[Assessment of the antibody response in patients with giardiasis]

Of 104 patients under study for giardiasis-like clinica symptoms, 101 were parasitologically positive. The presence of antibodies was shown in 99 of them, which means 96% sensitivity and 90% specificity in the indirect immunofluorescence technic. Antibody response was significantly higher (p < 0.01) in those patients with no history of the disease. A significant fall (p < 0.01) was seen in antibody titres in all patients a month after the effective treatment, as well as well as persistent positive titres in those who were not cured.