TY - JOUR T1 - Fertility Rate of Hydatid Cyst in Sheep and Cattle Slaughtered at Zanjan abattoir in 1998 TT - خصوصیات و میزان باروری کیستهای هیداتیک دامهای ذبح شده در کشتارگاه شهرستان زنجان در سال 1377 JF - umsha JO - umsha VL - 7 IS - 2 UR - http://sjh.umsha.ac.ir/article-1-934-en.html Y1 - 2000 SP - 0 EP - 0 KW - Animals KW - Domestic / Echinococcosis / Fertility N2 - The present study was conducted to determine viability rate of protoscoleces and fertility rate of hydatid cysts isolated from 118 sheeps and 114 cattles slaughtered at Zanjan abattoir during 1998. At first , cyst number of the infected organs was counted and their diameter was measured. Then by dissecting the cysts , their fertility was determined. To determine protoscoleces viability , eosin - staining technique was applied. The results indicate, in infected sheep, cysts were found in 17% of the livers , 47.5% of the lungs and 35.5% of the livers and lungs concurrently, with cyst fertility rate of 49.15% and protoscoleces vialility of 67%. In infected cattle cysts were found in 5.26% of the livers, 80.7% of the lungs and 14.04% of the livers and lungs concurrently , with protoscoleces viability of 58%. 96.5% of the cattle organs were found infected with mixed fertile and infertile cysts. Frequency of the multivesicular cyst in both liver and lung was higher than univesicular cyst. Fertility rate of liver cyst was higher than lung cyst and multivescular cyst higher than univesicular cyst. No significant difference between protoscolex viability rate of liver and lung as well as multivesicular and univesicular cysts were observed. M3 ER -