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Despite the economic importance of sea lice, comparatively little is known about the nature of their host-parasite relationship.
The development of pesticide resistance in sea lice populations has been demonstrated for hydrogen peroxide and dichlorvos.
To date only a small amount of work on bioactive molecules produced by fish lice has been undertaken.
Few authors have looked at the antibody response of fish that are naturally infected with fish lice.
We have, on the other hand, conclusive proof that lice are concerned in the transmission of the disease.
The abundance of lice was lower in 2001.
You yourself should know what difficulties lice provide aboard a ship and what a giant work is needed to get rid of them.
One form is made up of asexually reproducing female lice which live permanently underground.
The feather lice or biting lice found on birds cannot be combed out from their hosts, which is the method suggested for the previously-mentioned insects.
Monkeys inoculated with the contents of lice, crushed on the 15th day after the infective feed, developed relapsing fever.
The authors infected monkeys and mice with the spirochaetes obtained from human cases of relapsing fever, but failed to transmit infection by means of lice.
How frequently do avian lice miss the boat ?
Firstly, farmed lice are periodically or continuously exposed to pesticides.
Rats, including the ears, were examined for ectoparasites (fleas, lice, mites and ticks) and collected by fine-toothcombing.
1.48) times more males than females were present in the lice samples.
