A one-year longitudinal study of enterohemorrhagic Escherichia coli O157 fecal shedding in a beef cattle herd.

Bovines are the primary reservoir of enterohemorrhagic Escherichia coli (EHEC) O157:H7 and the main source of its transmission to humans. Here, we present a one-year longitudinal study of fecal shedding of E. coli O157.

Impact of Organizational-level Factors on Cancer Screening Activities in Fire Departments: A Cross-sectional Study from the Sylvester Firefighter Cancer Initiative.

Despite known individual-level facilitators of cancer screening, the impact of work-related organizational-level characteristics on cancer screening is unknown particularly in the firefighter workforce who is experiencing a disproportionate burden of cancer. We examine the association between fire service organizational-level factors and implementation of cancer screening activities within Florida fire departments. We used a cross-sectional observational study design to survey fire department leaders attending the Florida Fire Chiefs' Association Health and Safety conference about cancer screening activities implemented by their fire departments.

Somatic embryogenesis in Asparagus officinalis L. cv. Argenteuil: interactions between genotype, explant type and growth regulators on callus induction, growth and embryogenic differentiation.

Callus induction, growth and embryogenic differentiation were studied in two selected genotypes of Asparagus officinalis L. cv. Argenteuil, to develop a protocol for somatic embryogenesis.

Effects of previous suppressive anthelmintic treatments on subsequent nematode infection in fattening cattle in Argentina.

The effect of previous suppressive anthelmintic treatments after weaning on parasitological parameters and weight gain of cattle was studied in the Pampeana region of Argentina. The study was carried out at two grazing fattening periods: April 1995/July 1996 and April 1997/July 1998. During both periods, 60 weaned calves that grazed contaminated pastures, were divided into three groups during the first part of the periods: GY1 group was treated every 2 weeks with doramectin while GY2 and GY3 groups remained untreated.