Two consecutive outbreaks caused by chlorhexidine mouthwash contaminated with Burkholderia contaminans in a two-hospital tertiary care system.

BACKGROUND: Hospital outbreaks caused by Burkholderia spp. have been linked to contamination of several medical solutions and products and are frequently associated with delayed detection and high mortality. AIM: To describe the management of two consecutive Burkholderia contaminans outbreaks caused by contaminated mouthwash of different brands during the COVID-19 pandemic. METHODS: This was a retrospective cohort study of all patients involved in two outbreaks caused by B. contaminans detected in 2021 and 2022. The investigation was initiated after a cluster of positive respiratory specimens, followed by retrospective and prospective case-finding. FINDINGS: A total of 69 patients were affected, 47 in 2021 and 22 in 2022. The majority of affected patients had positive respiratory specimens (85.5%); 55.1% of cases had COVID-19, and 72.5% had multidrug-resistant organisms. Almost all (97.1%) patients required ventilation and 42.0% died. Seventeen percent of cases in the first outbreak were deemed to have been acquired by patient-to-patient transmission, whereas all of the cases in the second outbreak were infected directly from using mouthwash. The experience gained from the first outbreak and the formation of a multidisciplinary Infection Control Rapid Response Team resulted in more rapid recognition and control of the second outbreak. Multivariate analysis showed that older age, intensive care unit admission, and COVID-19 infection were independent predictors of mortality. CONCLUSION: Burkholderia outbreaks at the time of COVID-19 were associated with high mortality. Rapid detection and response by a dedicated experienced team (as in the second outbreak) can reduce mortality and prevent superimposed cross-transmission between patients.

The Associations of C-Reactive Protein with Serum Levels of Polyunsaturated Fatty Acids and Trans Fatty Acids Among Middle-Aged Men from Three Populations.

BACKGROUND: C-reactive protein (CRP) and many fatty acids (FAs) have been linked to cardiovascular disease. Associations of serum CRP with FAs in different populations have not been established. METHODS: Participants were 926 men aged 40-49 (2002-2006) from a population-based sample; 310 Whites from Pennsylvania, U.S., 313 Japanese from Shiga, Japan, and 303 Japanese Americans from Hawaii, U.S. Serum CRP (mg/L) was measured using immunosorbent assay while serum FAs (%) were measured using capillary-gas-liquid chromatography. RESULTS: Whites had CRP (mg/L) levels higher than Japanese with Japanese Americans in-between (age-adjusted geometric mean "GM" 0.96, 0.38, 0.66, respectively). Whites had also higher levels of total n-6 FAs (%) and trans fatty acids (TFAs) but lower levels of marine-derived n-3 FAs compared to Japanese (41.78 vs. 35.05, 1.04 vs. 0.58, and 3.85 vs. 9.29, respectively). Japanese Americans had FAs levels in-between the other two populations. Whites had significant inverse trends between CRP and tertiles of total n-6 FAs (GM 1.20, 0.91 and 0.80; p=0.002) and marine-derived n-3 FAs (GM 1.22, 1.00 and 0.72; p<0.001) but a significant positive trend with TFAs (GM 0.80, 0.95 and 1.15; p=0.007). Japanese had a significant inverse trend between CRP and only total n-6 FAs (GM 0.50, 0.35 and 0.31; p<0.001). Japanese Americans had CRP associations with n-3 FAs, n-6 FAs, and TFAs similar to but weaker than Whites. CONCLUSIONS: With the exception of consistent inverse association of CRP with total n-6 FAs, there are considerable variations across the three populations in the associations of CRP with different FAs.

Ectopic cardiovascular fat in middle-aged men: effects of race/ethnicity, overall and central adiposity. The ERA JUMP study.

