Clinical characteristics, prevalence, influence on sow performance, and assessment of sow-related risk factors for XXXX in sows.

@entity10516 @entity738 @entity1271
OBJECTIVE: To determine the prevalence and clinical appearance of @entity10516 in sows, to identify sow-related risk factors for development of @entity10516 , and to explore the manner in which the disease influences sow performance. ANIMALS: 1,254 sows from 76 herds. PROCEDURE: A clinical examination was performed at time of weaning and 7 days later. In addition, some sows were reexamined at time of weaning in the subsequent lactation. Data were collected on sow performance. RESULTS: At time of weaning, 205 of 1,254 (16%) sows had @entity10516 , and 7 days later, the prevalence was 19%. Variation between herds was large (0 to 50%). In most of the affected sows (156/205 176%]), only 1 mammary gland was affected. Parity, duration of lactation, and number of teat wounds were identified as risk factors for development of the disease. In 264 of 559 (47%) sows (38/104 [37%] mammary glands), a @entity738 recurred in the subsequent lactation. Risk for recurrence was related @entity738 appearing in multiple form but not to @entity738 size. Affected glands were less distended in the subsequent lactation, suggesting lower milk production. Litter size appeared to be negatively affected by the disease. CONCLUSIONS AND CLINICAL RELEVANCE: Granu lomatous @entity1271 is a common disease in sow herds maintained on straw bedding and in group housing, and it has negative effects on sow productivity. A thorough description of the clinical appearance of the disease and the identification of risk factors should contribute to development of relevant control measures.
