Browsing by Author "Swartz, Turner"
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- Aseptic Technique for Milk Sampling and Teat InfusionsSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-08)Discusses bovine mastitis and a technique for monitoring for the disease.
- Associations between preweaning calf feeding behaviors with age at first calving and lactational performance using an automatic calf feederSwartz, Turner; Petersson-Wolfe, Christina S. (American Dairy Science Association, 2022-12-14)The objective of this retrospective observational study was to determine whether preweaning calf behaviors and milk replacer (MR) intake from an automatic calf feeder were associated with age at first calving and first-lactation performance. Calves were housed in groups with access to an automatic calf feeder for 7 wk with a maximum milk allowance of 1,800 g/d of MR (12 L/d). Outcomes of interest included age at first calving (n = 137), first-lactation mature-equivalent 305-d (ME305) milk yield (n = 132), and first-lactation ME305 energy-corrected milk (ECM) yield (n = 132). Linear models included the fixed effects of the daily means of unrewarded visits, rewarded visits, drinking speed, and MR intake. Furthermore, breed, disease diagnosis, season of birth, and age of the calf when it was first introduced to the automatic calf feeder were included in all models. The genetic parameter for milk yield (predicted transmitting abil- ity for milk) was included in models related to lactational performance. Feeding behaviors and milk replacer intake were not associated with age at first calving. Unrewarded visits to the automatic calf feeder were associated with ME305 milk and ECM yields. As mean daily unrewarded visits increased by 1, first-lactation ME305 milk yield and ME305 ECM yield increased by 319 kg and 224 kg, respectively. No other feeding behavior was significantly associated with first-lactation ME305 milk or ECM yields. In conclusion, unrewarded visits were positively associated with first-lactation performance, but external validation is still needed.
- Bacillus spp.: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-11)Discusses some of the characteristics of Bacillus pathogens, and the methods for controlling and treating mastitis caused by these pathogens.
- Coagulase-Negative Staphylococci and Staphylococcus hyicus: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-11)Discusses some of the characteristics of CNS (Coagulase-negative staphylococci) and Staphylococcus hyicus, and ways to prevent and control mastitis caused by these pathogens.
- Corynebacterium bovis: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-11)Describes Corynebacterium bovis, a pathogen that can spread to the mammary glands of cattle, means of monitoring and use of post-milking disinfectants.
- Dairy Pipeline, April 2022Swartz, Turner; Petersson-Wolfe, Christina S.; Daubert, Jeremy (Virginia Cooperative Extension, 2022-04-30)The April 2022 issue includes the articles "Can mastitis during pregnancy affect the next generation?" by Turner Swartz and Christina Petersson-Wolfe, and "Biosecurity on your dairy farm -- Revisted" by Jeremy Daubert.
- Dairy Pipeline. July/August 2016Petersson-Wolfe, Christina S.; Swartz, Turner; Winston, David R. (Virginia Cooperative Extension, 2016-07-01)Articles in this issue provide information about housing calves in pairs, care and management of calves and heifers, and the importance of record keeping.
- Enterobacter spp.: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-12)Discusses Enterobacter, a pathogen that may on occasion cause bovine mastitis in dairy cattle. Also discusses methods for prevention and control of the disease.
- Mycoplasma spp.: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-12)Discusses characteristics of Cytoplasm pathogens, and methods for preventing and controlling mastitis caused by these pathogens.
- Pasteurella spp.: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-11)Discusses characteristics of Pasteurella, pathogens that occasionally cause bovine mastitis. Also notes some of the symptoms of Pasteurella infection, and difficulties in curing the cattle infected with this disease.
- Proteus spp.: A Practical Summary for Controlling MastitisPetersson-Wolfe, Christina S.; Swartz, Turner (Virginia Cooperative Extension, 2016-04-13)Provides information about Proteus bacteria which sometimes cause mastitis in cattle, including information about symptoms, prevention strategies and treatment. Notes that because this type of bacteria is difficult to treat with antibiotics, steps to prevent the disease from occurring is the best option.
- Prototheca spp.: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-05)Describes Prototheca species of algae, their life history and health effects on dairy cattle. Notes ways to prevent and control mastitis caused by these pathogens.
- Pseudomonas spp.: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-05)Describes Pseudomonas spp., their life history and health effects on dairy cattle. Notes ways to prevent and control mastitis caused by these pathogens.
- Trueperella pyogenes: A Practical Summary for Controlling MastitisSwartz, Turner; Petersson-Wolfe, Christina S. (Virginia Cooperative Extension, 2016-04-15)Discusses Trueperella pyogenes, a pathogen that may on occasion cause bovine mastitis in dairy cattle. Also discusses methods for prevention and control of the disease.
- Yeast and Molds: A Practical Summary for Controlling MastitisPetersson-Wolfe, Christina S.; Swartz, Turner (Virginia Cooperative Extension, 2016-04-15)Provides information about yeast and molds which sometimes cause mastitis in cattle, including information about symptoms, prevention strategies and treatment.