BACKGROUND/OBJECTIVES: Higher volumes of ectopic cardiovascular fat (ECF) are associated with greater risk of coronary heart disease (CHD). Identifying factors that are associated with ECF volumes may lead to new preventive efforts to reduce risk of CHD. Significant racial/ethnic differences exist for overall and central adiposity measures, which are known to be associated with ECF volumes. Whether racial/ethnic differences also exist for ECF volumes and their associations with these adiposity measures remain unclear. SUBJECTS/METHODS: Body mass index (BMI), computerized tomography-measured ECF volumes (epicardial, pericardial and their summation) and visceral adipose tissue (VAT) were examined in a community-based sample of 1199 middle-aged men (24.2% Caucasians, 7.0% African-Americans, 23.6% Japanese-Americans, 22.0% Japanese, 23.2% Koreans). RESULTS: Significant racial/ethnic differences existed in ECF volumes and their relationships with BMI and VAT. ECF volumes were the highest among Japanese-Americans and the lowest among African-Americans. The associations of BMI and VAT with ECF differed by racial/ethnic groups. Compared with Caucasians, for each 1-unit increase in BMI, African-Americans had lower, whereas Koreans had higher increases in ECF volumes (P-values<0.05 for both). Meanwhile, compared with Caucasians, for each 1-unit increase in log-transformed VAT, African-Americans, Japanese-Americans and Japanese had similar increases, whereas Koreans had a lower increase in ECF volumes (P-value<0.05). CONCLUSIONS: Racial/ethnic groups differed in their propensity to accumulate ECF at increasing level of overall and central adiposity. Future studies should evaluate whether reducing central adiposity or overall weight will decrease ECF volumes more in certain racial/ethnic groups. Evaluating these questions might help in designing race-specific prevention strategy of CHD risk associated with higher ECF.

Particle numbers of lipoprotein subclasses and arterial stiffness among middle-aged men from the ERA JUMP study.

We examined the association between serum lipoprotein subclasses and the three measures of arterial stiffness, that is, (i) carotid-femoral pulse wave velocity (cfPWV), which is a gold standard measure of central arterial stiffness, (ii) brachial-ankle PWV (baPWV), which is emerging as a combined measure of central and peripheral arterial stiffness and (iii) femoral-ankle PWV (faPWV), which is a measure of peripheral arterial stiffness. Among a population-based sample of 701 apparently healthy Caucasian, Japanese American and Korean men aged 40-49 years, concentrations of lipoprotein particles were assessed by nuclear magnetic resonance (NMR) spectroscopy, and the PWV was assessed with an automated waveform analyzer (VP2000, Omron, Japan). Multiple linear regressions were performed to analyse the association between each NMR lipoprotein subclasses and PWV measures, after adjusting for cardiovascular risk factors and other confounders. A cutoff of P<0.01 was used for determining significance. All PWV measures had significant correlations with total and small low-density lipoprotein particle number (LDL-P) (all P<0.0001) but not LDL cholesterol (LDL-C) (all P>0.1), independent of race and age. In multivariate regression analysis, no NMR lipoprotein subclass was significantly associated with cfPWV (all P>0.01). However, most NMR lipoprotein subclasses had significant associations with both baPWV and faPWV (P<0.01). In this study of healthy middle-aged men, as compared with cfPWV, both baPWV and faPWV had stronger associations with particle numbers of lipoprotein subclasses. Our results may suggest that both baPWV and faPWV are related to arterial stiffness and atherosclerosis, whereas cfPWV may represent arterial stiffness alone.

Is monopolar electrocautery safe and effective for control of the cystic artery during laparoscopic cholecystectomy?

BACKGROUND: Laparoscopic cholecystectomy is one of the most common surgical procedures. Here we report our experience with the use of monopolar electrocautery to control the cystic artery during laparoscopic cholecystectomy. SUBJECTS AND METHODS: Data regarding the site, number, size, and method of control of the cystic artery during laparoscopic cholecystectomy were prospectively collected. Other data collected included the operative time, intraoperative difficulties, and postoperative complications. RESULTS: The study included 158 laparoscopic cholecystectomies. Two arteries were controlled in 25 patients (15.8%) and one artery in 122 patients (77.2%), while the cystic artery was not identified in 11 patients (7%). The artery was graded as small, medium, and large in 43, 72, and 32 patients, respectively. Patients with unidentified cystic artery were excluded from our data analysis. The artery was controlled using monopolar electrocautery in 114 patients (77.5%) and by metal clips in 33 patients (22.5%). The cystic artery was controlled lateral to the cystic lymph node in the majority of patients (68%). Neither bleeding nor bile duct injury was encountered throughout the study period. CONCLUSIONS: Electrocautery is safe and effective for control of the cystic artery during laparoscopic cholecystectomy. A future randomized study is needed to confirm the findings of the present study.

