![]() ![]() Duangduen Krailas.įollow Evolutionary Systematics on Facebook and Twitter. Krailas D, Namchote S, Komsuwan J, Wongpim T, Apiraksena K, Glaubrecht M, Sonthiporn P, Sansawang C, Suwanrit S (2022) Cercarial dermatitis outbreak caused by ruminant parasite with intermediate snail host: schistosome in Chana, South Thailand. indicum DNA sequences from Thailand, which will be useful for further genetic study of the other blood flukes in this region.” “In addition, the sequence data generated here are the first S. “The results of this study will provide insights into the parasite species that cause cercarial dermatitis and may improve our understanding of public health problems in the outbreak and agricultural vicinity areas,” the authors of the study say. Some of the other worm species they found parasitized the intestines of fish, mammals, or birds, while others caused anemia and even death in ruminant animals. Images of sporocyst stained with 0.5% neutral red (light microscopy) Abbreviations: c: cercaria, eb: excretory bladder, ep: esophagus, fu: furca, h: head organ, i: intestine, pg: penetration gland, sp: sporocyst, ta: tail, vs: ventral sucker. Images of cercaria stained with 0.5% neutral red (DIC microscopy) e. Image of unstained cercaria (DIC microscopy) d. Body part of cercaria stained with 0.5% neutral red (DIC microscopy) c. Head organ of cercaria stained with 0.5% neutral red (DIC microscopy) b. spindale have been reported to be widespread, they caused major pathology and mortality to livestock, leading to welfare and socio-economic issues, predominantly among poor subsistence farmers and their families.” Image of Schistosoma indicum Montgomery, 1906 (Syn. “In South India and Southeast Asia, where S. indicum group primarily cause cercarial dermatitis in humans, which has become an important public health issue for people living in endemic regions.” spindale implies the spread of cattle blood fluke cercariae in aquatic environments.” spindale, cause a hepato-intestinal schistosomiasis resulting in reduced milk yield,” the authors explain. “Ruminant-infecting trematodes, namely, S. Collected snails from five locations of cercarial dermatitis outbreak area. The cercarial dermatitis outbreak was due to ruminant parasites, such as the blood fluke Schistosoma indicum, which often uses domestic animals as its host. ![]() Having studied six snail species from the area, they found out that two were infected, each with three different species of flatworms. “The study of intermediate host and definitive host in the outbreak area are important for the control program of snail-borne disease,” the researchers argue in their research paper, which was published in the open-access scientific journal Evolutionary Systematics. Following a short investigation, three cases of patients were confirmed to be cercarial infections by skin biopsy (Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health, Thailand). ![]() It mostly affected rice farmers from the area, who were busy with cultivation during the rainy season. Cercarial dermatitis cases from Chana district, October 2020īetween August and October 2020, a cercarial dermatitis outbreak with 359 confirmed cases occurred in Chana district, Songkhla Province, South Thailand. The gravity of an outbreak depends on how humans and birds or mammals come in contract with the aquatic environment, but people engaged in water activities, such as farmers, fishermen, and agricultural workers, are most likely to be affected. Unable to mature into adults, the larvae then die on the skin. When these larvae, called cercariae, penetrate human skin, they trigger an allergic reaction within 10-15 hours that takes about a week to heal. Cercarial dermatitis, also known as swimmer’s itch or clam-digger’s itch, is caused by the larvae of blood flukes that are parasites of birds or mammals. ![]()
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