Ana Maria de Brito

Tendências da epidemia de Aids no Brasil após a terapia anti-retroviral

OBJETIVO: A terapia anti-retroviral disponivel no Brasil a partir de 1996, modificou o curso da epidemia de Aids, alterando sua evolucao e tendencias. Nesse sentido, o estudo teve por objetivo avaliar a epidemia da Aids no Brasil, nos seus aspectos epidemiologicos. METODOS: Estudo realizado a partir de bases de dados do Ministerio da Saude que caracterizavam a evolucao temporal da Aids nas macrorregioes brasileiras, de 1990 a 2003. Foram utilizados modelos de regressao exponencial, ajustados a serie temporal de 1990 a 1996 e estimados valores esperados para toda a serie. RESULTADOS: O percentual de internacoes nao se modificou no tempo, mas ocorreu diminuicao de hospitalizacoes entre os usuarios de terapia anti-retrovial. Houve um incremento de 2,7 vezes no numero de individuos em uso da terapia, de 1997 a 2003. Incidencia e mortalidade apresentaram crescimentos uniformes ate 1995, em todas as regioes. A partir de 1996, verificou-se uma reducao progressiva da mortalidade, embora a incidencia continue crescendo. Em todas as regioes, exceto a Norte, as incidencias esperadas foram maiores do que as observadas nos ultimos anos, embora as diferencas somente tenham atingido niveis de significância estatistica nas regioes Sudeste e Centro-Oeste. CONCLUSOES: As mudancas observadas no perfil de morbi-mortalidade da epidemia de Aids no Brasil poderiam ser explicadas pelo amplo acesso a terapia anti-retroviral. Tal fato representou um impacto importante sobre a mortalidade por HIV/Aids, porem, outros fatores devem ser considerados, como idade da epidemia, medidas de prevencao, conhecimento sobre HIV/Aids e anos de escolaridade.

Trends in maternal-infant transmission of AIDS after antiretroviral therapy in Brazil

OBJECTIVE The increase in the number of AIDS cases among women has led to an increase in the maternal-infant transmission of human acquired immunodeficiency virus. Measures for the control of this type of transmission were implemented in Brazil in 1996. The aim of the present study was to analyze time trends in maternal-infant transmission of AIDS among Brazilian children. METHODS The present study included children born in Brazil between 1990 and 2001. We used the database of notified AIDS cases in children 13 years of age or younger between 1990 and 2004. Exponential regression models adjusted to the time series provided the annual variation rates and observed and expected values for the period. RESULTS We found a significant increasing trend for cases born prior to the year in which anti retroviral therapy was introduced, with an increase rate of about 12% (t<0.003) per year. Rates from different states ranged from 5.9% to 31%. The analysis of expected and observed cases for each of the countrys five Regions showed a reduction in the number of cases among children born from 1997 onwards, with a progressive year-to-year reduction. The number of notified cases among children born in 2001 was less than 10% the number of expected cases. CONCLUSIONS The results obtained suggest a favorable response to the implementation of policies for the prevention of maternal-infant HIV transmission in Brazil, as observed in other parts of the world.

Regional patterns of the temporal evolution of the AIDS epidemic in Brazil following the introduction of antiretroviral therapy

We examined the characteristics of the AIDS epidemic in the northeastern region of Brazil, comparing it to the epidemic in Brazil as a whole, and to the state of São Paulo, with respect to the temporal evolution of morbidity and mortality during the period 1990 to 1999, using information from communicable disease reports and mortality records. Since 1996, the incidence rate of AIDS in adults in Brazil as a whole and in São Paulo has been showing a trend towards stability, whereas in the Brazilian northeast the incidence rates of the disease continue to grow. In the northeast, sexual transmission is responsible for more than 80% of cases, injectable drug users (IDU) comprising only a small percentage of cases. There is a greater incidence of AIDS among groups with lower educational levels throughout the country. The comparative analysis of cases of AIDS and of deaths from AIDS shows growth, both in the number of cases and in the number of deaths; however, from 1996 onwards there has been a progressive reduction in the number of deaths in all regions analyzed. With respect to the incidence of cases of the disease acquired by vertical transmission, a significant growth trend can be seen in all regions for cases born in the period 1990-6, but in 1997 temporal analysis showed evidence of a reduction in this growth. In conclusion, temporal changes have occurred in the AIDS epidemic in Brazil, which has been showing a trend towards stability since 1996, when potent ARV therapy was introduced. However, this deceleration is not homogenous throughout all the regions.

