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GROUPING CHICKENS INTO RESISTANT AND SENSITIVE TO STRESS ON THE BASES OF HETEROPHIL/LYMPHOCYTE RATIO FOR GENETIC AND IMMUNOLOGICAL STUDIES. | ||
| Iraqi Journal of Biotechnology | ||
| Article 1, Volume 4, Issue 1, 2005, Pages 144-150 | ||
| Abstract | ||
| ABSTRACT 1- The Heterophil/Lymphocyte ratio (H/L) was used to separate chickens into Resistant (R) and Sensitive (S) to S.typhimurium, using the 99% lower confidence limit for selection. 2- Five groups of chickens were constructed, 20 each, varying the number of R and S in each group, from all R, (15R+5S), (10R+10S), (5R+15S) and all S. Mean H/L ratio, before and 9 day post Salmonella typhimurium infection were compared. 3- Difference in H/L ratio group means, within "before" and "after" infection were significant due to different constructions. 4- Comparison of "before and "after" H/L mean, within each group, showed a different outcome according to group construction. 5- It was concluded that individuals should be separated into R and S, using the H/L ratio as an indicator and criterion for selection for resistance before grouping the chickens for genetical and immunological studies | ||
| Keywords | ||
| Key Words; Stress resistance; Experimental grouping | ||
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