561 |
Aedes aegypti population dynamics : the effects of food availability and experimentally induced mortality of late instar larvaeCermark, Paul M. January 1998 (has links)
No description available.
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562 |
The influence of energy-restriction on accumulation of Heligmosomoides polygyrus (Nematoda) in outbred CD-1 mice in free-running arenasDare, Oluwayemisi Katherine January 2003 (has links)
No description available.
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563 |
The effects of nutrition deficiency as a causal agent of population cycling and the impact of various densities of Plagiorchis elegans on the population structure of Aedes aegypti pre-imagos /Hartley, Bruce J. January 1996 (has links)
No description available.
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564 |
Population dynamics of Anisakis simplex in harbour porpoise (Phocoena Phocoena) from the Gulf of St. LawrenceSimard, Manon. January 1997 (has links)
No description available.
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565 |
Echinococcus granulosus (Cestoda : Taeniidae) infections in moose (Alces alces) from southwestern QuebecMcNeill, Marilyn Anne. January 1982 (has links)
No description available.
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566 |
White Blood Cell Counts, Parasite Prevalence, and Plasma Cortisol Levels of Dogs in a County Animal Shelter: Changes over Days and Impact of a Program of Repeated Human InteractionDudley, Emily S. 07 August 2014 (has links)
No description available.
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567 |
The effect of Trichinella pseudospiralis infection on mate choice and competitive abilities of captive American kestrels /Henderson, Derin January 1992 (has links)
No description available.
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568 |
Predatory behaviour of American kestrels and effects of Trichinella pseudospiralis infectionBombardier, Manon January 1992 (has links)
No description available.
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569 |
The interaction of dietary protein and zinc deficiencies with Heligmosomoides polygyrus infection in mice /Boulay, Marjolaine January 1994 (has links)
No description available.
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570 |
Effect of Metabolic Enzymes on Amylopectin Content and Infectivity of Cryptosporidium parvumHartman, Angela Danielle 09 December 2006 (has links)
Amylopectin granules in Apicomplexan protozoa are hypothesized to be used as an energy source to aid the parasites in surviving in the environment allow latent stages to excyst and release infective stages, allow them to be mobile, invade host cells, and to continue their life cycle. The objective of this project was to determine if parasite glycolytic enzymes: alpha-amylase, amyloglucosidase, enolase, lactate dehydrogenase, and phosphorylase could be used to decrease amylopectin stores and subsequently infectivity of Cryptosporidium parvum oocysts/sporozoites in both fresh oocysts and stored oocysts. In addition, glycolytic enzymes and substrates: glucose, glucose-1-phosphate, and glycogen synthase were investigated to determine if they can be used to increase amylopectin stores and thus increase infectivity to aid in detection/storage of oocysts. Oocysts of Cryptosporidium parvum were suspended in 1mg/ml glycolytic enzymes or substrates (except glucose - 0.05M and glycogen synthase - 1U/ml) and electroporated. Oocysts were incubated at 37°C for one hour to allow treatments to react with amylopectin followed by incubation on HCT-8 cells for 24 hours for infection. Real-time PCR and immunohistochemistry were performed to determine the effect of the enzymes on infectivity. An amylopectin assay and excystation assay was performed to determine if the enzymes degraded amylopectin and if decreased amylopectin reduced excystation. Alpha amylase and amyloglucosidase had the greatest impact on reducing both amylopectin and infectivity of fresh oocysts with reductions of 99.5% and 99.1% in infective oocysts, respectively (P<0.05). These results suggest that amylopectin may be an important factor in infection, although further research is needed. In stored oocysts, enzymes significantly reduced amylopectin content but not infectivity. In fresh oocysts, amylopectin content was correlated to excystation and infectivity with a decrease in amylopectin correlating to decreased excystation and infectivity. In contrast, there was no direct correlation for stored oocysts. When glucose, glucose-1-phosphate, or glycogen synthase was used to increase infectivity, results show that glycogen synthase had little effect, but glucose and glucose-1-phosphate significantly increased amylopectin content, excystation, and infectivity. In conclusion, amylopectin may be an important polysaccharide store of Cryptosporidium parasites to cause infection by allowing excystation of the oocysts to release infective sporozoites. / Ph. D.
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