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Pulsed-field gel electrophoresis (PFGE) has historically been considered the gold standard in fingerprinting bacterial strains in epidemiological studies and outbreak investigations; little is known regarding its use in individual clinical cases. The current study detailed two clinical cases in which PFGE helped to determine the source of their methicillin-resistant (MRSA) bacteremia. Patient A was found to have MRSA bacteremia after trauma in her pelvic area. MRSA was also found in her groin but not in her nostril and rectum. PFGE was performed that showed variable bands of her MRSA isolates from blood and groin, suggestive of different strains of MRSA. Her MRSA bacteremia was determined to be unrelated to her pelvic trauma. Patient B was found to have MRSA bacteremia after colonoscopy. MRSA was also found in his nostril and rectum. PFGE was performed that showed variable bands of his MRSA isolates from blood and rectum but identical bands of MRSA isolates from his blood and nostril. His MRSA bacteremia was determined to be unrelated to his colonoscopy procedure. The current study demonstrates the use of PFGE to rule out the source of bacteremia in individual clinical cases.
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http://dx.doi.org/10.3390/idr13030056 | DOI Listing |
Laryngoscope
September 2025
Department of Otolaryngology-Head and Neck Surgery, New York-Presbyterian/Weill Cornell Medical Center, New York, New York, USA.
We report the case of a 3-month-old infant with methicillin-resistant Staphylococcus aureus (MRSA) necrotizing fasciitis of the neck and chest complicated by bacteremia, pneumonia, and mediastinitis, which required multiple surgical debridements, including median sternotomy. The case is unsual given the patient's age and causative pathogen, and underscores the importance of early diagnosis, timely surgical intervention, and multidisciplinary collaboration to ensure survival.
View Article and Find Full Text PDFmBio
September 2025
The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, California, USA.
Unlabelled: Methicillin-resistant (MRSA) is a leading cause of endovascular infections, where interactions with endothelial cells play a critical role in pathogenesis. Gp05, a prophage-encoded protein, has previously been implicated in promoting antibiotic persistence by modulating MRSA cellular physiology and evading neutrophil-mediated killing. In this study, we investigated the role of Gp05 in MRSA-endothelial cell interactions, focusing on its impact on bacterial adhesion, invasion, cytotoxicity, and the host inflammatory response.
View Article and Find Full Text PDFCureus
August 2025
Medical Mycology Research Center, Chiba University, Chiba, JPN.
species are known to cause disseminated infections in immunocompromised hosts, typically in patients with hematological malignancies undergoing chemotherapy and those with a history of antifungal use. This case report described a non-neutropenic 85-year-old male patient with fungemia following polymicrobial bacteremia. He presented with fever and disturbed consciousness and was admitted for sepsis (day 1).
View Article and Find Full Text PDFJ Antimicrob Chemother
August 2025
Department of Medical Microbiology and Infectious Diseases, Max Rady College of Medicine, University of Manitoba, Room 543-745 Bannatyne Avenue, Winnipeg, Manitoba R3E 0J9, Canada.
Objectives: Bloodstream infections are associated with significant morbidity and mortality. The purpose of this study was to determine the most common pathogens causing bacteraemia among Canadian patients and to evaluate their antimicrobial susceptibility profiles.
Methods: Annually from 2007 to 2023, bloodstream isolates from patients admitted to or evaluated at Canadian hospitals were collected by sentinel laboratories (CANWARD surveillance study).
Infect Drug Resist
August 2025
Division of Infectious Diseases and Tropical Medicine, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical University, Taipei, Taiwan.
Paraspinal steroid injections, while widely employed for the treatment of back pain, carry risks of serious complications including infection. We describe a 54-year-old immunocompetent woman who developed a disseminated methicillin-resistant (MRSA) infection following a lumbar paraspinal steroid injection for back pain. She presented with fever, dyspnea, and acute low back pain, progressing to hypoxic respiratory failure requiring intubation.
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