Immuno-epidemiology of human Schistosoma haematobium infection: preferential IgG3 antibody responsiveness to a recombinant antigen dependent on age and parasite burden. - Mutapi, Francisca; Mduluza, Takafira; Gomez-Escobar, Natalia; Gregory, William F.; Fernandez, Cecilia; Midzi, Nicholas; Maizels, Rick M. (BMC Infectious Diseases, 2006)