Review
Multidisciplinary Sciences
Juan Chen, Huyue Zhou, Jingbin Huang, Rong Zhang, Xiancai Rao
Summary: This review explores the impact of sub-MICs of antibiotics on the virulence of Staphylococcus aureus, focusing on various aspects such as changes in cell morphology, virulence factor expression, bacterial adherence and invasion, biofilm formation, and small-colony variant production. Antibiotics at sub-MIC levels can alter bacterial virulence in S. aureus, leading to deformed cells, abnormal immune responses, and changes in disease development. The study also addresses the mechanisms underlying these antibiotic-induced alterations in virulence.
JOURNAL OF ADVANCED RESEARCH
(2021)
Article
Infectious Diseases
Chris A. Gentry, Darien L. Campbell, Riley J. Williams
Summary: This study aimed to investigate if moving away from metronidazole improved clinical outcomes of initial non-severe CDI episodes, but the conclusion showed that this change did not improve the composite of treatment failure or recurrence.
INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS
(2021)
Article
Microbiology
Ce Huang, Shengyu Feng, Fengjiao Huo, Hailiang Liu
Summary: Oral antibiotics have long-term negative effects on the intestinal microbiota, causing an imbalance in bacterial populations and increasing the risk of host disease.
MICROBIOLOGY SPECTRUM
(2022)
Article
Immunology
Nicholas A. Turner, Bobby G. Warren, Maria F. Gergen-Teague, Rachel M. Addison, Bechtler Addison, William A. Rutala, David J. Weber, Daniel J. Sexton, Deverick J. Anderson
Summary: Fidaxomicin and vancomycin are more effective in reducing C. difficile shedding and environmental contamination compared to metronidazole. Treatment choice may play a role in reducing healthcare-associated C. difficile transmission.
CLINICAL INFECTIOUS DISEASES
(2022)
Article
Infectious Diseases
Ronza Najjar-Debbiny, Alina Bazazhina, Naama Schwartz, Pninit Shaked, Walid Saliba, Gabriel Weber
Summary: There is no benefit of using vancomycin compared to metronidazole in terms of recurrence rate requiring hospitalization, in-hospital mortality, and mortality up to 4 and 8 weeks in non-severe first episode of CDI.
Article
Microbiology
Jinglong Liang, Teng Yi Huang, Yuzhu Mao, Xuejie Li
Summary: The biofilm formation of two genetically diverse Staphylococcus aureus isolates, 10379 and 121940, was evaluated under different concentrations of beta-lactam antibiotics. Despite their genetic differences, sub-inhibitory concentrations of beta-lactam antibiotics promoted biomass and biofilm viability of both isolates.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Public, Environmental & Occupational Health
Casey Morgan Luc, Danyel Olson, David B. Banach, Paula Clogher, James Hadler
Summary: The study aimed to assess the concordance of Connecticut medical providers with the 2017 CDI treatment update and its impact on recurrence risk. Findings showed an increase in concordance from 2018 to 2019, though it remained low in 2019. Recurrence risk was significantly associated with patients aged 65 and above, particularly those aged 75-84 years.
INFECTION CONTROL AND HOSPITAL EPIDEMIOLOGY
(2021)
Article
Multidisciplinary Sciences
Pablo Castro-Cordova, Maria Jose Mendoza-Leon, Daniel Paredes-Sabja
Summary: In elderly mice, the internalization of Clostridioides difficile spores in the ileum and colonic mucosa is higher compared to adults or young mice, while spore adherence to the ileum and colonic mucosa decreases with aging.
Article
Immunology
Amy S. Gargis, Maria Karlsson, Ashley L. Paulick, Karen F. Anderson, Michelle Adamczyk, Nicholas Vlachos, Alyssa G. Kent, Gillian A. McAllister, Susannah L. McKay, Alison L. Halpin, Valerie Albrecht, Davina Campbell, Lauren Korhonen, Christopher A. Elkins, J. Kamile Rasheed, Alice Y. Guh, L. Clifford McDonald, Joseph D. Lutgring
Summary: Reference susceptibility testing revealed that elevated minimum inhibitory concentrations (MICs) to vancomycin and metronidazole were rare among US Clostridioides difficile isolates. Ribotype 027 was associated with increased MICs to several antibiotics including fluoroquinolones and clindamycin.
