Parasites and hepatic histopathological lesions in lisa (Mugil incilis) from Totumo mash, North of Colombia

Abstract

Objective. To assess the levels of parasitism by nematodes and trematodes, as well as the hepatic histopathological alterations present in Mugil incilis (Lisa) from Totumo marsh, North of Colombia. Materials and methods. Between July 2004 and June 2005, 500 fish were collected at Totumo Marsh (75°16'W and 10°44´N), North of Colombia. Morphometric and parasitic parameters were determined for each specimen, and the hepatic histopathological status of the liver was assessed by analyzing liver slides stained with hematoxylin and eosin. Results. Nematode larvae isolated from Mugil incilis corresponded to Contracaecum spp. Parasite prevalence was 60.49%. Parasitic mean abundance and mean intensity were 4.8±1.05 and 7.02±1.49, nematodes per fish, respectively. The correlation between nematode mean abundance and fish length was significant and positive (r=0.525, p<0.0001), but negative for condition factor (r=-0.109, p=0.014). Hepatic histopathological analysis revealed the presence of encapsulated trematode larvae as the main finding. However, the presence of inflammation, granulomas, steatosis and necrosis, were also registered as secondary alterations. Conclusions. Lisas collected at Totumo Marsh are parasitized with nematodes and trematodes. These fish have different histopathological lesions in the liver tissue, being the most important the presence of trematode encapsulated cyst that generate inflammatory reactions, and negatively correlate with morphometric markers of fish health.Key words: Anisakiasis, fishes, nematode, trematode, zoonoses (Source: CAB). RESUMENObjetivo. Evaluar los niveles de parasitismo por nemátodos y tremátodos, así como las alteraciones histopatológicas hepáticas presentes en Mugil incilis (Lisa) de la Ciénaga del Totumo, Norte de Colombia. Materiales y métodos. Entre Julio de 2004 y Junio de 2005, 500 peces fueron recolectados en la ciénaga del Totumo (75°16'W y 10°44´N), norte de Colombia. Índices morfométricos y parasitarios fueron determinados para cada espécimen, y el estatus histopatológico hepático fue evaluado analizando cortes de hígado teñidos con hematoxilina y eosina. Resultados. Los nemátodos aisladosRev.MVZ Córdoba 18(1):3288-3294, 2013. ORIGINAL 3289de Mugil incilis correspondieron a Contracaecum spp. La prevalencia del parásito fue 60.49%. La abundancia media y la intensidad media parasitaria fueron 4.8±1.05 y 7.02±1.49, larvas por pez, respectivamente. La correlación entre la abundancia media de nemátodos y la longitud de las lisas fue significativa y positiva (r=0.525, p<0.0001), pero negativa para el factor de condición (r=-0.109, p=0.014). El análisis de la histopatología hepática reveló la presencia de larvas encapsuladas de tremátodos, como el hallazgo principal. Sin embargo, la presencia de inflamación, granulomas, esteatosis y necrosis, también fueron registradas como alteraciones secundarias. Conclusiones. Las Lisas colectadas en la ciénaga del Totumo están parasitadas con nemátodos y tremátodos. Estos peces poseen diversas lesiones histopatológicas en el te...

Biochemical and Histopathological Changes in Nile Tilapia, Oreochromis niloticus at Lake of Edku

“…From the most prominent lesions identified in the fish liver include parasitic granuloma (local productive inflammation) showing parasite in the center, hyperplastic cells, macrophage infiltration and surrounded by fibrous tissue probably is the result of a host defense reaction. This is in agreement with (Olivero et al, 2013). The presence of the parasitic granuloma was an inflammatory cell response causing the walling off of the pathogen within the infected tissues (Elkesh et al, 2013), as well as presence of encapsulated parasitic cysts by connective tissue as shown in Fig.,(3).…”

Study of some ecological parameters in nematode parasites of freshwater fish in the Senegal and Gambia rivers

“…Our results confirm those of Sinare et al (2021) [31] , indicating that during the dry season, the reduction in water surface leads to contacts among different hosts, as well as those found in Otolithoides pama from the Bay of Bengal (Priyanka et al 2019) [30] and Mugil cephalus in Senegal (Dione et al 2014) [11] . However, the opposite has been reported by other authors (Olivero-Verbel et al 2013, Sinare et al 2021) [29,31] . Ibiwoye et al (2005) [19] note a high infestation of fish at the beginning of the rainy season due to their weakening during hibernation.…”

Anisakis physeteris y Pseudoterranova decipiens en el pez Mugil Curema comercializado en Tumaco, Colombia

“…El pez Lisa (M. curema), de la familia Mugilidae se distribuye ampliamente en el Océano Pacífico, desde la costa de California en los Estados Unidos hasta el sur de Chile (22). Esta especie habita en aguas costeras y estuarinas; por su tipo de alimentación, varios autores la han clasificado como detritívora, iliófaga, herbívora, omnívora y fitófaga (23), comportamientos alimentarios que favorecen las infecciones por parásitos y es así como los Mugílidos constituyen la familia de peces con mayor número de reportes de anisakidos (17,21,22,23,24,25,26).…”