Detection Of Helminth Endoparasites From Selected Marketable Nile Tilapia (Oreochromis niloticus) And Galunggong (Decapterus maruadsi) Collected From Zapote Market, Bacoor, Cavite Ma. Elisa L. Laddaran, and Hazel Anne L. Tabo, MS Biological Sciences Department, College of Science, De La Salle University-Dasmarinas Introduction Parasites of fish constitute one of the major problems confronting modern fish culturists and pathological conditions arising from parasite infections. It assumes a high level especially under crowded conditions (Van Dan Broek 1979). Commonly, nile tilapia (O. iloticus) and galunggong (D. maruadsi) are staple fish food and common preference among Filipinos because of its affordability and availability in the Philippines. However, galunggong and tilapia are said to have endoparasites which may cause illness to people if eaten raw or undercooked. Since host fishes are commonly consumed by Filipinos, parasitesrelated or associated diseases can be warranted especially if these fishes are unsanitarily prepared or eaten half-cooked. This study is conceived as it warrants public health awareness and fish hosts are common to human consumption.
A study of parasites and their prevalence in O. niloticus and D. maruadsi are useful if the species of fish is of aquacultural interest and commonly consumed by Filipinos. Name of Parasite Anisakis simplex Eimeria spp. Unknown Protozoan Not infected Total Results and Discussion Table 1. Incidences of endoparasites in O. niloticus and D. maruadsi Form Larvae Cyst Cyst Infected O. niloticus 0 (0%) 1 (6. 67%) 9 (60. 0%) 5 (33. 33%) 15 Infected D. maruadsi 15 (100%) 0 (0. 0%) 0 (0. 0%) 0 (0. 0%) 15 Table 1. shows that All of the samples of D. aruadsi are found to have the larvae form of Anisakis simplex. There are 10 hosts of O. niloticus infected with of Eimeria spp. which was 6. 67% while the unknown protozoan was 60. 0% which means that majority of the endoparasites that are found inside the intestinal organs of O. niloticus were unknown protozoan cyst. No helminthes were found in O. niloticus. Table 2. Statistical result between O. niloticus and D. maruadsi endoparasites Decapterus maruadsi Oreochromis niloticus 0 4 61 2. 36 x 10-307 ~ 0. 002 Materials and Methods Collection of Samples Chi-square Analysis
Anisakid larvae Eimeriaoocyst Protozoan cyst 165 0 0 Fish Preparation Calculation of Parasite Distribution X2 value Dissection Recovery of Endoparasites Table 2. shows the incidences of different species of parasites recovered from the sample fishes. Recovered parasites in D. maruadsi which is a larvae form of Anisakis sp. has a total of one hundred sixty five species of Anisakid larvae inside the intestines of the host. Oreochromis niloticus has five oocyst of Eimeria sp. and sixty one cyst of unknown protozoan. Chi-square analysis results to a value that is 2. 6 x 10-307 which means that there is a significant difference between the parasite distributions of O. niloticus and D. maruadsi. Conclusion Statistical Analysis Parasite incidence in O. niloticus Chi-square Analysis Parasite incidence in D. maruadsi Intestinal organs of O. niloticus that are brought from Zapote Market were predominated with unknown protozoan cysts (60%) and Eimeria oocysts (6. 67%) and no helminthic parasite were found in contrast with D. maruadsi that are infected with Anisakis simplex larvae (100%). The result of statistical analysis shows that there is a significant difference (P