| secretory antibodies against giardia intestinalis in lactating nicaraguan women. | secretory iga (siga) antibodies are important in the host defence against the intestinal protozoan parasite giardia intestinalis. however, few antigens have been identified. in this study 100 milk and saliva samples from lactating women, living in an endemic region (león, nicaragua), were screened for the presence of antibodies against g. intestinalis. most milk and saliva samples contained anti-giardia antibodies (59% and 52%, respectively), with a mean siga content 50 times higher in milk than ... | 2005 | 15987339 |