Antiretroviral resistance in individuals presenting therapeutic failure and subtypes of the human immunodeficiency virus type 1 in the Northeast Region of Brazil

This study aimed to analyze human immunodeficiency virus (HIV) mutation profiles related to antiretroviral resistance following therapeutic failure, and the distribution of hiv subtypes in the Northeast Region of Brazil. A total of 576 blood samples from AIDS patients presenting therapeutic failure between 2002 and 2004 were analyzed. The genotyping kit viroSeq was used to perform viral amplification in order to identify mutations related to hiv pol gene resistance. An index of 91.1% of the patients presented mutations for nucleoside reverse transcriptase inhibitors (nrti), 58.7% for non-nucleoside reverse transcriptase inhibitors (nnrti), and 94.8% for protease inhibitors (pi). The most prevalent mutations were 184V and 215E for nrti, 103N and 190A for nnrti. Most mutations associated with PIs were secondary, but significant frequencies were observed in codons 90 (25.2%), 82 (21.1%), and 30 (16.2%). The resistance index to one class of antiretrovirals was 14%, to two classes of antiretrovirals 61%, and to three classes 18.9%. Subtype B was the most prevalent (82.4%) followed by subtype F (11.8%). The prevalence of mutations related to nrti and nnrti was the same in the two subtypes, but codon analysis related to PI showed a higher frequency of mutations in codon 63 in subtype B and in codon 36 in subtype F. The present study showed that there was a high frequency of primary mutations, which offered resistance to nrti and nnrti. Monitoring patients with treatment failure is an important tool for aiding physicians in rescue therapy.

Fatores associados à interrupção de tratamento anti-retroviral em adultos com AIDS. Rio Grande do Norte, Brasil, 1999 - 2002

BACKGROUND: The purpose of this study is to determine factors associated to the interruption of antiretroviral treatment in adults with AIDS in the State of Rio Grande do Norte, Brazil. METHODS: This was a population-based study, using data from the States sources of vital statistics. Interruption was calculated using data on the number of programmed visits to the pharmacies, taking into account the date of the first prescription. It was considered that patients had adhered to the treatment if they came to at least 80% of the programmed visits. RESULTS: The overall percentage for non interruption of the antiretroviral therapy was 64.1%. No association was found with the following: gender, type of exposure, residence, nor with the type of antiretroviral combination prescribed. After multivariate analysis, significant associations continued to be found between interruption and in-hospital stay, use of drugs, psychiatric treatment, low level of education and age ranging from 25 to 34 years. CONCLUSIONS: These results point towards significant associations between interruption of antiretroviral treatment and the beginning of antiretroviral therapy during the in-hospital stay, the use of legal or illegal drugs, a history of psychiatric treatment, low level of education, and age ranging from 25 to 34 years.

Mother-child anemia in the State of Pernambuco, Brazil

Prevalence of anemia and associated factors were analyzed in mothers (n = 1,022) and their children under 5 years of age (n = 1,242) in Pernambuco State, Brazil, 2006. This was a cross-sectional population-based study with a probabilistic sample in an urban and rural area. Anemia was diagnosed by hemoglobin level (children < 11.0 g/dL, women < 12.0 g/dL) using HemoCue. Univariate and multivariate analyses used Poisson regression with robust adjustment of standard error, adopting a hierarchical model for determination in children with anemia as the outcome. This same procedure was not applied to mothers because of the small number of associated factors in the univariate analyses. Anemia prevalence was 16.4% in mothers and 34.4% in children. Anemic as compared to non-anemic mothers showed a prevalence ratio of 1.44 (95%CI: 1.21-1.72) for anemia in their children, maintaining similar values in the adjusted model (PR = 1.39: 95%CI: 1.16-1.66). Anemia prevalence in children was double that of mothers, with the final model showing only one common factor: per capita family income.

Factors Associated with Low Levels of HIV Testing among Men Who Have Sex with Men (MSM) in Brazil

The aim of this study was to assess risk factors associated with low levels of HIV testing among MSM recruited through respondent driven sampling (RDS) in Brazil. Of 3,617 participants, 48.4% had never tested previously for HIV. A logistic model indicated that younger age, lower socioeconomic class, education, poor HIV/AIDS knowledge, no history of cruising, and having been tested during the study were characteristics independently associated with low levels of previous HIV testing. The HIV testing rate among MSM in Brazil is still low in spite of the availability of a large number services providing universal and free access to HIV/AIDS diagnosis and treatment. To respond to low utilization, the authors propose a higher priority for testing for key populations such as MSM, expanded education, expanding testing sites and a welcoming and nonjudgmental environment in health services.

Fatores associados à não adesão aos antirretrovirais em adultos com AIDS nos seis primeiros meses da terapia em Salvador, Bahia, Brasil

