Search Results - "VanLeeuwen, J"

Evaluation of influence of milk urea nitrogen on reproductive performance in smallholder dairy farms by Kananub, S, Pechkerd, P, VanLeeuwen, J, Stryhn, H, Arunvipas, P

“…Objective The aim of this study was to determine the relationship between milk urea nitrogen (MUN) and reproductive performance in dairy cows in western…”
Get full text

A systematic review and meta-analysis of factors associated with anthelmintic resistance in sheep by Falzon, L.C., O’Neill, T.J., Menzies, P.I., Peregrine, A.S., Jones-Bitton, A., vanLeeuwen, J., Mederos, A.

“…Anthelmintic drugs have been widely used in sheep as a cost-effective means for gastro-intestinal nematode (GIN) control. However, growing anthelmintic…”
Get full text

Randomized control trial to investigate compliance with, and impacts of, cow comfort recommendations on smallholder dairy farms in Kenya by Kariuki, E.N., VanLeeuwen, J.A., McKenna, S.L., Heider, L.C., Gitau, G.K., Muasya, D.W.

“…Smallholder dairy farmers (SDF) in developing countries often have limited understanding on the importance of cow comfort. We conducted a randomized controlled…”
Get full text

Management factors associated with time-to-onset and fecal egg/oocyst counts of gastrointestinal parasites in heifer calves on Kenyan smallholder farms by Kimeli, P, VanLeeuwen, J, Gitau, GK, Heider, LC, McKenna, SL, Greenwood, SJ

“…•Helminths with strongyle-type eggs and coccidia were the most common endoparasites.•Coccidia had shorter time-to-onset (TTO) of infection as compared to…”
Get full text

Evaluation of environmental and comfort improvements on affective welfare in heifer calves on smallholder dairy farms by Kimeli, P., VanLeeuwen, J., Gitau, G.K., Heider, L.C., McKenna, S.L., Greenwood, S.J., Richards, S.

“…A controlled trial on zero-grazed smallholder dairy farms was conducted to determine the effect of environmental and comfort improvements on sucking and lying…”
Get full text

Anthelmintic resistance in sheep flocks in Ontario, Canada by Falzon, L.C., Menzies, P.I., Shakya, K.P., Jones-Bitton, A., Vanleeuwen, J., Avula, J., Stewart, H., Jansen, J.T., Taylor, M.A., Learmount, J., Peregrine, A.S.

“…Gastrointestinal nematodes (GIN) are a significant constraint to pasture-based sheep production worldwide. Anthelmintic resistance (AR) has been reported in…”
Get full text

Effects of Calliandra and Sesbania supplementation on weight gain in dairy calves on smallholder farms in Kenya by Makau, D.N., VanLeeuwen, J.A., Gitau, G.K., McKenna, S.L., Walton, C., Muraya, J., Wichtel, J.J.

“…The growth rate of female calves on dairy farms is one of the crucial factors which influence age at first calving, affecting lifetime lactation productivity…”
Get full text

Animal and management factors associated with weight gain in dairy calves and heifers on smallholder dairy farms in Kenya by Makau, D.N., VanLeeuwen, J.A., Gitau, G.K., Muraya, J., McKenna, S.L., Walton, C., Wichtel, J.J.

“…Calf growth is an important determinant of dairy herd productivity, particularly in countries where the dairy industry is expanding, such as Kenya. Our…”
Get full text

Risk factors associated with cows' lying time, stall and cows' own cleanliness in smallholder dairy farms in Kenya by Kathambi, E K, VanLeeuwen, J A, Gitau, G K, Kamunde, C

“…The welfare of animals kept in livestock production systems has raised concerns around the world. Adult dairy cattle require adequate rest and spend…”
Get full text

Production effects of pathogens causing bovine leukosis, bovine viral diarrhea, paratuberculosis, and neosporosis by Tiwari, A, Vanleeuwen, J A, Dohoo, I R, Keefe, G P, Haddad, J P, Tremblay, R, Scott, H M, Whiting, T

“…The primary purpose of this research was to determine associations among seropositivity for bovine leukemia virus (BLV), bovine viral diarrhea virus (BVDV),…”
Get more information

Identification of effective treatment criteria for use in targeted selective treatment programs to control haemonchosis in periparturient ewes in Ontario, Canada by Westers, T., Jones-Bitton, A., Menzies, P., VanLeeuwen, J., Poljak, Z., Peregrine, A.S.

