Resumo Objetivo: Elaborar e analisar a validade e confiabilidade de um questionário para avaliar o conhecimento de médicos e enfermeiros da atenção primária sobre o tracoma. Métodos: Trata-se de um estudo metodológico de elaboração e análise de validade e confiabilidade de instrumento (questionário). Foram desenvolvidas as seguintes etapas: 1) identificação da literatura fonte atualizada sobre o tema; 2) elaboração dos itens do questionário pelos pesquisadores; 3) validação de conteúdo por experts; 4) validação de construto com aplicação do instrumento e análise de teste de hipóteses; 5) análise de consistência interna e; 6) análise de estabilidade temporal (teste-reteste). Resultados: Participaram da pesquisa 205 médicos e enfermeiros da atenção primária e 10 especialistas em oftalmologia e infectologia. O instrumento, inicialmente com 52 itens, ficou com 34 itens após todas as etapas. O instrumento mostrou-se capaz de discriminar adequadamente profissionais com maior e menor conhecimento, segundo o teste de hipóteses (p<0,001). O alfa de Cronbach foi de 0,86 e o teste-reteste registrou uma concordância superior a 60% para a maioria dos itens. Conclusões: O instrumento final apresentou validade e confiabilidade satisfatórios. Poderá ser um instrumento útil para aferir conhecimentos de profissionais da atenção primária sobre o tracoma e auxiliar na elaboração de estratégias educacionais para estes profissionais.

Abstract Objective: To develop and analyze the validity and reliability of a questionnaire to assess the knowledge of primary care physicians and nurses about trachoma. Methods: This is a methodological study of elaboration and analysis of validity and reliability of an instrument (questionnaire). The following steps were developed: 1) identification of updated source literature on the subject; 2) elaboration of the questionnaire items by the researchers; 3) content validation by experts; 4) construct validation with instrument application and hypothesis test analysis; 5) internal consistency analysis and; 6) temporal stability analysis (test-retest). Results: The study included 205 primary health care physicians and nurses and 10 specialists in ophthalmology and infectology. The instrument, initially with 52 items, was left with 41 items after all stages. The instrument was able to adequately discriminate professionals with greater and lesser knowledge, according to the hypothesis test (p <0.001). Cronbach's alpha was 0.86 and the test-retest recorded an agreement greater than 60% for most items. Conclusions: The final instrument presented satisfactory validity and reliability. It may be a useful tool to assess knowledge of primary health care professionals about trachoma and assisting in the development of educational strategies for these professionals.

Abstract INTRODUCTION: Trachoma is the leading cause of blindness in the world, especially in undeveloped countries, due to its association with poor socioeconomic and sanitation conditions. This study aimed to estimate the prevalence of trachoma among students from the Jequitinhonha Valley, Minas Gerais, one of the poorest regions in Brazil, and to identify associated factors. METHODS: This is a cross-sectional study that utilized clinical evaluation and a socioeconomic questionnaire applied to a random and representative sample of elementary school students from the Jequitinhonha Valley, Minas Gerais, Brazil. Participants underwent conjunctival scraping and direct immunofluorescence was used to confirm the presence of the bacteria. Five or more elementary bodies in the conjunctival scrape was considered a positive result. In the study, 36.6% positive samples were detected. A culture of the conjunctival scrape, considered to be the "gold standard", was not performed due to cost and complexity. Bivariate analyses were performed, followed by binary logistic regression analysis to define the associated variables. RESULTS: In the present study, 478 students comprised the sample. The prevalence of trachoma was 6.3% and was higher among students who lived in unfinished houses (no plastering, painting, flooring, and unfinished bathrooms) (OR, 2.27; 95% CI, 1.12-6.48) without sewage systems (OR = 9.49; 95% CI = 3.52-25.60) and studied in rural areas (OR, 3.37; 95% CI, 1.53-7.35). CONCLUSIONS: The prevalence of trachoma among the students aged 7 to 16 years old, from public and private schools, is not negligible and is especially associated with inadequate living conditions.

RESUMO O tracoma, tido equivocadamente como erradicado em nosso meio, encontra-se na lista de doenças negligenciadas. Trata-se da maior causa de cegueira evitável do mundo, sendo encontrado predominantemente nos países subdesenvolvidos. Diversos trabalhos têm demonstrado que esta doença atualmente se faz presente em todas as regiões do Brasil, o que evidencia que tanto o governo (nas esferas federal, estadual e municipal), quanto a academia devem continuar a considerar o tracoma entre as causas de cegueira em nosso meio. Neste trabalho, procurou-se levantar a prevalência de tracoma entre as crianças de sete a quinze anos matriculadas nas escolas da rede pública do município de Turmalina, MG. A pesquisa foi realizada neste município, situado no Vale do Jequitinhonha, considerando que existem nele regiões com populações em situação de alta vulnerabilidade social, portanto com características propícias para o surgimento da doença. Participaram da pesquisa seis médicos e onze enfermeiros com atuação na atenção primária, capacitados e padronizados para tal. Os profissionais de saúde realizaram o exame de 635 estudantes entre 7 a 15 anos nas escolas públicas de Turmalina, MG. Os estudantes com diagnóstico clínico de tracoma foram submetidos à raspagem de conjuntiva com swab e o material enviado para análise laboratorial. Todos os estudantes diagnosticados com tracoma foram tratados no Sistema Único de Saúde (SUS). Os dados coletados foram analisados com auxílio do software Statistical Package for Social Sciences, IBM Inc., USA - SPSS, versão 22.0. Entre os estudantes foi encontrada uma prevalência do tracoma de 4,7%, com predomínio nas áreas rurais.

ABSTRACT Trachoma has been mistakenly assumed as having been eradicated, but is on the list of neglected diseases. It is the leading cause of preventable blindness in the world, being found predominantly in developing countries. Several studies have shown that this disease is currently present in all regions of Brazil, which shows that both the government (at the federal, state and municipal levels) and academia must continue to treat trachoma as one of the causes of blindness. In this study, we sought to identify the prevalence of trachoma among schoolchildren aged between seven and 15 years from public schools in the municipality of Turmalina, Minas Gerais state. The survey was conducted in this municipality, located in the Jequitinhonha Valley, a region that contains populations who live in situations of high social vulnerability, and thus display the characteristics that are conducive to the emergence of the disease. The participants were six doctors and 11 nurses working in primary healthcare, trained and standardized to do so. Health professionals examined 635 students aged 7-15 years in the public schools of Turmalina. Students with a clinical diagnosis of trachoma underwent conjunctiva scraping with a swab and the material was sent for laboratory analysis. All school children diagnosed with trachoma were treated at the Unified Health System (SUS). The collected data were analyzed using the Statistical Package for Social Sciences software, IBM Inc., USA - SPSS, version 22.0. Among the students, a 4.7% prevalence rate of trachoma was found, predominantly in rural areas.