Faculty Bibliography

Infectious complications related to retained temporary epicardial pacing wires are rare. We report a case of a focal retroaortic abscess in association with retained pacing wires that became manifest 3 years after surgery for tricuspid valve endocarditis.

Obesity and rapid weight loss after bariatric surgery is associated with, the development of cholelithiasis and related complications. Several algorithms have been suggested in the management of the asymptomatic gallstones in patients presenting for weight loss surgery (WLS). Charts of patients presenting for laparoscopic Roux-en-Y (LRYGB) were retrospectively reviewed. Concomitant or delayed cholecystectomies were performed for symptomatic disease at the time of or after LRYGB, respectively. A total of 1376 patients underwent LRYGB and 21.0 per cent had a history of a cholecystectomy. An additional 2.7 per cent underwent cholecystectomy. The remaining 1050 "at-risk" patients were followed for a mean of 32.3 months and 4.9 per cent underwent delayed cholecystectomy for symptomatic disease. Of these patients, 88.5 per cent presented within 2 years of LRYGB. No significant morbidities were experienced by the "at-risk" cohort. Currently, there is no consensus in the treatment of asymptomatic cholelithiasis in patients presenting for WLS. A conservative regimen of reserving cholecystectomy for symptomatic disease is safe in patients undergoing LRYGB. Subsequent cholecystectomy was required in 4.9% with the majority of these patients presenting within 2 years of LRYGB. Further investigations in the form of randomized, prospective studies are necessary to clearly define the indications for cholecystectomy at the time of WLS.

We evaluated a tri-gas incubator for Campylobacter isolation to be used instead of an anaerobic jar. Fecal specimens were cultured in duplicate onto charcoal selective medium and incubated at 43 degrees C for 48 h in two different environments: a tri-gas incubator (Forma Scientific) adjusted to provide an atmosphere of 10% CO2, 10% O2, and the balance N2; and evacuated anaerobic jars with a replacement gas mixture of 10% CO2, 5% O2, and 85% N2. A total of 106 Campylobacter jejuni and 8 Campylobacter coli isolates were obtained from 2,348 stool specimens. Of the positive specimens, 113 isolates came from the incubator and 111 isolates came from the anaerobic jars. An additional 32 previously positive specimens were replated onto charcoal selective medium and retested by both methods. We recovered 27 C. jejuni isolates, 26 isolates by each method. The isolates from the incubator typically produced discrete colonies, while the isolates from the anaerobic jar showed some degree of swarming in colony formation. The tri-gas incubator provided a cost-effective method for culturing Campylobacter spp.