During the period 1990–1998, 99 cases of human cystic hydatidosis (12.4 cases per year) were surgically treated at the two main hospitals in Arbil province, northern Iraq, and from this the human occurence for the province was estimated to be 2 per 100,000 inhabitants. In the same area, 1270 sheep, 550 goats and 320 cattle were examined at slaughter for hydatid cysts and prevalence rates were found to be 15.0%, 6.2% and 10.9%, respectively. A decreasing tendency in livestock prevalences was found towards the end of the study period. As in humans, most of the hydatid cysts in livestock were located in the liver. Fertility of sheep cysts, i.e. those containing protoscoleces, was found to be significantly higher (64%) than that of goats (35.7%) and cattle (29.8%). The percentage of fertile cysts containing viable protoscoleces varied between 63 and 82% in the livers and between 72 and 79% in the lungs of the different animal species. A total of 97 stray dogs were examined post-mortem in the years 1991, 1992 and 1998, and Echinococcus granulosus worms were found in the intestines of 48 dogs (49.5%). High worm burdens (> 1000) were observed in 37% of the dogs, medium worm burdens (200–1000) in 41%, and low worm burdens (< 200) in 22%. In 1998, the prevalence of canine echinococcosis (24.3%) was found to be significantly lower than in 1991 (70.4%) and 1992 (60.6%). The prevalence of human hydatidosis did not differ significantly over the years, but the study confirmed that hydatidosis is endemic in northern Iraq, and that housewives, labourers and farmers appear to be at the greatest risk of infection.

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Parasites of small mammal’s (house mice) living in human areas cause a tremendous burden of vector borne disease. Small mammals infected with parasites can readily facilitate parasitic transmission to humans and other susceptible animal hosts. The objective of our study is to determine the presence of intestinal parasites in mice collected from five different popular localities in Erbil city during the period of (2014-2015). Out of total (60) mice (Mus musculus) examined, 34(56.6%) of which were infected with (1-3) species of intestinal parasites. In this study eight species of intestinal parasites were detected and identified as follow as: Four types of intestinal protozoans: Entamoebamuris 6(17.6%), Trichomonasmuris 3(8.8%), Giardia muris 4(11.7%) and Emeria sp.2(5.8%),two types of Cestodes: Hymenolepis nana8(23.5%) and Hymenolepisdiminuta 3(8.8%), and two types of mice pinworm: Aspiculuristetraptera4 (11.7%) and Syphaciaobvelata 4 (11.7%). Among total mice (34) infected with intestinal parasites, infection with helminths were more prevalence 19(55.8%) than protozoans15(44.1%). According to the multiple infections with the parasites, we found that mice infected with the single infections 20(58.8%) were higher than both double 10(29.4%), and triple 4(11.7), and about sex of mice involvement, we found that females were highly infected 21(61.7%) than males13 (38.2%). The results of the present study showed that the prevalence of the parasites in mice collected from Hayaskary were highly infected (29.4%) compared with the other localities of the study areas.

The current study included two levels: - cystic echinococcosis in man and a survey of eggs of the parasites E. granulosus in feces of stray dogs in Kalar city sulaymania province. The statically analysis of private and governmental hospitals documents showed 56 cases of cystic echinococcosis have been treated surgically during five years’ period (2013-2017). The patients who included in this study were examined by physicians and confirmed by one or more of the following methods, imaging diagnosis (CT scan, Ultrasound, and X ray), histopathology and serology. Among total of 3330 patients admitted to the surgery department of these hospitals, 56 (1, 6%) were found to be infected with cystic hydatidosis at approximately 5.6 cases per 100,000 persons and at average 11.2 cases per one year. Among total patients’ involvements, house wives 22 (39.28%) were high infected and then followed by the workers and students 12(21.4%) and 11(19.64%) respectively. According to the organs patients involvement liver was highly infected 31(55.3%) and then followed by lungs 9(16.07). The age group (41-50) yrs. was 13(23.21%) highly infected than other ages, and the females (53.57%) were high infected than males (46.4%) among total patients infected. The economic loses of 56 cases treated surgically was approximately 112000$ USA$. This study is the first time talking about economic losses in this city of Iraq. The result of 60 sample feces examination of stray dogs showed that 36.6% of which were contaminated with eggs of E. granulosus. The high percentage of infection with this parasite (60%), was found at the Slaughtered animal's area, south of city center and the lowest (10%) was at Awarakan, Jutyaran & sharawan2 area, north of city center.

In the present survey 18 species of endo and ecto-parasites were recorded during the examination of 50 Mus musculus (Linnaeus, 1758) among 10 localities in Erbil city, of which 7 species were protozoan and as follows : Chilomastix bettencourti (da Fonseca 1915)82%; Giardia muris (Filice, 1952) 68%; Tritrichomonas muris (Grassi,1879)36%; Entamoeba histolytica (Schaudinn,1903) 24%; Entamoeba coli (Grassi,1879)32%; Eimeria sp. 28% and Trypanosoma musculi (Kendall,1906) 2%; and 8 species were helminthes as follows: 4 Cestodes: Rodentolepis nana (von Siebold, 1852) 8%; Hymenolepis diminuta (Rudolphi, 1819)2%; larval stage of Echinococcus granulosus (Batsch, 1786)8%, Cysticercus fasciolaris (Rudolphi, 1808)6%, 4 Nematodes: Aspiculuris tetraptera (Nitzsch, 1821)8%; Syphacia obvelata (Rudolphi, 1802)36%; Syphacia muris (Yamaguti, 1935)2% and Trichuris muris (Schrank, 1788)10%; and 3 species of ectoparasites were diagnosed as follows: the Oriental rat flea Xenopsylla cheopis (Rothschild, 1903)2.0%, the spined rat louse Polyplax spinulosa (Burmeister, 1839)16.0%, and the mite Laelaps nuttalli (Hirst, 1916)4.0%. Endo-multiple infections had been noticed, as single (26%); double 50.0%; triple (22.0%) and tetra infections 2.0%. No significant differences were found between the sexes and weights of mice. The mice of Hayaskary and Langa were high infected with parasites. In the current study, we recorded the infection of the liver of Mus musculus with larval stage of Echinococcus granulosus (hydatid cyst) as the first natural infection in Iraq.