Search

Tzu-Hao Liu,1,2 Hsiao-Ping Wang,1,3 Fu-Nang Cho,3,4 Jiun-Ling Wang,5,6 Chih-Hsin Hung,7 Yee-Hsuan Chiou,1,3 Yao-Shen Chen,3,8 Susan Shin-Jung Lee,3,8 Ming-Fang Cheng1,3,7,91Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan; 2Department of Pediatrics, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung 81342, Taiwan; 3School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan; 4Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan; 5Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; 6Department of Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; 7Department of Chemical Engineering and Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung 84001, Taiwan; 8Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan; 9School of Nursing, Fooyin University, Kaohsiung 83102, TaiwanCorrespondence: Ming-Fang ChengDepartment of Pediatrics, No. 386, Dazhong 1st Road, Zuoying District, Kaohsiung 813, TaiwanTel +886-7342-2121Fax +886-7346-8207Email mfcheng@vghks.gov.twPurpose: The role of pathogenic Escherichia coli colonization in asymptomatic pregnant women is not well understood. The purpose of this work was to determine the prevalence, antimicrobial susceptibility, and neonatal outcomes of pathogenic E. coli colonization in pregnant women.Patients and methods: A total of 137 women from southern Taiwan with singleton pregnancies were enrolled between March 2016 and June 2017. The women were prospectively screened for E. coli colonization in the rectovaginal region during prenatal examination. The exclusion criteria are twin pregnancy of the mother and major anomaly of the neonate. All E. coli isolates were identified as either pathogenic or commensal strains, and their susceptibility to various antimicrobials was investigated. Clinical data of the infants were retrieved from their medical records.Results: Results showed that 35.8% of asymptomatic pregnant women had pathogenic E. coli colonization in the rectovaginal region. Neonates born to such mothers showed significant morbidities, including hospitalization (OR= 3.74, 95% CI= 1.18∼11.87), hyperbilirubinemia (OR= 2.81, 95% CI= 1.24∼6.38), and gastrointestinal symptoms (OR= 5.53, 95% CI= 1.39∼21.94). Maternal colonization with pathogenic E. coli at rectoanal site was a risk factor for neonatal hyperbilirubinemia after Benjamini–Hochberg (BH) adjustment (52% vs 24%, adjusted P= 0.048).Conclusion: The prevalence of pathogenic E. coli colonization in Taiwanese asymptomatic pregnant women was high, and the neonates born to colonized mothers exhibited potential neonatal morbidities. Larger studies are necessary to confirm these findings.Keywords: maternal-neonatal transmission, respiratory distress, hyperbilirubinemia, gastrointestinal symptoms

Pin-Chieh Wu,1,2,* Jiun-Ling Wang,3,4,* Po-Ren Hsueh,5 Po-Hsiang Lin,6 Ming-Fang Cheng,7–10 I-Fei Huang,7 Yao-Shen Chen,8,11 Susan Shin-Jung Lee,8,11 Mar Guang-Yuan,1,11 Hsien-Chung Yu,1,8,11–12 Chiao-Lin Hsu,1,2 Fu-Wei Wang,2,13 Chi-Shen Chen,1 Chih-Hsin Hung,9 Wen-Chien Ko3,41Department of Physical Examination Center, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; 2Department of Nursing, Meiho University, Pingtung, Taiwan; 3Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; 4Department of Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan; 5Departments of Laboratory Medicine and Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; 6Department of Emergency Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; 7Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; 8School of Medicine, National Yang-Ming University, Taipei, Taiwan; 9Department of Chemical Engineering and Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan; 10Department of Nursing, Fooyin University, Kaohsiung, Taiwan; 11Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; 12Institute of Health Care Management, Department of Business Management, National Sun Yat-sen University, Kaohsiung, Taiwan; 13Department of Family Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan*These authors contributed equally to this workPurpose: Fecal carriage of extended-spectrum β-lactamase-producing Escherichia coli (ESBL-EC) is common in Asia, especially in China and Southeast Asia. There are no data about fecal carriage of ESBL-EC and mcr-1-positive E. coli in Taiwan, and few studies focusing on the risk factors of asymptomatic fecal carriage of epidemic ST131 E. coli have been published.Patients and methods: From healthy inhabitants attending health examinations at a medical center in southern Taiwan in 2017, we collected 724 stool samples, which were examined for ESBL-EC fecal carriage using chromogenic medium. ST131 and mcr1-positive E. coli were also investigated using multiplex PCR. Clinical data from all participating adults were collected to analyze the risk factors for fecal ESBL-EC or ST131 E. coli carriage.Results: The prevalence rate of asymptomatic ESBL-EC fecal carriage in adults was 1.9% (14/724). ST131 was found in 22 (3.0%) adults and mcr-1-positive E. coli was found in three (0.4%) adults. A multivariate analysis showed that the risk factors associated with ESBL-EC carriage were diabetes mellitus (adjusted odds ratio [aOR]: 5.5, 95% confidence interval [CI]: 1.3–22.7), a history of colonic polyps (aOR: 6.4, 95% CI: 1.6–24.9), and chronic renal insufficiency (aOR: 20.7, 95% CI: 1.4–305.7). Underlying cancer (aOR: 4.8, 95% CI: 1.0–22.5) and stroke (aOR: 18.0, 95% CI: 1.6–207.5) were associated with ST131 E. coli fecal carriage. In our cohort, travel to Asian countries and food habit were not associated with ST131 or ESBL-EC fecal carriage.Conclusions: The ESBL-EC or ST131 E. coli fecal carriage rate is low among asymptomatic adults in Taiwan. Certain underlying medical conditions were associated with their fecal carriage.Keywords: fecal colonization, extended-spectrum β-lactamase, sequence type, MCR1, Escherichia coli

Jiun-Ling Wang,1,* Chih-Feng Kuo,2,* Che-Ming Yeh,3 Jung-Ren Chen,4 Ming-Fang Cheng,5–7 Chih-Hsin Hung3 1Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC; 2Department of Nursing, I-Shou University, Kaohsiung, Taiwan, ROC; 3Department of Chemical Engineering and Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan, ROC; 4Department of Biological Science and Technology, I-Shou University, Kaohsiung, Taiwan, ROC; 5Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, ROC; 6School of Medicine, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC; 7Department of Nursing, Fooyin University, Kaohsiung, Taiwan, ROC *These authors contributed equally to this work Purpose: Few effective antibiotics are available for treating extensively drug-resistant Acinetobacter baumannii (XDRAB) sepsis. Phage therapy may show potential in treating XDRAB infections. Materials and methods: We studied ϕkm18p phage therapy in BALB/c and C57BL/6 mice models of XDRAB bacteremia. Results: We observed survival rates of nearly 100% in groups given phage therapy concurrent with XDRAB at different multiplicities of infection. In mice that received phage therapy after a 1-hour delay, the survival rate decreased to about 50%. The bacterial load in the blood decreased from 108 to 102 and 103 colony-forming units (CFU)/mL in the concurrent treatment group. In the phage therapy group, the levels of the cytokines, such as tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6), were low at 3 hours after infection. Although some phage-resistant mutants were isolated after phage therapy, a cytotoxicity study showed that they had reduced fitness. Conclusion: Phage therapy in XDRAB bacteremia increased the animal survival rates, decreased the bacteremia loads, and decreased the levels of inflammatory markers TNF-α and IL-6. However, the reduced therapeutic effect with delayed administrations may be a concern in developing a successful phage therapy for treating acute infections of multidrug-resistant pathogens. Keywords: Acinetobacter baumannii, survival rates, bacteria, multiple antimicrobial drug resistance, phage therapy