Location and development of larvae of Contracaecum rudolphii Hartwich, 1964 (Nematoda: Anisakidae) in experimentally infected asps Leuciscus aspius (Linnaeus, 1758) (Pisces: Cyprinidae)

Abstract

Laboratory-reproduced and bred asps were experimentally infected with Contracaecum rudolphii larvae, either directly or with previously infected copepods. In the fish exposed to larval infection, the intensity and prevalence of infection were noticeably higher than in the group exposed to copepods. The course of larvae development was similar in both groups. In the larvae measuring ca. 1000 µm in length, the gastrointestinal tract with a developed ventriculus, ventricular appendix and intestinal caecum was clearly visible. The mouth was surrounded by three

The Influence of Contracaecum larvae (Nematoda, Anisakidae) Parasitism on the Population of Prussian carp (Carassius gibelio) in Lake Sakadaš, Croatia

“…The larvae were found inside serosa layer of the gastrointestinal wall of the fish, coiled and surrounded by a layer of connective tissue, completely inactive but with no visible signs of decomposition. Similar findings of Contracaecum larvae were reported in bream ( Abramis brama ) and common carp ( Cyprinus carpio ) [ 18 ] and experimentally infected asps ( Leuciscus aspius ) [ 53 ]. Contracaecum larvae have the tendency to migrate from the intestine to surrounding host’s organs by burrowing through tissue, causing mechanical damage along the way and eliciting an immune response [ 54 , 55 ].…”

First Record of Contracaecum rudolphii Hartwich, 1964 in Carassius gibelio (Bloch, 1782) From Turkey

“…The cosmopolitan Contracaecum rudolphii Hartwich, 1964 has a complex life cycle, involving invertebrates such as copepods, ostracods or gammarids as first intermediate hosts, teleost fish as second intermediate or paratenic host and piscivorous birds e.g. cormorants as final hosts (Bartlett, 1996;Dziekońska-Rynko, Rokicki, Mierzejewska, Wziątek, & Bielecki, 2013).…”

“…Infections of cyprinids under laboratory conditions have been proved by various authors that found nematode three-stage nematode larvae encysted in the intestinal wall or located in the internal organs of the fish (Moravec, 2009;Dziekońska-Rynko et al, 2013).…”