Giardia lambia infection is common in:
Selective IgM deficiency
Selective IgA deficiency
Common variable hypogammaglobulinemia
Severe combined immunodeficiency
Selective IgA deficiency is associate with infections like G. lamblia, hepatitis virus, S. pneumoniae, and H. influenzae Immunodeficiencies and common infections: Selective IgM deficiency: S. pneumoniae, H. influenzae, E. coli Common variable hypogammaglobulinemia: Pneumocystis, Cytomegalovirus, S. pneumoniae, H. influenzae Severe combined immunodeficiency: S. aureus, S. pneumoniae, H. influenzae, Candida albicans, Pneumocystis, Varicella-zoster virus, Rubella virus, Cytomegalovirus Ref: Harrisons principles of internal medicine, 18th edition, Page: 1010.