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Pathology of schistosome infection in mice and vector snailsSoomro, Noor Mohammad January 1996 (has links)
No description available.
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The selection of sheep resistant to nematode infectionHughes, Suzanne January 1995 (has links)
No description available.
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Nematodes Parasitic in Suncus Murinus and Bandicota Nemorivaga from FormosaSapong, Debra January 1963 (has links)
No description available.
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Biological studies on the hemoflagellates of Oregon marine fishes and their potential leech vectorsBurreson, Eugene Michael 08 April 1975 (has links)
Of 2,122 marine fishes belonging to 36 species collected in the
vicinity of Newport, Oregon, 541 belonging to 8 species were infected
with hemoflagellates. Four species of trypanosomes and three species
of cryptobias were found in offshore fishes, but no hemoflagellates
were observed in fishes from Yaquina Bay.
Trypanosoma pacifica was found in 177 of 1,102 Parophrys
vetulus, 3 of 84 Citharichthys sordidus, and 1 of 35 Lyopsetta exilis,
and survived in 10 other species after intraperitoneal injection. The
host-specificity observed in nature was probably the result of selective
feeding by the leech vector, possibly Oceanobdella sp. or Johanssonia
sp. Division stages of T. pacifica were observed in the fish host and
described. The growth rate of juvenile P. vetulus injected with T.
pacifica was less than that of uninfected individuals for a 10 week
period, after which the growth rates of the two groups were
equivalent.
Trypanosoma gargantua was found in 3 of 7 Raja binoculata and
the vector was shown to be the leech Orientobdella sp.
Two unidentified trypanosomes were observed, one from 21 of
1,102 P. vetulus, 24 of 303 Eopsetta jordani, and 6 of 61 Microstomus
pacificus, and the other from 4 of 35 L. exilis.
A small, active cryptobiid was found in 106 of 303 E. jordani,
51 of 1,102 P. vetulus, and a similar but larger flagellate in 9 of 35
L. exilis. After intraperitoneal injection flagellates from E. jordani
did not survive in P. vetulus, but did survive in other flatfishes;
flagellates from L. exilis survived in P. vetulus, but not E. jordani,
indicating the possible presence of two species, one in E. jordani and
one in P. vetulus and L. exilis.
A larger, sluggish cryptobiid was found in 134 of 1,102 P.
vetulus.
An extremely large cryptobiid, grossly different morphologically
from previously described species, was observed in 1 of 5
Scorpaenichthys marmoratus. The developmental cycle in the leech
vector Malmiana sp. was described; the leech Trachelobdella sp. was
also shown to be a potential vector.
Leeches belonging to the following genera were collected during
this study: Johanssonia, two species; Malmiana, three species;
Trachelobdella, Oceanobdella, Orientobdella, and Ostreobdella. Of
these, one species of Malmiana and one of Orientobdella were experimentally
shown to be vectors of hemoflagellates. / Graduation date: 1975
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Biology of the microsporidan parasite, Pleistophora sp., in three species of Crangonid sand shrimpBreed, Gail Miner 16 September 1976 (has links)
The microsporidan Pleistophora sp. is a common parasite of
Crangon franciscorum, C. nigricauda, and C. stylirostris in the
vicinity of Yaquina Bay, Oregon. Characteristics of the parasite are
described. Skeletal muscle was the only host tissue infected.
The seasonal prevalence and intensity of the parasite in
crangonids are described, based on examination of 1,556 C. franciscorum, 3,877 C. nigricauda, and 1,674 C. stylirostris collected at
monthly intervals from June, 1975, through June, 1976. Prevalence
in C. franciscorum and C. stylirostris increased through the fall and
reached winter peaks of 30.3% and 41.0% respectively, then decreased
in the spring. Prevalence in C. nigricauda remained below 8%
through the year. Intensity increased with size of the shrimp in the
three species.
Infection experiments and field observations indicate that only
very young shrimp are susceptible to infection during a relatively
short period during the summer months. Following initial exposure,
the infection spread within the host, indicating repeated schizogonic
cycles.
Parasitic castration was indicated by the absence of gravid
infected female shrimp and was confirmed by histological examination.
Ovaries of infected shrimp did not develop beyond a very early stage.
A shift in sex ratio toward females in infected shrimp also indicates
that the parasite may influence sex determination.
Shrimp showed little cellular response to infection. Only
rarely in heavily infected shrimp was encapsulation of the parasite
cysts observed, and necrotic tissue was occasionally observed.
Infected shrimp succumbed before uninfected shrimp under low
oxygen stress. The collection of unusually large infected shrimp
indicates that these shrimp either experienced accelerated growth or
lived longer than uninfected shrimp. / Graduation date: 1977
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Granulocyte éosinophileRaffi, Hélène Bret-Bennis, Lydie January 2008 (has links) (PDF)
Reproduction de : Thèse d'exercice : Médecine vétérinaire : Toulouse 3 : 2008. / Titre provenant de l'écran titre. Bibliogr. p. 205-247.
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Nematodes Parasitic in Suncus Murinus and Bandicota Nemorivaga from FormosaSapong, Debra January 1963 (has links)
The following work is based on the study of some nematodes collected in Formosa from two hosts , Suncua murinus and Bandicota nemorivaga . It deals with the taxonomy of the nematodes , with their hosts and with their geographical distribution range .
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Pathogenicity of axenically cultivated Entamoeba histolytica in the hamster.Ghadirian, Esfandiar. January 1978 (has links)
No description available.
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A study of the epifauna on the leaves of Thalassia testudinum KÜnig in Barbados/Hollingworth, Charles Edward January 1974 (has links)
No description available.
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A molecular analysis of Leishmania chagasi and Leishmania infantum tropismsPonce, Maiza Campos January 2001 (has links)
No description available.
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