Spinal versus general anesthesia for day-case laparoscopic cholecystectomy: a prospective randomized study.

BACKGROUND: The aim of this study was to compare the surgical outcome of day-case laparoscopic cholecystectomy (DCLC) performed with the patient under spinal anesthesia with that performed with the patients under general anesthesia in the management of symptomatic uncomplicated gallstone disease. PATIENTS AND METHODS: One hundred eighty patients were prospectively randomized to either the spinal anesthesia DCLC group (SA-DCLC group) or the general anesthesia DCLC group (GA-DCLC group). Intraoperative events related to spinal anesthesia, postoperative complications, and pain scores were recorded. The incidences of both overnight stay and readmissions were also recorded. Patient satisfaction values as to the anesthetic technique and same-day discharge were assessed by direct questionnaire at the end of the first postoperative week. RESULTS: In both groups, all procedures were completed laparoscopically. In the SA-DCLC group, there were 4 (4.4%) anesthetic conversions due to intolerable right shoulder pain, and those 4 patients were excluded from further analysis. In the SA-DCLC group, all patients were discharged on the same day. Overnight stay was required in 8 patients (8.9%) in the GA-DCLC group (P<.001). The cause of overnight stay was nausea and vomiting in 4 patients (4.4%), inadequate pain control in 3 patients (3.3%), and unexplained hypotension in 1 patient (1.1%). Readmission was required in 1 patient (1.1%) in the GA-DCLC group. The difference in patient satisfaction scores with regard to both anesthetic technique and same-day discharge was not statistically significant between the two groups studied. CONCLUSIONS: DCLC performed with the patient under spinal anesthesia is feasible and safe and is associated with less postoperative pain and lower incidence of postoperative nausea and vomiting and therefore a lower incidence of overnight stay compared with that performed with the patient under general anesthesia.

The epidemiology of the first described carbapenem-resistant Klebsiella pneumoniae outbreak in a tertiary care hospital in Saudi Arabia: how far do we go?

The purpose of this investigation was to describe the first documented carbapenem-resistant Klebsiella pneumoniae (CRKP) outbreak in a tertiary care facility in Saudi Arabia. We initiated a prospective study to follow all cases of CRKP as well as the active surveillance of patients in areas where cases were identified. We also conducted a retrospective review of the microbiology database for any missed cases of CRKP. Pulsed field gel electrophoresis (PFGE) was conducted for the available CRKP isolates. During March 2010, a cluster of eight CRKPs was detected primarily in the adult intensive care unit (ICU). Patients with CRKPs were put under strict contact isolation, along with appropriate infection control measures. A retrospective review of K. pneumoniae isolates over the previous 6 months revealed two more CRKPs. The PFGE results during the outbreak period showed that the majority of strains were genetically indistinguishable or closely related. The majority of patients had prolonged hospital stay (91%), indwelling devices (81%), surgical procedures (74%), carbapenem use (62%), and colonization/infection with other multiple drug-resistant organisms (MDROs) (57%). Two-fifths of patients with CRKP had clinical infection and 38% died during the current hospitalization. Contact isolation, hand hygiene, environmental cleaning, and staff education may control CRKP outbreak in the acute care setting, but did not prevent endemicity.

Significant inverse association of marine n-3 fatty acids with plasma fibrinogen levels in Japanese in Japan but not in whites or Japanese Americans.

