The Economics and Productivity of Organic versus Conventional U.S. Dairy Farms

Management of mastitis on organic and conventional dairy farms.

This paper compares management of mastitis on organic dairy farms with that on conventional dairy farms. National standards for organic production vary by country. In the United States, usage of antimicrobials to treat dairy cattle results in permanent loss of organic status of the animal, effectively limiting treatment choices for animals experiencing bacterial diseases. There are no products ...

Management of mastitis on organic & conventional dairy farms

Pathogen Identification And Incidence Rates Of Clinical Mastitis On Organic And Conventional Dairy Farms

PATHOGEN IDENTIFICATION AND INCIDENCE RATES OF CLINICAL MASTITIS ON ORGANIC AND CONVENTIONAL DAIRY FARMS Léna Levison Advisor: University of Guelph, 2013 Dr. Trevor DeVries Thesis objectives were: 1) evaluate incidence rate of producer reported clinical mastitis (IRCM) and predominant pathogen types on conventional and organic dairies; 2) investigate associations between farm type, housing and ...

Treatment practices and quantification of antimicrobial drug usage in conventional and organic dairy farms in Wisconsin.

The objective of this study was to develop a method to quantify antimicrobial drug usage and treatment practices on conventional and organic dairy farms that had been recruited to represent a broad spectrum of potential exposure to antimicrobial drugs. Data on disease prevalence and treatment practices of organic (n = 20) and conventional (n = 20) farms were obtained during a farm visit using a...

Association between bovine-leukosis virus seroprevalence and herd-level productivity on US dairy farms.

Bovine-leukosis virus (BLV; also termed 'bovine-leukemia virus') is a retrovirus that primarily affects lymphoid tissue of dairy and beef cattle. Our objective was to investigate the association between BLV infection and annual value of production (AVP) on dairy herds within the United States, as part of the USDA National Animal Health Monitoring System's 1996 dairy study. 1006 herds (in 20 sta...