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Survey of Cryptosporidium oocysts in insectivorous bats in Taiwan and the influence of compost heaps treatment on Cryptosporidium oocysts.
Cryptosporidium spp., the zoonotic infective parasitic protozoa in the digestive dust of vertebrates, is responsible for the clinical symptom of diarrhea. This study aims at a series of examination of parasites in insectivorous bats and Cryptosporidium oocysts were examined in the fecal samples from 24 bat habitats. After long observation of daily feces of the wild caged bats, discovered the existence of Cryptosporidium spp, which indicates these bats were infected.
During the survey, the oocysts of Cryptosporidium spp observeed in the feces of 3 deer farms near a nocturnal bat habitat in Taichung county were presented positive for Cryptosporidium infection. The sample from a traditional compost heap in the deer farm was also examined as positive. Compared with the result of those from 12 modem compost heaps, the temperature of traditional compost heap is too low to destroy the Cryptosporidium oocysts.
To survey for infection of deer by Cryptosporidium, the feces of deer from 17 daily farms was examined in central Taiwan. Among the 76 deer examined, 66 (86.8%) are observed to be positive for Cryptosporidium infection respectly. The cause may be mixture of fodder with feces. Since the feces of farm animals in central Taiwan have been stocked confidentially, those compost heap containing cryptosporidium oocysts may be carried by the wild filth flies, dung beetles and other insects which will be eaten by insectivorous animals and digested. Therefore, Cryptosporidium oocysts may in this way spread infection.
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