Resumo

ACOSTA-ACOSTA, Josué et al. Chronic diarrhea by Lamblia intestinalis in an adult. Acta méd. costarric [online]. 2017, vol.59, n.3, pp.117-119. ISSN 0001-6002.

We present a variable common immunodeficiency case in a young male patient with a long history (9 years) of recurrent gastrointestinal and respiratory infectious processes, despite the different therapeutic schemes, with diagnostic evidence of low levels of IgG, IgM And IgA; aiming to make a comparison of its evolution in function of its clinical history and the results of its complementary examinations, with the bibliography reviewed. Variable common immunodeficiency explains a primary IgG deficit (at least 2 standard deviations below the reference values for his age) and at least one other Ig (IgA or IgM) and a reduction or absence of antibody production. This entity is considered infrequent in terms of incidence, although it is often inadvertent due to the predominance of its effects. Clinically it is manifested by the presence of recurrent infections with preponderance of the respiratory and gastrointestinal. From an aetiological point of view, its genesis is controversial, but low levels of immunoglobulins and a reduction or absence of antibody production are all described.

Palavras-chave : common variable immunodeficiency; antibody production; recurrent infections.

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