الفهرس 
Acknowledgement
Blood parasitesOnly 14 pages are availabe for public view
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Abstract
In the present study, 250 life domestic pigeons at different-ages collected from private breeding houses, lofts and markets in three localities of upper Egypt, Assuit, Sohage and El-Wady El-Gadid. Parasitological examination including antimortum and postmortem examination conducted on each examined bird for collection and isolation of ecto and endo-parasites .
Identifecation of parasites achieved by different methods. Isolated ecto-parasites mounted on a microscopy slide, examined under the light microscope . some species of isolated endo-parasites examined immediatly by using the light microscope and others must be prepared before identifecation.
The present study demonstrated a total of three species of external parasites : 10.4 % Pseudolynchia canariensis, 2.8% Argas reflexus and 1.2% Columbicola columbae and eight species of internal parasites included (2) species of protozoal parasites: 42.3% Trichomonas sp. and 12.6% Eimeria sp. , (3) species of blood parasites: 26.8 % Haemoproteus columbae, 2.8% Plasmodium sp. and 0.8% Trypanosoma sp. , (3) species of helminth parasites: 29.6%,18.8% intestinal cestodes, 10% intestinal nematodes and 0.8% Gizzard nematodes .
The higher percentage of parasites appeared in pigeons from Assiut, next Sohag and finally El-WadyEl- Gadid Governorate. The percentage of parasites in house rearing pigeons were higher than that in pigeons from lofts and markets due to difference of feeding source and less of hygiene strategies in house rearing while routine and regular treatment applied in lofts and markets pigeons According to bird age and sex, the overall prevalence was high in adults than squabs and in males than female pigeons.
Summary and conclusion
The present work was carried out also to conducting experimental trials on chemical (sulphadimidin 33 1/3, E.S. DaD powder, Dadcox 2.5%) and natural (garlic and onion mixture 12.5%) treatment for one of the most important protozoan parasite of pigeon (Eimeria sp.). to monitor the impact of each on the different phases of the life cycle of the parasite, beginning from the early stages and even be oocyst . By applying these compounds on the third day post infection to study the impact on the early stages and on the fifth day post infection to study the impact on the oocyst.
It was clear from the results of the experience that the treatment on the third day post infection leads to the elimination of the Eimeria oocyst Which shows its effectiveness against three phases of coccidia while in the fifth day post infection it led to interruption of oocyst excretion for 3-4 days after treatment which shows the effectiveness against third stage only.
The study showed that Dadcox 2.5% was the best drug due to its effectiveness and short duration of treatment.
Finally ,For the prevention of pigeon coccidiosis we are advised to remove the stool pigeons a day, that breeding ground is dry cleaner in addition to waterings and feeding troughs and avoid feeding on the floor as well as monthly preventive therapy play agreat role for prevention of pigeon coccidiosis .