Assessment of humoral immunity to Eimeria tenella sporozoites in chickens by ELISA

Saravanan, S.; Palanivel, K.M.; Harikrishnan, T.J.; Srinivasan, Prakash; Selvaraju, G.

doi:10.14202/vetworld.2014.452-456

Cited by 1 publication

(1 citation statement)

References 14 publications

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“…However, G4 showed no histopathological changes and showed normal intestines as chickens in G3. Similarly, Saravanan et al, (2014) found a destruction of cecal epithelium in all groups administered 10 and 20µg of live sporozoite antigen and Sharma et al, (2015) found coccidial oocysts in the intestine's lamina propria and the epithelial cells of the caecum's submucosal glands, massive infiltration of heterophils and mononuclear cells, together with desquamation and sloughing of enterocytes in the intestine resulted in intestinal villi necrosis, in addition to submucosal blood vessel congestion, fibrosis, and edema, as well as submucosal degeneration. Increased FCR and decreased BWG in G6 may be due to the presence of cecal lesion caused by E. tenella, which destroys the absorptive mucosal surface of the intestine (Logan et al, 1993;Kheirabadi et al, 2008;Marien and Gussem, 2007;Mathis et al, 2018).…”

Section: Discussionmentioning

confidence: 90%

Evaluation of Coccidiosis Vaccines in Chicken

Sharaban

Seadawy²,

El-Khayat

et al. 2021

Kafrelsheikh Veterinary Medical Journal

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Coccidiosis is a serious disease affecting poultry. It is caused by a protozoan parasite of genus Eimeria that occupies the intestinal tract, causes tissue damage, and results in interruption of feeding and high mortality. This study aimed to evaluate the effect of different types of coccidial vaccines on the prevention of coccidiosis in chicken under field conditions. Chicks (n = 12; one-day-old; Avian-48 broiler) were randomly divided into 6 groups (G1, G2, G3, G4, G5, and G6), each group contained 20 chicks. The negative (G3) and positive (G6) control groups were non-vaccinated, while the remaining groups (G1, G2, G4, and G5) were vaccinated by live attenuated vaccine A (precocious strains, G1 and G4) and live non-attenuated vaccine B (wild strains, G2 and G5). G4-G6 were challenged on the 28 th day by 1 x 10 5 sporulated oocysts of Eimeria tenella. The feed conversion rate (FCR), body weight gain (BWG), oocyst shedding, lesion score, oocyst index, and histopathology were observed and recorded in all groups. Vaccinated challenged groups (G4 and G5) had significantly lower FCR, oocyst count, and oocyst index but with higher BWG than the non-vaccinated challenged group (G6). Interestingly, G4 and G5 had lower lesion scores with no mortality as compared to G6 which showed 10% mortality. This study concludes that the usage of the anti-coccidial vaccine has significant protective efficacies in broilers with great potential with attenuated strain vaccine.

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Section: Discussionmentioning

confidence: 90%