To study the effects of various doses of Anguillicola crassus in primary infections, parasite-free European eels were orally infected with doses of 0, 1, 5, 10, 20 or 40 third-stage (L3) larvae. The eels were either killed and examined for parasites and lesions after 56 days, or reinfected with 20 L3 larvae to study the effect of primary infection on resistance. Reinfected eels were killed and examined on Day 112. Blood samples were collected weekly and examined in an enzyme-linked immunosorbent assay (ELISA) to detect antibodies against adult parasite cuticula antigen. The mean percentage of A. crassus recovered from eel swimbladders ranged from 14 to 20% on Day 56 and from 9 to 26% on Day 112. There was no significant relation between the proportion of recovered parasites and the primary and/or secondary infection dose. Furthermore, the higher the dose, the more severe were the haemorrhages and pigment spots seen in the swimbladder. Reinfected eels had significantly more severely thickened swimbladders, haemorrhages in the swimbladders and congestion of blood vessels in the swimbladders. Results of the ELISA showed that the eels developed no detectable antibody response against A. crassus . We concluded that under the given stressful experimental conditions, although eels develop pathological signs after primary and secondary infection with A. crassus , they do not develop an antibody response or resistance.
Aquaculture – Elsevier
Published: May 15, 1996
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera