 8.2; 95 percent CI: 1.4-62.1; p = 0005) and the mean level of lactate dehydrogenase [758 (182) U/l vs. 416 (268) U/l; p < 0001]. The findings showed that systemic mycosis was highly lethal among the patients with HIV/AIDS in Cuiabá and suggested that clinical-laboratory characteristics such as alcoholism and early elevation of lactate dehydrogenase may be factors relating to worse prognosis under these conditions.

Hepatitis B virus screening in contacts of blood donors with antibodies against core protein (anti-HBc), but without surface antigen (HBsAg)

To increase blood safety Brazil introduced screening for anti-HBc among blood donors in 1993. There was a decrease in the hepatitis B virus (HBV) transmission, but this measure identified a great number of HBsAg-negative, anti-HBc-positive donors. Surveillance policy determines that contacts of HBV carriers should be screened to HBV markers, but there is no recommendation about how to guide contacts of HBsAg-negative, anti-HBc-positive donors. Aiming to evaluate whether the contacts of this group are at greater risk for HBV infection, a cross-sectional study was performed to compare prevalence of HBV infection between contacts of HBsAg-positive blood donors (group I) and contacts of HBsAg-negative, anti-HBc-positive donors (group II). Contacts were submitted to a questionnaire and blood tests for HBV markers. In group I (n = 143), 53 (37.1 percent) were anti-HBc-positive and 11 (7.7 percent) were HBsAg-positive. In group II (n = 111), there were 9 and 0.9 percent, respectively. HBV exposure was associated with group I, sexual activity, blood transfusion, being one of the donor's parents, and living for more than ten years with the donor. Regarding the families as sample units, it was more common to find at least one member with HBV markers (p < 0.05) among the families of group I compared to group II. Contacts of HBsAg-negative, anti-HBc-positive individuals presented a much lower risk of having already been exposed to HBV and there is no need to screen them for HBV in low to moderate prevalence populations.

Dapsone syndrome with acute renal failure during leprosy treatment: case report

Dapsone syndrome is a rare hypersensitivity reaction to dapsone and is characterized by high fever, papular or exfoliative dermatitis, progressing to liver toxicity and generalized lymphadenopathy, resembling a mononucleosis infection. We report a patient who developed acute renal failure, as well as other complications characteristic of dapsone syndrome, during leprosy treatment. Renal involvement had not been previously described as a dapsone syndrome feature.

Proguanil plus sulfamethoxazole in the treatment of uncomplicated Plasmodium falciparum malaria.

In a malaria endemic area of Brazil where P. falciparum is highly resistant to chloroquine and Fansidar, we conducted an in vivo study to evaluate the therapeutic response of proguanil plus sulfametoxazole against Plasmodium falciparum malaria. Twenty-five adult subjects with uncomplicated P. falciparum malaria received supervised drug administration and were followed for 28 days in an inpatient hospital or in a malaria free-transmission area. The therapeutic regimen was proguanil 100 mg BID plus sulfamethoxazole 1,000 mg BID for 7 days. Of those who took all medications (n=21), 17 (81%) were cured. Recrudescent parasitemia during follow-up occurred in four (19%) patients on days 14, 19, 20 and 21 after beginning of treatment. The remaining four (16%) subjects did not complete their therapeutic regimen because the incidence of side effects. Considering the shortage of falciparum malaria therapeutic options and the urgent need for new regimens to deal with the spread of drug resistant P. falciparum, one might consider the study results as a lead to study analogous compounds, hopefully with fewer adverse reactions.

Imunoblot como teste suplementar para detecção de anticorpos contra o vírus da hepatite C em doadores de sangue / Immunoblot as a supplemental test to detect antibodies to hepatitis C virus in blood donors

Supplemental tests using Immunoblot are recommended to improve specificity of anti-HCV by ELISA. In Brazil immunoblot is not officially recommended. Aiming to identify EIA false-positive rate 70 positive EIA anti-HCV blood donors were submitted to 3rd generation immunoblot at Hemocentro of Mato Grosso State where polymerase chain reaction tests are not performed. There were 44 (62.9) immunoblot-positive, 22 (31.4) negative and 4 (5.7) indeterminate. Anti-HCV immunoblot can distinguish blood donors with false-positive ELISA from those who need medical assessment. Our data suggest that immunoblot could be useful in Brazilian blood banks where molecular biology tests are not available.

Hepatite Delta no Estado de Mato Grosso: apresentaçäo de cinco casos / Hepatitis Delta in the tate of Mato Grosso, Brazil: report of five cases

Cinco casos graves de infeccao pelos virus das hepatites B e D foram diagnosticados em jovens oriundos do norte do Mato Grosso, onde e comum a ocorrencia de hepatite B, mas nao de hepatite D. A proximidade com os Estados do Acre e do Amazonas e a migracao interna podem explicara introducao do virus da hepatite D na regiao. Os autores salientam a necessidade de manter vigilancia epidemiologica para casos de hepatite D na regiao

Disseminação linfática na endometriose colorretal / Lymphatic dissemination in colorectal endometriosis

A 40-year-old female patient presented abdominal pain during her periods and progressing constipation during the last 6 years. Retosigmoidoscopy showed a stenotic lesion 14cm above the anal verge. The patient underwent a retosigmoidectomy and the specimen was sent to histopathologic exam. The diagnose was endometriosis with the involvement of the colon and rectum, associated with dissemination of the endometrial cells by the lymph nodes. The patient recovered well and was discharged on the 6th postoperative day. It is commented on the rarity of the lymphatic dissemination in these cases and according to the reviewed literature, this is the 5th case reported. Thus, dissemination of the disease to extra-abdominal sites could possibly occur by this route. Therefore, pathologists should carefully exam the lymph nodes of the mesocolon in these specimens because findings of endometrial "metastasis" may be present.