| gnathostoma infection in fish caught for local consumption in nakhon nayok province, thailand i. prevalence and fish species. | between august 2000 and august 2001, 12,216 fish of 73 species were purchased from several local markets in nakhon nayok province, thailand, and examined for the presence of gnathostoma larvae. almost all species were fresh-water fish that had grown naturally, rather than raised commercially. eight species were found to be infected with gnathostome larvae. the overall prevalence was 5.1% (626/12,216) and a total of 5,969 larvae was recovered. the highest rate of infection (30.1 %) was found in m ... | 2004 | 15689060 |