O controle da replicacao viral e essencial na terapia antirretroviral altamente potente (TARV) e a adesao ao tratamento e o fundamento para esse controle. Fatores individuais e externos influenciam a adesao aos antirretrovirais (ARV). Estudo transversal para investigar fatores associados a nao adesao a TARV, em individuos com AIDS em Salvador, Bahia, Brasil, com idade ≥ 13 anos e primeira prescricao em 2009. Dados coletados em prontuarios e registros da farmacia. Dos 216 pacientes, 65,3% eram homens; idade media 37,8 ± 9,5 anos, solteiros 67,9%; heterossexuais 64%; > 8 anos de estudo 65,3%, etilistas 61,5% e nao relatou tabagismo 75,1% ou uso de drogas 93,7%. Iniciaram a TARV com TCD4+ < 350 celulas/mm3 94%, 61,8% sintomaticos e 68,4% apresentaram reacao adversa ao medicamento. Prevalencia de nao adesao 25%. Variaveis associadas: maior tempo entre o diagnostico de infeccao pelo HIV e a AIDS (aOR = 3,9), reacao adversa ao medicamento (aOR = 2,4), idade menor que 34 anos (aOR = 2,2), menos que 8 anos de estudo (aOR = 2,2) e uso de drogas (aOR = 2,6). A alta taxa de nao adesao e um problema importante nos seis primeiros meses da TARV.The control of viral replication is essential in the highly active antiretroviral therapy (HAART), and adherence to therapy is instrumental for such control. Individual and external factors influence adhesion to the use of antiretroviral (ARV) drugs. This is a cross-sectional study to investigate factors associated with non-adherence to HAART in AIDS patients in Salvador, Bahia State, Brazil, with age ≥ 13 years and first prescription in 2009. Data was collected from patient charts and pharmacy records. From a total of 216 patients, 65.3% were males; mean age 37.8 ± 9.5 years; single, 67.9%; heterosexual, 64%; more than 8 years of school education, 65.3%; alcohol users, 61.5%; non-smokers, 75,1% or non-illicit drug users, 93.7%. A proportion of 94% started ARV therapy with TCD4+ < 350 cells/mm3; 61.8% were symptomatic; and 68.4% had an adverse drug reaction. The prevalence of non-adherence was 25%. The variables associated were: longer time between HIV infection and AIDS (aOR = 3.9), adverse drug reaction (aOR = 2.4), under 34 years of age (aOR = 2.2), less than 8 years of school education (aOR = 2.2) and illicit drugs use (aOR = 2.6). A high-non-adherence rate is an important problem within the first six months of HAART.

Primary resistance of HIV to antiretrovirals among individuals recently diagnosed at voluntary counselling and testing centres in the metropolitan region of Recife, Pernambuco

Determining the prevalence and type of antiretroviral (ARV) resistance among ARV-naïve individuals is important to assess the potential responses of these individuals to first-line regimens. The prevalence of primary resistance and the occurrence of recent infections among individuals with human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS) were identified among recently diagnosed patients at five sexually transmitted disease/AIDS testing and counselling centres in the metropolitan region of Recife (RMR), Pernambuco, Brazil, between 2007-2009. One-hundred and eight samples were analysed using the Calypte® BED assay. Males predominated (56%), as did patients aged 31-50 years. Twenty-three percent presented evidence of a recent HIV infection. The median CD4+ T lymphocyte count was 408 cells/mm³ and the median viral load was 3.683 copies/mL. The prevalence of primary resistance was 4.6% (confidence interval 95% = 1-8.2%) based on criteria that excluded common polymorphisms in accordance with the surveillance drug resistance mutation criteria. The prevalence of resistance to non-nucleoside reverse transcriptase, nucleoside/nucleotide reverse transcriptase and protease inhibitors were 3.8%, 1.5% and 0.8%, respectively. Fifty-seven percent of strains were from clade B, 37.7% were clade F and 3.1% were clade C; there were no statistically significant differences with respect to resistance between clades. Recent infection tended to be more common in men (p = 0.06) and in municipalities in the south of the RMR (Jaboatão dos Guararapes and Cabo de Santo Agostinho) (p = 0.046). The high prevalence of recent infection and the high prevalence of non-B strains in this poor Brazilian region merit further attention.

Recent HIV infection rates among HIV positive patients seeking voluntary counseling and testing centers in the metropolitan region of Recife - Pe, Brazil

UNLABELLED The BED capture enzyme immunoassay test makes it possible to determine whether individuals were recently infected with HIV. OBJECTIVE In this study, the overall HIV and recent infections prevalences were determined at five Voluntary Counseling and Testing (VCT) centers, in the Metropolitan Region of Recife, Northeastern of Brazil. MATERIAL AND METHODS A cross-sectional study was conducted among users of five VCTs in the metropolitan region of Recife between July 2007 and April 2009. Out of the individuals who tested positive for HIV, 169 were analyzed to assess the prevalence of recent infection by means of the BED-CEIA (BED-Calypte®). RESULTS Out of 46,696 individuals tested 916 (1.96%) turned out positive for HIV infection The highest prevalence was in Recife (3.9%). The prevalence was higher among males (3.93%), and men who have sex with men (MSM) (12.4%). The frequency of recent infections among the 169 subjects evaluated was 23.7%. Recent infections were more common among individuals under 25 years of age. There was slight predominance of men and higher frequency of heterosexuals in both groups, but still a significant portion of MSM (33%). Subtype B predominated, followed by a high proportion of subtype F. CONCLUSIONS Recent infection occurs mainly among young individuals and heterosexuals, despite a significant proportion of recent infection among MSM. These results suggest that preventive actions aimed at the MSM community remains a challenge and efforts focusing this group should continue to be a priority.