RÉSUMÉ
A cross sectional study was conducted on randomly selected 303 apparently healthy workers in 58 restaurants in Sana'a City, with ages between 12 to 70 years 22.12 +/- 8.34. A required data were taken through a designed questionnaire and stool samples were collected and examined microscopically by direct wet mount [saline and iodine stained smears] and by formalin ether concentration sedimentation technique. The results showed 72.9% an overall infections rate in a descending order they were E. coli [58.85%], E. histolytica [48.87%], G. lamblia [35.29%], S. mansoni [7.69%], T. trichiura [4.98%], A. lumbricoides [4.07%], H. nana [3.62%], and 0.91% for both E. vermicularis and A. doudenale. Intervention programs including health education, strict supervision of health authorities on workers in restaurants, hotels and other food shops as well as environmental sanitation are required