Results 201 to 210 of about 31,926 (241)

Gastrointestinal nematodes in Quebec dairy cattle

The Bovine Practitioner, 2002
A cross-sectional observational study was undertaken in Qu‚bec dairy herds to evaluate regional and provincial prevalences of herds with gastrointestinal nematode (GIN) infections in lactating cows, and to determine risk factors associated with level of herd infection.
Caldwell, Vincent, DesCoteaux, Luc, Bouchard, Emile, DuTremblay, Denis, Dohoo, Ian R., Markham, Fred   +5 more
openaire   +1 more source

Gastrointestinal nematodes in dogs from Debre Zeit, Ethiopia

Veterinary Parasitology, 2007
The study was conducted during the period between January 2005 and June 2006 to determine the frequency of gastrointestinal (GI) nematode infections of dogs in and around Debre Zeit, using qualitative and quantitative coprological (N = 100) and postmortem examinations (N = 20). By coproscopy 51% dogs were positive for different types of nematodal eggs,
H T, Yacob, T, Ayele, R, Fikru, A K, Basu   +3 more
openaire   +2 more sources

Controlling gastrointestinal nematodes in cattle by Bacillus species

Veterinary Parasitology, 2017
In this study, we tested the in vitro and in vivo larvicidal activity of Bacillus species against gastrointestinal nematodes in cattle, and their viability in the presence of anthelmintics. For in vitro tests, cattle feces naturally infected with trichostrongylides were incubated with spore suspensions of Bacillus circulans (Bcir), B. thuringiensis var.
Natália Berne, Pinto, Leonardo Mortagua, de Castro, Gabriela, de Almeida Capella, Tairan Ourique, Motta, Ana Paula, de Souza Stori de Lara, Micaele Quintana, de Moura, Maria Elisabeth Aires, Berne, Fábio Pereira Leivas, Leite   +7 more
openaire   +2 more sources

Gastrointestinal nematode infection increases organophosphate toxicity in rats

Toxicology Letters, 2008
Serum paraoxonase-1 (PON1) is an esterase associated with high-density lipoproteins in plasma and is involved in the detoxification of organophosphates (OP). We have previously reported a significant decrease in serum PON1 activity following Nippostrongylus brasiliensis infection in Wistar rats.
Ayman Samir, Farid, Yoichiro, Horii
openaire   +2 more sources

Estimating Transmission Potential in Gastrointestinal Nematodes (Order: Strongylida)

Journal of Parasitology, 2001
Microparasite virulence (the potential to cause harm in the host) is thought to be regulated by a direct trade-off with pathogen transmission potential, but it is unclear whether similar trade-offs occur in macroparasites (helminths). In this analysis, the transmission potentials of 5 nematode species (order Strongylida), known to differ in their ...
D L, Medica, M V, Sukhdeo
openaire   +2 more sources

Efficacy of moxidectin against gastrointestinal nematodes of cattle

Veterinary Record, 1992
Three groups of 11 naturally infected crossbred beef calves were injected subcutaneously with moxidectin 1 per cent injectable at 0.2 or 0.3 mg moxidectin/kg bodyweight or with the unmedicated vehicle. Nematode infections had been acquired during grazing from December to April.
J C, Williams, S A, Barras, G T, Wang
openaire   +2 more sources

An evolutionary perspective on gastrointestinal nematodes of sheep

Journal of Helminthology, 2011
AbstractThe purpose of this paper was to discuss from an evolutionary perspective the interaction between domestic sheep (Ovis aries)and their gastrointestinal nematodes. Although evolution is the central theme of biology, there has been little attempt to consider how evolutionary forces have shaped and continue to shape the relationships between ...
Stear, M. J., Singleton, D., Matthews, L.   +2 more
openaire   +3 more sources

Nonpathogenic Nematodes in Gastrointestinal Aspirates Obtained During Endoscopy

Journal of Clinical Gastroenterology, 1987
The gastroenterologist must be alert to diagnosing parasitic diseases when collecting intestinal fluid samples or cytologies during endoscopy. Between 1979 and 1982, we identified nematodes in 10 endoscopic specimens. None were Strongyloides stercoralis.
J T, Schwartz, J E, Clarridge, D Y, Graham   +2 more
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The immunobiology of gastrointestinal nematode infections in ruminants

2000
The major gastrointestinal nematode parasites of ruminants all belong to the Order Strongylida and the family Trichostrongyloidea. Despite this close evolutionary relationship, distinct differences exist in the microenvironmental niches occupied by the developmental stages of the various parasites, which may account for the variable susceptibility of ...
A, Balic, V M, Bowles, E N, Meeusen
openaire   +2 more sources

Production of vaccines against gastrointestinal nematodes of livestock

Immunology & Cell Biology, 1993
SummaryThree international collaborations involving Australian research scientists are currently developing vaccines against Haemonchus, Trichostrongylus and Ostertagia parasites using recombinant DNA technology. The variety of protective antigens identified can be classified as ‘conventional’ (stimulate naturally acquired immunity) or ‘novel/’covert‘/’
D L, Emery, S J, McClure, B M, Wagland
openaire   +2 more sources