Abstract
Fungi plays an important role in the infection of humans with many diseases, including
allergies. It has been found that there are many fungi in schools air in the city of Tikrit during the
first season (Autumn) and the second season (Spring) to 24 genera as well as sterile mycelium and
yeast. Cladosporium was found to be the most common fungus in schools air in Tikrit
(kindergartens and primary schools for boys and girls and secondary schools for boys and girls) in
the first season in indoor air (39.13, 30.76, 35.93, 24.56 and 43.75%, respectively). And outdoor air
(45.16, 17.64, 25.63, 5.63 and 16.66%, respectively). There was also a repeat of the second season
in the air of kindergartens and primary schools for girls (61.29 and 16.9%, respectively) then the
fungi Penicillium, Alternaria, Rhizoctonia and Stemphylium. The total number of colony formation
units for Cladosporium 99 CFU and followed by Penicillium (58CFU) in Autumn, in Spring
Cladosporium (124 CFU) and Alternaria is 104 CFU. Cladosporium