Soroprevalência da infecção por Helicobacter pylori em crianças de baixo nível sócio-econômico em São Paulo
Palavras-chave:
Infecções por helicobacter, Sorologia, Estudos transversais, Estudos soroepidemiológicos, População urbanaResumo
CONTEXTO E OBJETIVO: A infecção por Helicobacter pylori é adquirida principalmente na infância e é associada a morbidade significativa em adultos. O objetivo foi avaliar a soroprevalência de infecção por H. pylori bem como fatores de risco em crianças de baixo nível socioeconômico atendidas em um hospital público em São Paulo, Brasil. TIPO DE ESTUDO E LOCAL: Estudo transversal, realizado entre pacientes atendidos em ambulatório. MÉTODOS: Foram avaliadas 326 crianças (150 meninos e 176 meninas, idade: média 6,82 ± 4,07 anos) em estudo transversal. Foram excluídas aquelas com doenças crônicas, tratamento prévio de H. pylori e cujo responsável não consentiu participar do estudo. Os responsáveis responderam questionário demográfico e foi coletada uma amostra de sangue. O teste sorológico empregado foi o CobasCore II, exame de segunda geração, sendo considerados positivos títulos > 5 U/ml. RESULTADOS: Infecção por H. pylori foi diagnosticada em 116 (35,6%). A idade dos pacientes infectados foi maior que a dos demais (7,77 ± 4,08 anos versus 5,59 ± 3,86 anos; p < 0,0001). A prevalência aumenta de 20,8% entre dois e quatro anos de idade para 58,3% entre maiores de 12 anos. Não houve relação significativa entre soropositividade e sexo, raça, aleitamento materno, número de pessoas ou de cômodos na casa, compartilhamento de camas, domicílio em favela, escolaridade materna, renda familiar ou estado nutricional. Na análise multivariada, a única variável significativamente associada a soropositividade foi idade. CONCLUSÃO: A infecção possui prevalência intermediária na população estudada, e a idade foi associada a maior prevalência.
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