RESUMO
Malaria is a significant public health problem in more than 100 countries and causes an estimated 200 million new infections every year. Despite the significant effort to eradicate this dangerous disease, lack of complete knowledge of its physiopathology compromises the success in this enterprise. In this paper we review oxidative stress mechanisms involved in the disease and discuss the potential benefits of antioxidant supplementation as an adjuvant antimalarial strategy.
Assuntos
Malária/imunologia , Malária/metabolismo , Estresse Oxidativo/fisiologia , Animais , Hemólise/imunologia , Interações Hospedeiro-Parasita , Humanos , Imunidade Inata/fisiologia , Óxido Nítrico/metabolismo , Plasmodium falciparum/imunologia , Espécies Reativas de Oxigênio/metabolismoRESUMO
To study enteropathogens, 100 fecal samples were collected from a Brazilian human immunodeficiency virus (HIV)-seropositive population, with or without diarrhea. Giardia lamblia and calicivirus were significantly associated with diarrhea as were severe immunosuppression and the presence of at least one enteropathogen. No sample was positive for rotavirus and only one asymptomatic individual carried the astrovirus. We concluded that there is a great diversity of pathogens and opportunistic infections in the studied population, with a high prevalence of mixed colonization/infection. Our findings pave the way for future molecular studies related to the expression of virulence factors and to the possibility of pathogen-pathogen interactions, especially between G. lamblia and calicivirus. These findings are relevant to the improvement of therapies and controlling diarrhea in the HIV-seropositive population.