“…The high level infestations were reported by Saddozai et al [29] in primary schools of Quetta City, Pakistan with infestation rate of 87 % , 59 % in primary schools from the eastern Napal [30] , 48.9 % in primary school of Baghdad, Irag [31] , 35 % in primary schools of Kelantan, Malaysia [32] and 29.7 % in elementary schools of Buenos Aires, Argentina [19]. However, lower infestation rate were reported by Oh et al [8] in primary schools from urban and rural areas of Korea with infestation rate of 4.1 % [8] , 1.6 % in primary school from urban and rural areas of eastern Poland [33], 3.3 % in primary school from Bobigny, France [34] and 1.6 % in primary school of USA [35] .…”