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Egyptian Veterinary Medical Society of Parasitology Journal (EVMPSJ)
Parasitology department, Faculty of Veterinary Medicine, Suez Canal University
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Abstract: |
Cystic echinococcosis (CE), caused by Echinococcus granulosus,
affects both humans and livestock. Final hosts (dogs) are typically
subclinical, while intermediate hosts show symptoms based on cyst
location and infection severity. CE is mainly detected in abattoirs via post
mortem (PM) examination, making diagnosis challenging and increasing
transmission risk. The current study aimed to evaluate the serodiagnosis
and statistical significance of using different prepared antigens from cysts
against PM method. 170 serum samples were collected from cattle and
prepared for detection of optical density values by indirect ELISA against
different hydatid cysts antigens. The antigens were isolated from various
cystic components. Crude hydatid cyst fluid antigen (HCF Ag) was
prepared by aspirating fluid from infected organs, centrifuged and
aliquoted, laminated layer antigen (LL Ag) obtained by aspirating fluid
separating the laminated layer and homogenized, germinal layer antigen
(GL Ag) was isolated through dissection, protoscolices antigen (Pscs Ag)
collected, washed with PBS, and all isolates sonicated, and stored at -
20°C. Protein concentration was measured using modified Lowry method.
The obtained values were statically analyzed. PM prevalence was 11.76%,
while ELISA showed 13.5%, with higher prevalence in the liver (7.06%)
than lungs (2.35%). Significant differences were noted between antigens,
with GL, HCF, and Pscs Ags showing higher values than LL Ag. ELISA
diagnostic accuracy was 98.24 % for LL, GL, and Pscs Ags, and 60% for
HCF Ag. Our study suggests that GL, HCF, and Pscs Ags are effective and
sensitive immunodiagnostic tools for screening hydatosis.
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