| a mallophaga, trinoton anserinum, as a cyclodevelopmental vector for a heartworm parasite of waterfowl. | the biting louse trinoton anserinum serves as the intermediate host in the life cycle of the filarial heartworm, sarconema eurycerca. microfilariae, second-, and third-stage larvae were dissected from 39 of 89 lice infesting whistling swans, cygnus columbianus columbianus, in north america and mute swans, cygnus olor, in the black sea, u.s.s.r. infective third-stage larvae obtained from lice collected from heartworm-parasitized whistling swans were injected subcutaneously into each of two hand-r ... | 1976 | 982042 |
| the louse trinoton anserinum (amblycera: phthiraptera), an intermediate host of sarconema eurycerca (filarioidea: nematoda), a heartworm of swans. | the role of the louse trinoton anserinum (f) as an intermediate host of sarconema eurycerca (wehr) was investigated in swans. 8.3% of healthy swans carried one to twelve lice per bird, dispersed contagiously. injured and lead-poisoned swans were more heavily infected. the mouthparts appear designed to penetrate the hosts' skin; the mandibles are robust and asymmetric, and the maxillae have a serrated intercutting surface. 22% fed exclusively on blood and 33% on both blood and feather. all life-c ... | 1991 | 1768889 |
| lead poisoning and parasitism in a flock of mute swans (cygnus olor) in scotland. | increased mortality in a flock of non-breeding mute swans (cygnus olor) on a scottish loch was investigated. postmortem examinations were carried out on eight adult and six immature swans. the commonest cause of death, found in eight birds, was lead poisoning associated with the ingestion of large lead fishing weights. heavy parasitic burdens were found in five immature birds, involving combinations of the gizzard worm amidostomum species, the thornyheaded worms polymorphus minutus and profilico ... | 1998 | 9460217 |