Prevalence and Intensity of Microphaloides spp. in Black Rice Crab, Somanniathelphusasp. from Nakhon Phanom Province, Year 2016

Abstract

    The minute Intestinal fluke, Microphaloides spp. are the important parasites, which can infect to humans and mammal. The importantly intermediate hosts are black rice crab (Somanniathelphusa sp.). They can infect to human or
mammal by eating raw crab. The most people used raw crabs are important ingredient in spicy papaya salads, also affect the high risk of infection in humans. This research aims to investigate the distribution of Microphaloides spp. in 12
districts of Nakhon Phanom Province. The 434 black rice crabs are determined by randomly hand samplings. The result showed that total prevalence was 50.46%. The highest prevalence of infection was Mueang district (87.09%) and followed
by Renu Nakhon, Phon Sawan and Na-Wa districts, equal to 83.33%, 80.00% and 77.27%, respectively. The lowest prevalence was shown in Ban Phaeng district (6.97%). The intensity of parasites found highest in Phon Sawan district
(200.38 per crab), and followed by Na Kae, ThatPhanom and Mueang district equal to 197.42, 178.20 and 129.44 per crab, respectively. The lowest intensity found in Sri Songkram district as 10.60 per crab. From the results the
Microphaloides spp. are highly distribution in Nakhon Phanom province, especially Mueang district which human in this area are highly risk of infection as well.