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Objective: This study aimed to determine and evaluate interventions that improve an antibiotic stewardship program (ASP) in reduction of the amount of antibiotic use and errors in drug utilization evaluation (DUE) form completion., Methods: A prospective quasi-experimental study was conducted to evaluate the effectiveness of the multifaceted interventions (preauthorization with computerized DUE, self-supervised checklists, and short active reminders of the antibiotic guidelines recommendations) incorporating an ASP among hospitalized internal medicine patients in a Thai tertiary care center. The preintervention period was from January to December 2018, and the postintervention period was from February 2019 to January 2020., Results: A total of 9188 and 9787 patient data were analyzed during the preintervention and postintervention periods, respectively. The overall median antibiotic use (defined daily dose/1000 bed-days) was significantly decreased in the postintervention period compared with the preintervention period (867.68 versus 732.33; P < 0.001). The reduction in antibiotic use was predominantly observed among broad-spectrum antibiotics, including cefoperazone/sulbactam (15.35 versus 9.75; P = 0.04), cefepime (13.09 versus 6.37; P = 0.003), ciprofloxacin (32.99 versus 17.83; P < 0.001), piperacillin/tazobactam (99.23 versus 91.93; P = 0.03), meropenem (2.01 versus 0.99; P < 0.001), imipenem/cilastatin (9.53 versus 4.59; P = 0.04), and colistin (74.70 versus 22.34; P < 0.0001). The overall rate of errors in DUE form completion was significantly decreased after the intervention (40% versus 28%; P < 0.001). The incidence of carbapenem-resistant Enterobacteriaceae infections/colonization was significantly lower in the postintervention period (0.27 versus 0.12/1000 bed-days; P = 0.02)., Conclusions: The study multifaceted interventions incorporating ASP were associated with significant reduction in the amount of broad-spectrum antibiotic use, DUE form completion errors, and incidence of carbapenem-resistant Enterobacteriaceae infection/colonization., Competing Interests: The authors disclose no conflict of interest., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)

Background: A risk categorization tool for healthcare workers (HCWs) exposed to COVID-19 is crucial for preventing COVID-19 transmission and requires validation and modification according to local context., Methods: From January to December 2021, a prospective cohort study was conducted among Thai HCWs to evaluate the performance of the specifically-created risk categorization tool, which classified HCWs into low-risk (LR), intermediate-risk (IR), and high-risk (HR) groups based on types of activities, duration of exposure, and protective methods used during exposure. Subsequent measures were determined for the HCWs based on the risk categories., Results: 1891 HCWs were included; 52%, 25% and 23% were LR, IR, and HR, respectively. COVID-19 was diagnosed in 1.3%, 5.1% and 27.3% of LR, IR and HR HCWs, respectively (P <0.001). Independent factors associated with COVID-19 were household or community exposure [adjusted odds ratio (aOR), 1588.68; P <0.001), being HR (aOR, 11.94; P <0.001), working at outpatient departments (aOR, 2.54; P <0.001), and no history of COVID-19 vaccination (aOR, 2.05; P = 0.01). The monthly rates of COVID-19 among LR, IR, and HR HCWs significantly decreased after the incremental rate of full vaccination. In-hospital transmission between HCWs occurred in 8% and was mainly due to eating at the same table., Conclusion: The study risk categorization tool can differentiate risks of COVID-19 among the HCWs. Prevention of COVID-19 should be focused on HCWs with the identified risk factors and behaviors associated with COVID-19 development and encouraging receipt of full vaccination., Competing Interests: Declaration of competing interest None declared., (Copyright © 2023. Published by Elsevier B.V.)

Background: We sought to determine the long-term impact of "bundled" infection control interventions on the rates of catheter-associated bloodstream infection (CA-BSI) in a middle-income country., Setting: A 500-bed tertiary care center in Thailand., Methods: A 3-year, hospital-wide, prospective quasi-experimental study was conducted for 1 year before the intervention (period 1), 1 year after implementation of the CA-BSI bundle (period 2), and at a 1-year follow-up after the intervention with intensified hand hygiene promotion (period 3)., Results: In period 1, 88 episodes of CA-BSI (14 cases per 1000 catheter-days) were recorded. During period 2, the CA-BSI rate decreased by 54.1 % (6.4 cases per 1000 catheter-days; P <.001). Compared with period 1 (8% adherence), hand hygiene adherence was improved in period 2 (24%; P <.001) and period 3 (54%; P <.001). The CA-BSI rate was further decreased by 78% (1.4 cases per 1000 catheter-days; P <.001) during period 3. Notably, no CA-BSIs were seen in 6 of the 12 months (50%) of period 3. Compared with period 1, the mean number of catheter-days was significantly reduced in period 2 (4.9 +/- 1.5 days; P <.001) and period 3 (4.1 +/- 1.1 days; P <.001)., Conclusion: Bundled infection control practices are feasible and effective in sustaining reduced incidence of CA-BSI in patients with central venous catheters in a resource-limited setting., (Copyright 2010 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Mosby, Inc. All rights reserved.)

