Krisana PengsaaChukiat SirivichayakulNiyada VithayasaiSansnee SenawongVoravich LuangwedchakarnMahidol UniversityThailand Ministry of Public Health2018-08-242018-08-242007-05-01Southeast Asian Journal of Tropical Medicine and Public Health. Vol.38, No.3 (2007), 424-426012515622-s2.0-34547289960https://repository.li.mahidol.ac.th/handle/20.500.14594/24901A 15-year-old Thai boy with multiple episodes of chronic diarrhea caused by giardiasis with hypogammaglobulin M and IgG 4 subclass deficiency (but normal antibody response to rabies vaccine) is reported. Immune status follow-up is necessary for a definite diagnosis and proper management.Mahidol UniversityMedicineArticleSCOPUS