Objective—To compare characteristics and results of 2-step laparoscopy-guided abomasopexy versus omentopexy via laparotomy in the right paralumbar fossa for the treatment of dairy cows with a left displaced abomasum (LDA).
Design—Prospective clinical trial.
Animals—253 dairy cows with an LDA.
Procedures—All cows that were treated with omentopexy (n = 101) or 2-step laparoscopy-guided abomasopexy (152) from July 2005 through December 2006 were included. Presurgical, perisurgical, and postsurgical information was recorded by attending veterinarians. Producers were interviewed by telephone 7 and 60 days after surgery regarding the response of cows to surgery. Characteristics of and responses to the 2 surgical techniques were compared.
Results—At 7 days after surgery, the 2 groups of cows were not significantly different with respect to appetite, comfort, and milk yield; at 60 days after surgery, groups were similar with respect to milk yield, cull rates, and risk of relapse of LDA. Antimicrobial treatment in response to postsurgical pyrexia was necessary in only 20.4% (31/152) of cows that were treated with 2-step laparoscopy-guided abomasopexy. Mean duration (preparation and surgery) of 2-step laparoscopy-guided abomasopexy was significantly less than that of omentopexy (36 vs 74 minutes, respectively).
Conclusions and Clinical Relevance—Results of 2-step laparoscopy-guided abomasopexy and omentopexy via laparotomy in the right paralumbar fossa were not significantly different. Compared with omentopexy, laparoscopy-guided abomasopexy was performed more quickly and required postsurgical administration of antimicrobials less frequently. Although these factors may be of economic consequence to veterinarians and producers, other aspects must also be considered when choosing between techniques.
Objective—To compare results for 3 commercially available microbiological media plates with those for standard bacteriologic testing of bovine milk.
Sample—Milk samples from postpartum cows and cows with a high somatic cell count (SCC) or clinical mastitis (CM).
Procedures—Sample-ready Staphylococcus culture medium (SRSC) plates were used to detect Staphylococcus aureus in milk samples obtained from postpartum cows and cows with a high SCC or CM. Rapid coliform count (RCC) plates were used to detect coliforms in milk samples obtained from cows with CM. Aerobic count (AC) plates were used to detect streptococci in CM samples. Fresh mastitic milk samples were frozen and then thawed to evaluate the effects of freezing for the SRSC and RCC plates. The effects of dilution (1:10) of samples were determined. Agreement of results between the commercially available plates and standard bacteriologic testing was evaluated.
Results—The ability of SRSC plates to detect S aureus in milk samples was highest with diluted samples from postpartum cows and cows with a high SCC or CM. Sensitivity of the RCC plate for detection of coliforms was highest with diluted mastitic milk samples. The AC plates had a poor positive predictive value for detection of streptococci in mastitic milk samples. Freezing increased S aureus detection.
Conclusions and Clinical Relevance—Overall, the SRSC and RCC plates were accurate, were easy to use, and yielded results comparable to those of standard bacteriologic testing for the detection of S aureus and coliforms in bovine milk.
To describe the clinical and clinicopathologic characteristics, treatment, and outcome for cattle that developed a retroperitoneal abscess (RA) following paralumbar fossa laparotomy (PFL).
32 Holstein cows with RA.
The record database of a veterinary teaching hospital was searched to identify cattle that were treated for an RA between January 1995 and March 2017. Cattle with an RA > 30 cm in diameter located 3.5 cm subjacent to the skin that had undergone a PFL < 3 months before examination for the RA were evaluated. Information extracted from the record of each cow included signalment; physical examination, clinicopathologic, and transabdominal ultrasonographic findings; treatments administered; and outcome. Milk production data were analyzed for the lactations before, during, and after RA treatment.
Common physical examination findings were rumen hypomotility, anorexia, and fever, and common clinicopathologic findings were anemia and neutrophilia. Abdominal palpation per rectum and transabdominal ultrasonography facilitated RA diagnosis and identification of the optimal location for drainage. Thirty of 32 cows underwent surgical drainage of the RA and prolonged administration of systemic antimicrobials. Two cows were euthanized because of concurrent peritonitis, including 1 that underwent surgical RA drainage. Thirty cows were discharged from the hospital alive, and most returned to their previous level of milk production.
CONCLUSIONS AND CLINICAL RELEVANCE
Although uncommon, RA should be suspected in cows that develop anorexia and fever within 3 months after PFL. Cows with RA often returned to their previous level of milk production, but treatment was generally prolonged and costly.