Cestodes are hermaphroditic flatworms (tapeworms) consisting of a scolex, neck region, and repeating segments. Cestodes lack a mouth, intestine, and body cavity. Life cycles are indirect, with the definitive host acquiring the adult form of the tapeworm by the ingestion of the larval metacestode sta...

Helminth parasite infection of the canine and feline respiratory tract is uncommon in North America. This article reviews the prevalence, etiology, diagnosis, and treatment of helminth parasite infections in dogs and cats. The diagnosis of parasitic infections caused by helminth parasites of the res...

The pathophysiologic responses of 13 sheep inoculated orally with 100 metacercariae of Fascioloides magna were monitored for 4 months after inoculation. There were no differences in weight gains between these and a number of noninoculated control sheep throughout the experiment. Complete blood cell ...

Between August 1992 and November 1995, 31 moribund or dead common loons (Gavia immer) found in the three Maritime provinces of Canada (New Brunswick, Nova Scotia, Prince Edward Island) were necropsied. Eight of these birds were in good body condition and died acutely from drowning or trauma. The rem...

Described are the first antemortem diagnosis made via fecal examination using the Baermann technique and the first postmortem recovery of endemic Angiostrongylus vasorum in dogs from North America, specifically the Avalon peninsula of Newfoundland. In one dog, A. vasorum was recovered and identified...

Life-span and reproductive capacity of sea lice, Lepeophtheirus salmonis, were investigated in artificial seawater (Instant OceanReg.) under laboratory conditions. Sea lice were maintained on Atlantic salmon (Salmo salar) in recirculation systems for as long as 7 months. During this period sea lice ...

Experiments involving 200 rainbow trout showed that host defence mechanisms in sea lice-infested fish are impaired, predisposing fish to subsequent infections to a second pathogen, such as the microsporidian parasite Loma salmonae. Macrophage impairment in lice-infested fish occurred when sea lice b...

Angiostrongylus vasorum, French Heartworm, is a metastrongylid nematode infecting the pulmonary arteries and right heart of wild and domestic canids in various regions of the world. Infection in dogs can result in fatal cardiopulmonary disease. A single endemic focus of A. vasorum in North America o...

The effects of Lepeophtheirus salmonis, on non-specific defence mechanisms in Salmo salar, were determined by experimentally infesting 180 hatchery-reared post-smolts with laboratory-grown infective copepodids at moderate to high infection intensities ranging from 15 to 285 lice per fish. The effect...

Members of an Ahousaht First Nations community of Vancouver Island, Canada have developed a market for wild-caught species of indigenous rockfish (Sebastes spp.). The fish, which are caught by hook and line, are transported live to fish markets in Vancouver. Recently, market place downgrading of the...

The roles of water temperature, flow, and agitation on the development and settlement of sea lice (Lepeophtheirus salmonis) on their Atlantic salmon (Salmo salar) hosts were investigated in the laboratory. In the first phase, fish were exposed to 5, 10, or 15 degree C and increased water-flow (18 L/...

The roles of water temperature, flow and agitation on the development and settlement of sea lice on their Atlantic salmon hosts were investigated in the laboratory. In the first phase, fish were exposed to 5, 10 or 15 degrees C and increased water-flow (18 vs. 6 litre/min). In the second phase, fish...

Beach surveys for harp (Phoca groenlaandica) and hooded (Cystophora cristata) seals documented a dramatic increase in their numbers on Sable Island in mid 1990s. In the 1980s, no more than five animals of both species were observed on this island each year, however, during late 1994 to 1998, 1,191 h...

Tissue samples and feces were collected from a dead, adult female coyote (Canis latrans) found at the side of the road in late March 2003 in the Avalon Peninsula region of Newfoundland, Canada. The coyote apparently died of vehicular-related trauma. Samples of lung, brain, heart, liver, and kidney w...

Crenosoma vulpis and Eucoleus aerophilus are nematode parasites that can cause verminous pneumonia in wild carnivores. There is a paucity of information regarding the distribution of parasites in the lungs and the relationship between histopathological and parasitological diagnoses in naturally infe...

Crenosoma vulpis and Eucoleus aerophilus are 2 important lung nematodes of wild and domestic carnivores. A recent report underscored the severity of bronchial gland hyperplasia and bronchiolar metaplasia in parasitized foxes. The objective of this study was to quantify the degree of bronchial gland ...