“…Haemonchosis is often associated with late gestation and parturition in ewes in Canada. Due to widespread concerns about development of anthelmintic resistance…”
Get full text

Effects of Calliandra and Sesbania on Daily Milk Production in Dairy Cows on Commercial Smallholder Farms in Kenya by Wichtel, J. J., Walton, C., McKenna, S. L., Gitau, G. K., VanLeeuwen, John, Makau, D. N., Muraya, J.

“…There is a growing interest in protein supplementation of dairy-cow diets using leguminous shrubs. The study objective was to ascertain the association between…”
Get full text

Assessment of Effectiveness of Control Strategies Against Simulated Outbreaks of Highly Pathogenic Avian Influenza in Ontario, Canada by Lewis, N., Dorjee, S., Dubé, C., VanLeeuwen, J., Sanchez, J.

“…Summary The North American Animal Disease Spread Model (NAADSM) is a stochastic model framework developed to simulate the spread of highly contagious diseases…”
Get full text

Prevalence and distribution of gastrointestinal nematodes on 32 organic and conventional commercial sheep farms in Ontario and Quebec, Canada (2006–2008) by Mederos, A., Fernández, S., VanLeeuwen, J., Peregrine, A.S., Kelton, D., Menzies, P., LeBoeuf, A., Martin, R.

“…In order to characterize the epidemiology of sheep gastrointestinal nematodes in organic and conventional flocks in Canada, a longitudinal study was carried…”
Get full text

Evaluation of the utility of subjective clinical parameters for estimating fecal egg counts and packed cell volume in Canadian sheep flocks by Mederos, A., Kelton, D., Peregrine, A.S., VanLeeuwen, J., Fernández, S., LeBoeuf, A., Menzies, P., Martin, R.

“…•We studied clinical parameters to estimate gastrointestinal nematode burden in sheep.•Mixed linear models with random effects were fitted to correlate the…”
Get full text

Monensin use against Neospora caninum challenge in dairy cattle by VanLeeuwen, J.A., Greenwood, S., Clark, F., Acorn, A., Markham, F., McCarron, J., O’Handley, R.

“…Using a randomized controlled trial design, a randomly allocated intervention group of 15 cows received a slow-release bolus that delivered 100 days of…”
Get full text

A systematic review-meta-analysis of primary research investigating the effect of selected alternative treatments on gastrointestinal nematodes in sheep under field conditions by Mederos, A., Waddell, L., Sánchez, J., Kelton, D., Peregrine, A.S., Menzies, P., VanLeeuwen, J., Rajić, A.

“…Selected alternative treatments for preventing or controlling gastrointestinal nematodes (GIN) in sheep under field conditions were evaluated using a…”
Get full text

Cow-level prevalence of paratuberculosis in culled dairy cows in Atlantic Canada and Maine by McKenna, S L B, Keefe, G P, Barkema, H W, McClure, J, Vanleeuwen, J A, Hanna, P, Sockett, D C

“…The prevalence of Mycobacterium avium ssp. paratuberculosis (Mptb) in culled dairy cattle in Eastern Canada and Maine was determined to be 16.1% (95%…”
Get more information

EFFECT OF NUTRITION EDUCATION AND DAIRY GROUP MEMBERSHIP ON NUTRITION KNOWLEDGE, PRACTICES AND DIET QUALITY FOR RURAL KENYAN FARM WOMEN by Walton, C, VanLeeuwen, J, MacLellan, D, Taylor, J, Mbugua, S

“…The typical high-starch, low diversity diet in developing countries is associated with undernutrition, morbidity and mortality. Previous research with…”
Get full text

Risk factors associated with Mycobacterium avium subspecies paratuberculosis seropositivity in Canadian dairy cows and herds by Tiwari, A., VanLeeuwen, J.A., Dohoo, I.R., Keefe, G.P., Haddad, J.P., Scott, H.M., Whiting, T.

“…Our objective was to determine the risk factors associated with the seroprevalence of Mycobacterium avium subspecies paratuberculosis (MAP) in a large number…”
Get full text