الفهرس 
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Abstract
During the period extended from January, 1995 till December, 1995,
the mesenteric lymph nodes of 1881 animal (868 camel, 317 cattle, 316
sheep and 380 goat) from three localities in Egypt (Cairo abattoir, El-Sayeda Zeinab (Cairo), El-Zagazig abattoir and Bilbeis region (Sharkia) were examined for Linguatula serrata infestation. The present study revealed that 106 (5.6%) out of 1881 examined animal were infested with L. serrata
nymphs. The highest infestation rate was recorded in goats (7.6%) followed
by camels (7.4%), cattle (2.5%) and then sheep (1.6%).
High infestation rate (9.5%) was recorded in goats examined at Bilbeis
region, (Sharkia), while, 76 examined goat at El-Zagazig abattoir (Sharkia)
were free from this parasite. On the other hand, (6.3%) of examined sheep at
Bilbeis region (Sharkia) harboured L. serrata nymphs, while, only (0.4%) of
examined sheep at El-Zagazig abattoir (Sharkia) were positive.
The seasonal dynamics of infestation with L. serrata nymphs among
examined animals showed that the highest infestation rate was observed
during summer (6.6%) followed by spring (6%) then winter (5.6%) and autumn (4.3%).
Regarding the age of susceptibility of different examined animals for
infestation with L. serrata nymphs, high infestation rate (6.8%) was
observed in older animals, while, only (2.8%) of young animals harboured
this parasite.
The morphological characteristic features of L serrata nymphs were
described in details using both light and scanning electron microscopes.
Also, the histopathological effects of this parasite nymphs on the infested
lymph nodes were discussed.