Presence of a bacille Calmette-Guérin vaccination scar in medical students was an independent factor associated with initial tuberculin skin test reactions of 10-19 mm (P=.03) and booster effects of 6-9 mm (P=.02). These findings suggest that an initial tuberculin skin test reaction of at least 20 mm or a booster effect of at least 10 mm will reveal tuberculosis among students with prior bacille Calmette-Guérin vaccination.

In a cross-sectional study of Thai medical students, we compared the seroprevalence of antibody to measles virus, rubella virus, varicella zoster virus, hepatitis A virus, and hepatitis B virus with self-reports of prior infection or vaccination. Self-report predicted immunity to varicella zoster virus only. These data contribute to risk assessment and occupational health strategies in this resource-limited setting.

Background: We sought to determine the long-term effect of a multifaceted infection-control intervention to reduce the incidence of pandrug-resistant Acinetobacter baumannii infection in a Thai tertiary care center., Methods: A 3-year, prospective, controlled, quasi-experimental study was conducted in medical intensive care, surgical intensive care, and coronary care units for a 1-year period before intervention (period 1), a 1-year period after intervention (period 2), and a 1-year follow-up period (period 3). The interventions in period 2 included strictly implementing contact isolation precautions and appropriate hand hygiene, active surveillance, cohorting patients who were colonized or infected with pandrug-resistant A. baumannii, and environmental cleaning with 1:100 sodium hypochlorite solution. All interventions were continued in period 3, but environmental cleaning solutions were changed to detergent and phenolic agents., Results: Before the intervention, the rate of pandrug-resistant A. baumannii colonization and/or infection was 3.6 cases per 1000 patient-days. After the intervention, the rate of pandrug-resistant A. baumannii colonization and/or infection decreased by 66% in period 2 (to 1.2 cases per 1000 patient-days; P < .001) and by 76% in period 3 (to 0.85 cases per 1000 patient-days; P < .001). The monthly hospital antibiotic cost of treating pandrug-resistant A. baumannii colonization and/or infection and the hospitalization cost for each patient in the intervention units were also reduced by 36%-42% (P < .001) and 25%-36% (P < .001), respectively, during periods 2 and 3., Conclusions: A multifaceted intervention featuring active surveillance and environmental cleaning resulted in sustained reductions in the rate of pandrug-resistant A. baumannii colonization and infection, the cost of antibiotic therapy, and the cost of hospitalization among intensive care unit patients in a developing country.

We performed a study with a 1:3 ratio of case patients (n = 11) to control patients (n = 33) to evaluate risk factors for postoperative endophthalmitis in a Thai tertiary care center. Multivariate analysis revealed that diabetes mellitus and surgeon A were associated risk factors. Preoperative diabetes mellitus control and the improvement of infection control practices led to the termination of the outbreak.

Objectives: To evaluate the epidemiology and outcomes for initiation of inappropriate urinary catheterization (IUC) among hospitalized patients., Setting: A 450-bed, tertiary-care hospital., Patients: All patients admitted to the hospital from September 1, 2003 to June 12, 2004 with urinary catheter (UC). An independent observer reviewed the patient's chart, interviewed the patient and nursing staff, and assessed the need for the UC daily until the catheter was removed or the patient was discharged., Results: One hundred thirty-one (15%) of 895 patients had initiation of IUC. The median age was 61 (range, 15-92). Medicine (0.52 catheter utilization ratio), surgery (0.24 catheter utilization ratio) and the ICUs (0.32) had the most UC use. Main reasons for initial IUC included no clear indication (28%), inappropriate urine output monitoring (26%), and urinary incontinence (18%). Admission to the medical ICU (adjusted odds ratio [aOR]=2.3; P<0.001), nonambulatory functional status (aOR=2.1; P<0.001), and female sex (aOR=1.9; P=0.001) were independently associated with IUC. Catheter-associated urinary tract infections (CA-UTI) occurred in 129 patients (14%). Patients with IUC had a longer duration of catheterization (12 vs. 3 days; P<0.01) were more likely to develop CA-UTI (82% vs. 8%; P=0.001) and had prolonged hospital length of stay (median, 15 vs. 5 days; P<0.001). The mean monthly cost of antibiotics for treatment of CA-UTI was $3480 (range, $1874-$5584)., Conclusion: UC were inappropriately used more commonly among female, nonambulatory, and medical ICU patients. Careful attention to this aspect of medical care may reduce the incidence CA-UTI with subsequent decreases in length of stay, cost of hospitalization, and cost for treatment of CA-UTI.

