Generalized Linear Models (2nd ed.)

Listeria monocytogenes is a Gram positive, aerobic, facultative anaerobic and nonacid fast bacterium, which can cause the disease listeriosis in both human and animals. It is widely distributed thoroughout the environment and has been isolated from various plant and animal food products associated with listeriosis outbreaks.

Contaminated ready-to-eat food products such as gravad and cold-smoked salmon and rainbow trout have been associated with human listeriosis in Sweden. The aim of this study was to analyse the occurrence and level of L. monocytogenes in
gravad and cold-smoked salmon (Salmo salar) products packed under vacuum or modified atmosphere from retail outlets in Sweden. Isolated strains were characterized by serotyping and the diversity of the strains within and between
producers were determined with PFGE (Pulsed-field gel electrophoresis). The characterized fish isolates were compared with previously characterized human strains.
L. monocytogenes was isolated from 11 (three manufacturers) of 56 products analysed. This included gravad salmon products from three manufacturers and cold-smoked salmon from one manufacturer. The highest level of L. monocytogenes found was 1500 cfu/g from a cold-smoked salmon product but the level was low (<100 cfu/g) in most of the products. Serovar 1/2a was predominant,
followed by 4b. Three products of gravad salmon harboured more than one serovar. PFGE typing of the 56 salmon isolates detected five Asc I types: four types were identical to human clinical strains with Asc I and one was identical and one was closely related to human clinical strains with Apa I. Isolation of identical or closely related L. monocytogenes strains from human clinical cases of listeriosis and gravad and cold-smoked salmon suggested that these kinds of products are possible sources of listeriosis in Sweden. Therefore, these products should be considered risk products for human listeriosis.

Listeria monocytogenes, a food-borne pathogen

Effects of climate changes on animal production and sustainability of livestock systems

Climate change and livestock: Impacts, adaptation, and mitigation

Heat stress impairs performance parameters, induces intestinal injury, and decreases macrophage activity in broiler chickens

Model of physiological stress in chickens 1. Response parameters.

2 Abstract: Genetic selection of broilers for rapid growth has resulted in greater final BW and improved feed conversion efficiency in reduced time increments. However, accelerated growth rates are associated with several undesirable traits, including increased fat deposition, and higher incidence of metabolic diseases, visual anomalies, skeletal deformities, and circulatory problems. These deficiencies, as well as th e associated financial losses, have led to increased interest in developing management techniques that will maximize productivity while minimizing associated problems of broilers. Light is an important parameter of poultry production. Currently, there are a wide variety of lighting programs (wavelength, intensity, and duration) and devices available to poultry producers, each possessing its own characteristics and applicability to rearing poultry. The potential for changing photoperiods to influence broiler productivity and health is receiving considerable investigation. Some lighting programs have a central purpose of slowin g the early growth rate of broilers thus allowing birds to achieve physiological maturity before maximal rates of muscle mass accretion. The aim of this review is to update research on lighting programs for broiler production and to give direction for future lighting research.

A Review of Lighting Programs for Broiler Production

Stocking density effects on growth performance and processing yields of heavy broilers

Stocking Density Effects on Male Broilers Grown to 1.8 Kilograms of Body Weight

Model of physiological stress in chickens 2. Dosimetry of adrenocorticotropin

J. P. Thaxton

Papers

Model of physiological stress in chickens 1. Response parameters.

A Review of Lighting Programs for Broiler Production

Stocking density effects on growth performance and processing yields of heavy broilers

Stocking Density Effects on Male Broilers Grown to 1.8 Kilograms of Body Weight

Model of physiological stress in chickens 2. Dosimetry of adrenocorticotropin