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Acanthamoeba spp. is a free-living amoeba that can cause major infections in humans, including keratitis and granulomatous encephalitis. Thus, water resources play an important role in transmitting Acanthamoeba spp. infection to humans. The purpose of this study was to investigate the presence of Acanthamoeba spp. in public swimming pools from three cities of Kerman Province, southeastern Iran. Eighty water samples of 20 public indoor swimming pools were taken from Kerman, Jiroft, and Kahnauj cities. Water temperature (°C), pH, and free chlorine concentration (ppm) were measured. Filtration and cultivation were applied on non-nutrient agar medium. The polymerase chain reaction was applied by using the genus-specific primers (JDP1 and JDP2) on positive samples; these primers can amplify the 423–551 bp fragment. Eighteen of the 20 swimming pools (including 32/80; 40% samples) were contaminated with Acanthamoeba spp. All swimming pools of Jiroft and Kahnauj and 88.2% of swimming pools in Kerman were contaminated. As such, all 32 Acanthamoeba isolates were amplified using the JDP primer pairs. Two genotypes, T3 and T4, were also identified. The present research is the first to report Acanthamoeba spp. in public swimming pools from Kerman Province. Due to high occurrence of this protozoan, it is recommended to use warning signs around swimming pools to create awareness of this infection.

High occurrence of Acanthamoeba spp. in the water samples of public swimming pools from Kerman Province, Iran