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Abstract: Improving Mycoplasma Hyopneumoniae Diagnostic Capabilities by Harnessing the Infection Dynamics

Abstract: Improving Mycoplasma hyopneumoniae diagnostic capabilities by harnessing the infection dynamics

Mycoplasma hyopneumoniae remains one of the most problematic bacterial pathogens for pig production. Despite an abundance of observational and laboratory testing capabilities for this organism, diagnostic interpretation of test results can be challenging and ambiguous. This is partly explained by the chronic nature of M. hyopneumoniae infection and its tropism for lower respiratory tract epithelium, which affects diagnostic sensitivities associated with sampling location and stage of infection. A thorough knowledge of the available tools for routine M. hyopneumoniae diagnostic testing, together with a detailed understanding of infection dynamics, are essential for optimizing sampling strategies and providing confidence in the diagnostic process. This study reviewed known information on sampling and diagnostic tools for M. hyopneumoniae and summarized literature reports of the dynamics of key infection outcomes, including clinical signs, lung lesions, pathogen detection, and humoral immune responses. The information gathethered in this manuscript can facilitate better understanding of the performance of different diagnostic approaches at various stages of infection with Mycoplasma hyopneumoniae.

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Special Considerations for Grazing Dairy Cows

Video: Special Considerations for Grazing Dairy Cows

Presented by Christine O'Reilly

Many Canadian grazing recommendations were developed using beef cattle in the prairies. While we have adapted these the forage species and climate in Ontario, other livestock have different needs. Maintaining milk components can be difficult on a predominantly pasture diet for lactating cows.

The purpose of the Profitable Pasture conference is to bring fresh ideas and new research results to Ontario grazing managers across the ruminant livestock sectors. These conferences have a major focus on pasture management.