CLINICAL INFECTIOUS DISEASES
(2023)
Article
Multidisciplinary Sciences
Bartlomiej Salamaga, Lingyuan Kong, Laia Pasquina-Lemonche, Lucia Lafage, Milena von und zur Muhlen, Josie F. Gibson, Danyil Grybchuk, Amy K. Tooke, Viralkumar Panchal, Elizabeth J. Culp, Elizabeth Tatham, Mary E. O'Kane, Thomas E. Catley, Stephen A. Renshaw, Gerard D. Wright, Pavel Plevka, Per A. Bullough, Aidong Han, Jamie K. Hobbs, Simon J. Foster
Summary: The study focused on the dynamic processes of peptidoglycan synthesis and hydrolysis in the bacterial cell wall, as well as the bactericidal effects of cell wall antibiotics. For Staphylococcus aureus, the independent regulation of cell wall synthesis and hydrolysis can lead to cell growth, death, or stasis.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Infectious Diseases
Sarah C. J. Jorgensen, Jackson J. Stewart, Bruce R. Dalton
Summary: The article discusses the skepticism surrounding the use of precision dosing and therapeutic drug monitoring in the rapidly advancing field of antimicrobials, questioning whether it can truly improve patient outcomes. It advocates for critical appraisal and maintaining a skeptical attitude, while emphasizing the need for compelling evidence before adopting new technologies.
JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY
(2021)
Article
Infectious Diseases
Yanlei Xu, Bingjie Wang, Huilin Zhao, Xinyi Wang, Lulin Rao, Wenxiu Ai, Jingyi Yu, Yinjuan Guo, Xiaocui Wu, Fangyou Yu, Shuying Chen
Summary: The study found that all MRSA isolates remained sensitive to vancomycin, teicoplanin, linezolid and daptomycin, but an increase in MIC50 and MIC90 was observed for linezolid.
INFECTION AND DRUG RESISTANCE
(2021)
Article
Microbiology
Daniel Laubitz, Katri Typpo, Monica Midura-Kiela, Clairessa Brown, Albert Barberan, Fayez K. Ghishan, Pawel R. Kiela
Summary: Antibiotics have improved survival from deadly infectious diseases but alter the gut microbiota composition, leading to diminished innate immunity and cognitive decline in older adults. In this study, age was found to be a factor associated with the differential recovery of gut microbiota after antibiotic treatment, with older mice experiencing slower and incomplete recovery compared to young mice.
Review
Infectious Diseases
Marcela Krutova, Mark Wilcox, Ed Kuijper
Summary: The recommendations for the treatment of Clostridioides difficile infection (CDI) have been updated recently. The drug of choice for CDI treatment should not only possess clinical efficacy, but also exhibit optimal antimicrobial stewardship by restoring the gut microbiota quickly to minimize the risk of infection relapses. Metronidazole, the current treatment option, has low concentration in stool and reduced antimicrobial bioactivity due to interactions with fecal microbiota. Elevated minimum inhibitory concentrations of metronidazole in epidemic C. difficile ribotypes and the emergence of resistance pose potential risks for treatment failure. Oral vancomycin and fidaxomicin, on the other hand, reach high concentrations in the stool and can effectively reduce C. difficile shedding. Facilities with higher CDI incidence and/or occurrence of epidemic ribotypes should avoid using metronidazole to prevent prolonged shedding and further transmission. Fidaxomicin, with its narrow spectrum of antimicrobial activity and persistence on spores, is the preferred option to reduce recurrent CDI rates.
INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES
(2022)
Article
Gastroenterology & Hepatology
Damjana Bogatic, Robert Bryant, Kate D. Lynch, Samuel P. Costello
Summary: Primary sclerosing cholangitis (PSC) is a progressive liver disease with poor prognosis and no effective therapies to prevent progression. This study evaluated potential medical therapies that may exert their effects in PSC by modulation of the gut-liver axis.
ALIMENTARY PHARMACOLOGY & THERAPEUTICS
(2023)