Prevalence investigation of Cestoidea contamination in marine shrimp inthe coasts of the city of Bushehr

In Cestodiasis disease in shrimp, shrimp is intermediate hosts of the parasites inthree genera Prochristanla, Parachristianla and Polyposefalus and their adult kindscan be seen in fish. Usually the adult parasites are seen in the place of the digestiveglands, while they are sunken in to them. In shrimp, the larvae of parasite can beseen in the hepatopancreas tissues and its surrounding. The larvae of this parasiteswhich exists in the surrounding tissues of hepatopancreas and the other tissues ofshrimp, can be seen with the naked eye. There are also likely to see the eggs ofparasites in shrimp muscles. This type of contamination due to strain to theabdominal area of shrimp, and partially destruction of tissues, especially thehepatopancreas tissue, and also using of food reserves of shrimp from the otherparts, causes reduce of growth and weaken the body against the other illnesses, sowith passing the time, can even cause the death of shrimps. Given the above, themain aim of the present study is investigation of the infection rate of cestodiapollution in marine shrimps in the coasts of the city of Bushehr.Methods: for this study, ۱۰۰ pieces of marine shrimps were haunted from thecoasts of Bushehr, in summer. Since the marine shrimp fishing is just allowed insummer season, so this season was selected for the shrimp fishing. The huntedshrimps had various ages, since hunting was done randomly. Immediately afterhunting, the shrimps were fixed by using the fixative solution (Davidson‟s fixative),then they were transferred to the Kazeroon laboratory and histopathologicalsections, were prepared from them.Results: By investigation of prepared samples, no cestodia parasitic pollution wasobserved in hunted shrimp. Histological studies showed that ۴% of observationsrelate to artifacts, ۱۰% relate to lymphocytes, ۱۰% to the accumulation ofmononuclear, ۳۳% to the melanization, ۴۱% to the gill hyperplasia and ۲% relatesto the other observations.Conclusions: the global reporting of parasitic pollution is low; the main cause ofthis low level of research is the low amount of damages caused by worms inshrimp. It means; these organisms are not able to create large damages and losses inshrimp population in the city of Bushehr.

Keywords:

prevalence , Cestodiasis disease , marine shrimp , Bushehr