Using SEM techniques, micromorphologica! features of the three larval instars of Wohlfahrtia nuba were studied, revealing their anterior ends, anterior spiracles, and posterior ends and posterior spiracles. We illustrated some important differences especially in shape and size of the mouth hooks, size, number and shape of the leaf-like structures surrounding the mouth vestibule and the blunt broad branches of the ... إقراء المزيد

This essay is a comprehensive review on the pathogenic and potentially athogenic amoebae,. The morphological differences between intestinal types as well as the free living types were clarified, scanning and transmission electron microscopic studies were discussed.. Moreover, it discussed three virulence factors of E. histolytica trophozoite which enable it to penetrate the intestinal mucous membrane and the possibilities of presence ... إقراء المزيد

Background :Toxoplasma gondii is an obligate intracellular protozoan parasite that can infect most mammals and some birds. Ocular toxoplasmosis is not uncommon disease causing posterior uveitis and retinochorodidtis and sight-threatening complications do occur. Objectives: Study on ocular toxoplasmosis in serologically proved some immunocompetent patients and to find out the efficiency of Spiramycin on the improvement of the ocular lesions in ... إقراء المزيد

One of the neglected food -born-diseases is fascioliasis ,it is serious parasitic disease infecting humans and animals worldwide and tops all the zoonotic helminthes .In Egypt , human and animal fasciolisis is an endemic clinical and epidemiological health problem .The causative agents, Fasciola hepatica and Fasciola gigantica, which their geographical distributions is overlapped. Moreover, in humans, liver flukes classification can ... إقراء المزيد

Background: Studies on factors affecting the viability and hatchability of- elminth eggs are extremely important since eggs are considered as the first stage in the life cycle of most parasites such as Fasciola and Schisto-soma spp. in freshwater snails and hookworms in soil. Objective: The aim of the present work was to study the effect of some physical and chemical ... إقراء المزيد

Introduction: Infection with Helicobacter pylori is accepted as a main cause of gastritis and gastritis-associated diseases. Giardia lamblia parasite is considered the most common protozoal infection in human. Concomitant H. pylori and Giardia infection is common for their similar mode of transmission and strong correlation to socioeconomic levels, but only few reports had described gastric giardiasis. In this work, H. ... إقراء المزيد

Giardiasis is the most common protozoal infection of the human intestinal tract and it is found worldwide. In the present study, a community-based prospective study was conducted among randomly selected 600 persons aging from one upto 50 years old. Generally, prevalence rate was 22.3% and it is considered a high rate of infection. Subgrouping of selected persons was done and ... إقراء المزيد

Cryptosporidiosis is a disease caused by a coccidian parasite that causes diarrhea in wide range of vertebrates worldwide . The concept of cryptosporidiosis has been changed from that of the rare and asymptomatic infection to an important cause of severe longstanding diarrhea in man specially in immunocompromised hosts. The diseaes is of particular importance in early childhood. Due to the ... إقراء المزيد