Humoral immune response of vaccine-I (supermatent from sonicated sporulated oocyst), vaccine –II (sediment from sonicated sporulated oocyst) and vaccine –III (un-sonicated sporulated oocyst) against conccidiosis in chickens was determined by indirect haemagglutination (IHA) test. IHA antibody titre was significantly higher (p

Tachyzoites, bradyzoites (in tissue cysts), and sporozoites (in oocysts) are the three infectious stages of Toxoplasma gondii. The prepatent period (time to shedding of oocysts after primary infection) varies with the stage of T. gondii ingested by the cat. The prepatent period (pp) after ingesting bradyzoites is short (3-10 days) while it is long (18 days or longer) after ingesting oocysts or ...

The anticoccidial effect of Artemisia annua and Pimpinella anisum on Eimeria tenella infection (1500 oocysts/chicken) has been studied. The products were used as oil administered 7.5% in water and as powder 1.5% in food. The effects of A. annua and P. anisum on E. tenella infection were assessed by clinical signs, mortality, fecal oocyst shedding, lesional score, body weight gain and feed conve...

The purpose of this study was to determine whether gamma-irradiated Cryptosporidium parvum oocysts could elicit protective immunity against cryptosporidiosis in dairy calves. Cryptosporidium parvum Iowa strain oocysts (1 x 10(6) per inoculation) were exposed to various levels of gamma irradiation (350-500 Gy) and inoculated into 1-day-old dairy calves. The calves were examined daily for clinica...

To determine whether clinical manifestations are associated with genotypes or subtypes of Cryptosporidium spp., we studied a 4-year longitudinal birth cohort of 533 children in Peru. A total of 156 infection episodes were found in 109 children. Data from first infections showed that C. hominis was associated with diarrhea, nausea, vomiting, general malaise, and increased oocyst shedding intensi...

Detection of Toxoplasma gondii DNA in cat feces is considered indicative of the presence of T. gondii oocysts. This study aims to demonstrate that the high sensitivity of qPCR can lead to T. gondii DNA detection in cat feces in the absence of oocysts. A cat immune to toxoplasmosis was fed with a mouse experimentally infected with T. gondii. Detection of DNA of this parasite was performed by qPC...