Publications by authors named "Bertrand Christine"

Article Synopsis
  • This study examines the impact of increasing temperatures on dairy cattle fertility and production, focusing on Holstein and Montbeliarde breeds.
  • Genetic correlations showed that while fertility is generally stable across different temperature-humidity conditions, the best reproducers in Holsteins are more negatively impacted by heat stress than in Montbeliarde, highlighting breed differences.
  • Overall, rising temperatures are not expected to worsen the trade-off between production and fertility, but the top-producing animals today may face greater challenges due to heat stress in the future.
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Background: Heat stress negatively influences cattle welfare, health and productivity. To cope with the forecasted increases in temperature and heat waves frequency, identifying high-producing animals that are tolerant to heat is of capital importance to maintain milk production. This study, based on the joint analysis of on-farm performance and weather data, had two objectives: (1) to determine the response in production performances (milk, fat and protein yields, fat and protein contents) and udder health (somatic cell score) to temperature-humidity index (THI) variations in Montbeliarde cows, and (2) to estimate the interactions between genotype and THI, to enable the identification of the most adapted animals for facing the expected increases in temperature.

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Background: COVID-19 affected healthcare worldwide, limited access to healthcare, and delayed cancer screening and diagnosis. In this study, the effect of the first year of COVID-19 was determined on cancer diagnoses in the province of Quebec, Canada.

Methods: Data were collected from the 13 Quebec Cancer Registry health institutions.

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Nonmalignant brain tumors are underreported by an estimated 60% in Canadian cancer registries. One explanation is that radiology facilities or their databases may not be adequately included in the cancer reporting infrastructure. A multidisciplinary stakeholder team met for 1 day, followed by teleconferences, to discuss the evidence for the importance of incorporating radiology diagnoses in brain tumor reports.

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This study was conducted to evaluate the genetic diversity of Blonde d'Aquitaine, a well-muscled native French beef breed, and to understand the relationships between Blonde d'Aquitaine, Limousin and Salers. We also compared these three beef breeds to the Holstein dairy breed. For this purpose, a set of 16 microsatellite markers were investigated.

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