BACKGROUND/OBJECTIVES: Numerous studies reported beneficial effects of marine n-3 fatty acids (n-3 FAs) on cardiovascular disease (CVD) and its risk factors. However, the association of marine n-3 FAs with plasma fibrinogen, a risk factor for CVD, remains uncertain. SUBJECTS/METHODS: In a population-based, cross-sectional study of 795 men aged 40-49 without CVD (262 whites in Allegheny County, Pennsylvania, USA, 302 Japanese in Kusatsu, Japan and 229 Japanese Americans in Honolulu, Hawaii, USA), we examined the association of marine n-3 FAs with plasma fibrinogen. Serum FAs were measured by capillary gas-liquid chromatography. Marine n-3 FAs were defined as the sum of docosahexaenoic, eicosapentaenoic and docosapentaenoic acids. Plasma fibrinogen was measured by an automated clot-rate assay. Multiple linear regression analyses were performed to assess the association. RESULTS: White, Japanese and Japanese-American men had mean marine n-3 FAs levels of 3.47%, 8.78% and 4.46%, respectively. Japanese men had a significant inverse association of marine n-3 FAs with fibrinogen (standardized regression coefficient of -0.11, P=0.049), after adjusting for age, body-mass index and current smoking. The significant inverse association remained after further adjusting for diabetes, C-reactive protein, triglycerides and other variables. White or Japanese-American men did not show a significant association. CONCLUSIONS: We observed the significant inverse association of marine n-3 FAs with fibrinogen in Japanese, but not in whites or Japanese Americans. The observation suggests that marine n-3 FAs at very high levels, as seen in the Japanese, may decrease plasma fibrinogen levels.

Laparoscopic cholecystectomy in cirrhotics: a prospective randomized study comparing the conventional diathermy and the harmonic scalpel for gallbladder dissection.

BACKGROUND: Ultrasonically activated devices have been used for gallbladder dissection in laparoscopic cholecystectomy (LC) with encouraging results. The aim of the present study was to compare the surgical outcome of LC performed by the harmonic shears to that performed by the conventional diathermy in patients with cirrhosis. METHODS: In this prospective randomized study, 40 cirrhotic Child-Pugh's classes A and B patients with symptomatic uncomplicated gallstones disease were randomly assigned to either the Harmonic scalpel LC group (20 patients) or the conventional diathermy LC group (20 patients). RESULTS: The use of the harmonic shears was associated with a statistically significant shorter median operative time (55 vs. 82.5 minutes, P = .000), less median estimated intraoperative blood loss (50 vs. 120 mL, P = .000), and lower incidence of gallbladder perforation (10% vs. 70%, P = .000). In the Harmonic scalpel LC group, Laparoscopic subtotal cholecystectomy was resorted to in eight patients (40%) compared with six patients (30%) in the conventional diathermy LC group. No statistically significant difference was found between both groups as regards the conversion rate, the median hospital stay, and the incidence of postoperative complications. Neither bile leaks nor Bile duct injuries were encountered in either group. Similarly, no mortalities were encountered in the present study. CONCLUSIONS: The Harmonic shears achieved complete hemobiliary stasis. Further, it provided a superior alternative to the conventional diathermy in terms of shorter operative time, less intraoperative blood loss, and lower incidence of gallbladder perforation partly through facilitating the performance of laparoscopic subtotal cholecystectomy.

Surgical site infection rates for herniorrhaphy and cholecystectomy in a tertiary care hospital in Saudi Arabia.

We carried out a surveillance study to calculate 2007 rates of surgical site infection (SSI) for herniorrhaphies and cholecystectomies performed at King Abdulaziz Medical City (KAMC) in Riyadh, to compare these rates to previous KAMC rates conducted in 1999-2001 and to benchmark these rates to those reported by American National Nosocomial Infections Surveillance (NNIS) hospitals in 2004. We reviewed the charts of patients who underwent herniorrhaphy (N=113) or cholecystectomy (N=208) from January to June 2007 using the Centers for Disease Control (CDC) criteria for SSI diagnosis. The rates were calculated and stratified by the modified risk index categories, based on American Society of Anesthesiology score, wound class, procedure duration and laparoscopy use. KAMC SSI rates per 100 operations in 2007 were 0.88 for herniorrhaphy and 0.48 for cholecystectomy. After adjusting to the different risk index categories between the KAMC and NNIS, standardized infection ratios (SIR) were comparable to NNIS at 97% for herniorrhaphy (p=0.553) and 90% for cholecystectomy (p>0.90). KAMC SSI rates per 100 operations in 1999-2001 were significantly higher than the NNIS rates at 4.34 for herniorrhaphy (p <0.001) and 1.87 for cholecystectomy (p=0.036). Compared to 1999-2001 rates, KAMC SSI rates in 2007 were reduced by 80% for herniorrhaphy (p=0.049) and 74% for cholecystectomy (p=0.270). The SSI rate improvement was observed after better enforcement of infection control practices.

