The sexual reproductive stage occurs in the definitive host
, which appears to be relatively species constrained.
granulosus, whose definitive host
is a wild canid such as a wolf (Canis lupis) or coyote (C.
Between november 2006 to july 2007, trematode potential definitive hosts
were collected for further investigation of its adult form.
Logistic regression, combined with other observations or data, may be a useful method for the prediction of intermediate and/or paratenic hosts of poorly known parasites when the definitive host
has had ample dietary analysis performed.
Byrd, 1935), which describe snakes as the definitive host
and tadpoles and frogs as second intermediate hosts.
microti shares the same vector tick (Ixodes scapularis), reservoir rodent (the white-footed mouse), and definitive host
(the white-tailed deer) as Borrelia burgdorferi, the Lyme disease spirochete, the pathogens are unrelated and treatment for the two conditions differs.
Another parasite under suspicion for otter deaths is Sarcocystis neurona, whose only definitive host
is the opossum.
The predominant definitive host
for D immitis is a canine, but other mammals, such as cats, foxes, and muskrats, may be infected.
neurona that the opossum (Dideiphis virginiana) is a definitive host
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1) The life cycles of avian filarioids follow the standard filarioid pattern; these invariably involve a vertebrate definitive host
and an invertebrate intermediate host, the latter referred to as the vector.
schneideri in the definitive host
has been described previously (Weinmann et al.
embryonated eggs pass in the feces of the definitive host
and miracidia hatch and penetrate tissues of a snail (first intermediate host).
Pigs are the primary intermediate host, and humans can be either the definitive host
(infected with the tapeworm) or an intermediate host (infected with the cysticercus) (2, 3).
Occurrence of the parasite in moose depends on the presence of a competent definitive host
and suitable aquatic snail intermediate hosts of the genus Lymnaea.