Determination of reliable crystallization ages by
K-Ar methods for young (<1 Ma), fresh basalts from the
seafloor has been frustrated by several effects. The small
amounts of radiogenic ⁴⁰Ar developed over these timescales in
such low-K rocks are difficult to resolve from predominantly
atmospheric ⁴⁰Ar. An additional concern is that...
The objective of this study was to evaluate the presence
of methicillin-resistant Staphylococcus aureus and
coagulase-negative Staphylococcus spp. in bulk tank
milk samples from 288 organic and conventional dairy
farms located in New York, Wisconsin, and Oregon
from March 2009 to May 2011. Due to recent publications
reporting the presence...
The efficacy of DNA extraction protocols can be highly dependent upon both the type of sample being investigated and the types of downstream
analyses performed. Considering that the use of new bacterial community analysis techniques (e.g., microbiomics, metagenomics) is becoming
more prevalent in the agricultural and environmental sciences and many...
BACKGROUND: The objective of this study was to identify associations between the concentration of Mycobacterium avium subsp. paratuberculosis (MAP) antibodies in bulk milk and potential risk factors in herd management and herd characteristics, explaining high MAP antibody titers in milk. An extensive questionnaire was administered to 292 organic and conventional...
The recent multistate outbreak of
a multidrug-resistant (MDR) Salmonella Heidelberg
strain from commercial poultry production highlights
the need to better understand the reservoirs of these
zoonotic pathogens within the commercial poultry production
and processing environment. As part of a larger
study looking at temporal changes in microbial communities
within the...