Objective: To evaluate the efficacy of a multifaceted hospitalwide quality improvement program that featured an intervention to remind physicians to remove unnecessary urinary catheters., Methods: A hospitalwide preintervention-postintervention study was conducted over 2 years (July 1, 2004, through June 30, 2006). The intervention consisted of nurse-generated daily reminders that were used by an intervention team to remind physicians to remove unnecessary urinary catheters, beginning 3 days after insertion. Clinical, microbiological, pharmaceutical, and cost data were collected., Results: A total of 2,412 patients were enrolled in the study. No differences were found in the demographic and/or clinical characteristics of patients between the preintervention and postintervention periods. After the intervention, reductions were found in the rate of inappropriate urinary catheterization (mean rate, preintervention vs postintervention, 20.4% vs 11% [P=.04]), the rate of catheter-associated urinary tract infection (CA-UTI) (mean rate, 21.5 vs 5.2 infections per 1,000 catheter-days [P<.001]), the duration of urinary catheterization (mean, 11 vs 3 days [P<.001]), and the total length of hospitalization (mean, 16 vs 5 days [P<.001]). A linear relationship was seen between the monthly average duration of catheterization and the rate of CA-UTI (r=0.89; P<.001). The intervention had the greatest impact on the rate of CA-UTI in the intensive care units (mean rate, preintervention vs postintervention, 23.4 vs 3.5 infections per 1,000 catheter-days [P=.01]). The monthly hospital costs for antibiotics to treat CA-UTI were reduced by 63% (mean, $3,739 vs $1,378 [P<.001]), and the hospitalization cost for each patient during the intervention was reduced by 58% (mean, $366 vs $154 [P<.001])., Conclusions: This study suggests that a multifaceted intervention to remind physicians to remove unnecessary urinary catheters can significantly reduced the duration of urinary catheterization and the CA-UTI rate in a hospital in a developing country.

We describe a pseudo-outbreak of Acinetobacter lwoffii infection that was recognized early. The pseudo-outbreak involved 16 patients and occurred 3.5 months after the GNS-506 Vitek automated system was introduced in the microbiology laboratory. Prompt confirmation of incomplete use of the automated system's algorithm as the point source of the misidentified A. lwoffii clinical isolates averted a full outbreak investigation and excess use of infection control resources.

Objective: To evaluate the correlation between self-report of a prior history of chickenpox and results of varicella-zoster virus (VZV) immunoglobulin (Ig) G serologic test results in an outbreak of VZV infection among Thai healthcare workers (HCWs) and to conduct a cost-benefit analysis of establishing routine VZV immunization as part of an occupational health program on the basis of the outbreak data., Methods: All exposed patients received prophylaxis and the HCWs in our 3 intensive care units (ICUs) were prospectively evaluated. HCWs were assessed for disease history and serologic evidence of VZV IgG. A cost-benefit analysis was performed., Results: After 140 HCWs and 18 ICU patients were exposed to VZV, 10 HCWs (7%) with active VZV infection were relieved from work until skin lesions were crusted. Acyclovir (ACV) was prescribed to all 10 HCWs with active disease, and all 18 exposed patients received prophylaxis with ACV. Of 140 HCWs, 100 consented to longitudinal follow-up. Twenty-three (100%) of the HCWs who reported a history of chickenpox also had serologic test results that were positive for VZV IgG, compared with 30 (39%) of 77 HCWs who reported no prior history of chickenpox, yet had test results that were positive for VZV IgG. Reported history of chickenpox had a sensitivity of 43%, a specificity of 100%, a positive predictive value of 100%, and a negative predictive value of 61% with respect to VZV infection immunity. The total cost estimate for this outbreak investigation was $23,087., Conclusions: An HCW's reported history of chickenpox was a reliable predictor of immunity; a report of no prior history of chickenpox was unreliable. Our cost-benefit analysis suggests that the costs of an occupational health program that included VZV surveillance and immunization for the next 323 HCWs would be approximately equal to the excess costs of $17,227 for the ACV therapy, HCW furloughs, and staff overtime associated with this outbreak.

We report the first case of avian influenza in a patient with fever and diarrhea but no respiratory symptoms. Avian influenza should be included in the differential diagnosis for patients with predominantly gastrointestinal symptoms, particularly if they have a history of exposure to poultry.