الفهرس 
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Abstract
Intestinal parasitic diseases are among the most common parasitic infections of human. Current estimates suggested that about 3.5 billion of world population, most of them living in developing countries, harbour one or more of these parasites. School children are particularly at risk of infection with these parasites. Epidemiological evidence worldwide shows that school age children are not only more likely to be infected, they are also more likely to be more heavily infected than other age groups.
Although death from these IPIs is relatively rare, various pathological processes occur, ranging from subtle morbidity such as anemia, malnutrition, growth reduction to reduced physical fitness and mental abilities.
The present work was conducted to compare and evaluate different techniques in diagnosis of human intestinal parasites among school children.
The study was carried out in the primary school of Arab El-mahder in Motobus village, El-Riyad District, Kafr El-Sheikh Governorate. Out of 125 children asked to be enrolled in the study, 90 responded to submit stool samples. Stool samples were collected and examined by Kato-Katz method (fresh sample), formalin ether and FLOTAC techniques (10 % formalin preserved samples).
The present study revealed that FLOTAC techniques detected the highest IPIs (87.7%), as compared to Kato-Katz and formalin ether (57.8% and 72.2% respectively).
As regards, helminthic infections, the obtained result showed that, Kato-Katz diagnosed the highest infection rate (57.8%) followed by FLOTAC FS7 (44.4%), formalin ether showed the lowest helminthic infection rate (27.7%). Meanwhile, FLOTAC diagnosed more positive cases of H. nana (17.8%) while Kato-Katz and formalin ether showed similar results (12.2%).
Kato-Katz, formalin ether and FLOTAC techniques showed good to almost perfect agreement in the diagnosis of intestinal parasitic worm infections.
Concerning protozoan infections, it is extremely interesting to reveal that FLOTAC FS1, FS2 detected almost equal protozoan infection rate (43.3%) to that diagnosed by formalin ether (44.4%). There was very good agreement between formalin ether and FLOTAC techniques.
The present study compared the performance of the FLOTAC with Kato-Katz and formalin ether concentration techniques for detection of S. mansoni infections. Kato-Katz showed the highest infection rate (38.8%) followed by FLOTAC (22.2%) and the lowest infection rate was obtained by formalin ether (11.1%).
With infection intensity less than 36 eggs per gram, FLOTAC and formalin ether failed to detect any S. mansoni cases. Meanwhile infections with egg counts ranging from 36-72 epg, both Kato-Katz and FLOTAC detected equal percentage of infection (11.1%). Regarding egg counts more than 72 epg, the three techniques detected the same infection rate (11.1%).