| diagnosis of trypanosoma evansi in saudi arabian camels (camelus dromedarius) by the passive haemagglutination test and ag-elisa. | the passive haemagglutination test and ag-elisa were employed to monitor antibody titres and antigenaemia levels in 4 najdi camels experimentally infected with trypanosoma evansi. the two tests were also used to determine the prevalence of trypanosomiasis in a total of 218 najdi camels in the gassim region, central saudi arabia, during the period from october 1992 to september 1993. trypanosoma evansi antibodies in the experimentally infected camels rose after 14-21 days and reached a maximum of ... | 1998 | 9916554 |