الفهرس 
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Abstract
Meat-borne parasites are Sarcocystis species, Toxoplasma gondii, Taenia saginata, Taenia solium and Trichinella spiralis.
Human gets infection by eating raw or undercooked meat infected with the viable infective stages of these parasites. Cooking is effective in killing the parasites if the appropriate temperature is reached in the core of the meat product.
A total of 300 animals including (cattle, goat, and pigs) 100 each, slaughtered in Minia slaughter houses. from each animal, five samples were taken from different muscles (esophageal, tongue and cardiac) and different organs (liver and brain). Also, blood samples were collected.
Meat samples were subjected to macroscopic and microscopic examination (direct, digestion and H&E staining) for detection of Sarcocystis species, T. gondii, T. saginata, T. solium and T. spiralis. Blood samples were subjected to Indirect Haemagglutination for detection of T. gondii specific antibodies.
The study revealed the following:
1- Out of 300 animals were examined by different techniques, 240 (80%) animals were infected with Sarcocystis species. This data was statistically significant (P≤0.05). These infected animals were as follow; 80 (80%), 92 (92%) and 68 (68%) cattle, goats and pigs respectively were infected with Sarcocystis species. This data was statistically significant (P≤0.05).
2- Out of 100 cattle were examined by different techniques, 80 cattle (80%) were infected with Sarcocystis species. This data was statistically significant (P≤0.05).
3- Out of 300 muscle samples from cattle were examined by different techniques, sarcocysts were not visible macroscopically. On the other hand, 100 muscle samples (33.3%) were positive by direct microscopy and 156 muscle samples (52%) were positive by digestion method. These data were statistically significant (P≤0.05).
4- Out of 100 oesophageal muscle samples were examined, 0 (0%), 49 (49%) and 68 (68%) muscle samples were positive for Sarcocystis by macroscopy, direct microscopy and digestion method respectively. Out of 100 tongue muscle samples were examined, 0 (0%), 37 (37%) and 53 (53%) muscle samples were positive for Sarcocystis by macroscopy, direct microscopy and digestion method respectively. Out of 100 cardiac muscle samples were examined, 0 (0%), 14 (14%) and 35 (35%) muscle samples were positive for Sarcocystis by macroscopy, direct microscopy and digestion method respectively. These data were statistically significant (P≤0.05).
5- Out of 80 infected cattle with Sarcocystis species by digestion method, about infection at one site, oesophageal muscles only were infected in 16 animals (20%), tongue muscles only were infected in 5 animals (6.2%) and cardiac muscles only were infected in 3 animals (3.8%). About infection at two sites, both oesophageal and tongue muscles were infected in 24 animals (30%) and both oesophageal and heart muscles were infected in 8 animals (10%). While, both tongue and heart muscles were infected in 4 animals (5%). About infection at three sites, muscles of oesophagus, tongue and heart were infected in 20 animals (25%). This data was statistically significant (P≤0.05).