Laparoscopic-assisted truncal vagotomy and gastro-jejunostomy: trial of simplification.

BACKGROUND: Truncal vagotomy and gastro-jejunostomy is an effective procedure for Gastric Outlet Obstruction. The authors' experience with the procedure is presented and an alternative technique for creating the gastro-jejunostomy is described. METHODS: From January 2005 through June 2007, 18 patients with gastric outlet obstruction secondary to a cicatrizing peptic duodenal ulcer underwent laparoscopic truncal vagotomy and an ante-colic laparoscopic-assisted stapled gastro-jejunostomy. RESULTS: All procedures were completed laparoscopically with a mean operative time of 81.2 +/- 11.1 minutes. Anastomotic leak was encountered in 1 (5.5%) patient and bile vomiting in 2 patients (11%). The mean follow-up duration was 22.8 +/- 9.8 months. None of the patients developed recurrent obstruction. CONCLUSIONS: The procedure is feasible, safe, and provides an effective cure for gastric outlet obstruction. The laparoscopic-assisted stapled gastro-jejunostomy reduces the operative time and may reduce the cost of the procedure.

Japanese men have larger areas of visceral adipose tissue than Caucasian men in the same levels of waist circumference in a population-based study.

Visceral adipose tissue (VAT) is an independent risk factor for metabolic and cardiovascular disorders. There has been no study that demonstrated different abdominal fat distribution between Asian and Caucasian men. As the Japanese are less obese but more susceptible to metabolic disorders than Caucasians, they may have larger VAT than Caucasians at similar levels of obesity. We compared the abdominal fat distribution of the Japanese (n=239) and Caucasian-American (n=177) men aged 40-49 years in groups stratified by waist circumference in a population-based sample. We obtained computed tomography images and determined areas of VAT and subcutaneous adipose tissue (SAT). We calculated VAT to SAT ratio (VSR). The Japanese men had a larger VAT and VSR in each stratum, despite substantially less obesity overall. In multiethnic studies, difference in abdominal fat distribution should be considered in exploring factors related to obesity.

Vascular events, mortality, and preventive therapy following ischemic stroke in the elderly.

BACKGROUND: The authors studied mortality, vascular events, and preventive therapies following ischemic stroke among adults aged > or =65 years. METHODS: The authors identified 546 subjects with first ischemic stroke during 1989 to 2001 among Cardiovascular Health Study participants. Deaths, recurrent strokes, and coronary heart disease (CHD) events were identified over 3.2 years (median) follow-up. RESULTS: During the first year of follow-up, rates were 105.4/1,000 for recurrent stroke and 59.3/1,000 for CHD. After the first year, the stroke rate was 52.0/1,000 and the CHD rate was 46.5/1,000. Cardioembolic strokes had the highest mortality (185.4/1,000) and recurrence rates (86.6/1,000). Lacunar strokes had the lowest mortality (119.3/1,000) and recurrence rates (43.0/1,000). Age and male sex predicted death and CHD, but not recurrence. Outcomes did not differ by race. Following stroke, 47.8% used aspirin and 13.5% used other antiplatelet agents; 52.6% of patients with atrial fibrillation used warfarin; 31.3% of hyperlipidemic subjects, 57.0% of diabetic patients, and 81.5% of hypertensive patients were drug-treated; and 40.0% of hypertensive patients had blood pressure (BP) <140/90 mm Hg. Older subjects were less likely to use lipid-lowering therapy, women were less likely to have BP <140/90 mm Hg, and low-income subjects were less likely to use diabetes medications. CONCLUSIONS: Recurrent strokes were nearly twice as frequent as coronary heart disease (CHD) events during the first year after initial stroke, but stroke and CHD rates were similar after the first year. Preventive drug therapies were underused, which may reflect clinical uncertainty due to the lack of clinical trials among the elderly. Utilization was lower among the oldest patients, women, and low-income individuals.