Studies on naturally infected sheep with Haemonchus contortus with special reference to blood and serum haematobiochemical changes [electronic resource].

Includes references.

The present study was conducted on sheep which were slaughtered in the main El-Mansaura abattoir, where they were exposed to antimortem examination for detecting any parasitological or signs of disease. Also the sheep were subjected to postmortem examination for detecting any parasitological infections. The sheep which were completely free from any parasitological infections were considered as control group. The sheep which proved to be infected with abomasal nematodes served as infected or parasitized group. Blood samples were taken from all animals (control and parasitized animals) with or without anticoagulant for haematological and biochemical investigations. After postmortem examination, the stomach worms were collected, identified as H. controtus and counted to estimate percentage of the infection. The prevalence of H. controtus was 44.12% among examined sheep. young animals were non susceptible to infection than adults and seasonal dynamics of H. controtus in sheep revealed that infection rate reached its peak during winter season (61.9%) while the lowest rate was in summer (20%). Laboratory investigations in the present study proved that; presence of high significant decrease in TRBCs count, PCV and very high significant decrease in Hb concentration. Also, the study showed significant decrease in MCV value while the decrease was highly significant for MCH and MCHC values in parasitized group. TWBCs count showed very high significant increase. On the other side, the lymphocytes showed high significant decrease. Serum biochemical analysis illustrated high significant and very high decrease in total protein and a1bwnin respectively, on the contrary it was observed high and very high significant increase B. urea, creatinine and liver enzymes (S.AST & S.ALT) levels respectively. The level of Calcium, Phosphorus and Magnesiurn decreased significantly, while the significant decreased was very high in the level of Iron and Copper in parasitized group when compared with control one.

Summary in Arabic.