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Background: In breast surgeries, a lactiferous duct leading to lactic glands of breast parenchyma allows direct contamination by normal bacterial flora of the nipple-areola complex. Complete blockage of nipple flora from the intraoperative field is almost impossible.
Objectives: We aimed to analyze the microbiological profile of nipple flora of breast cancer patients who underwent an implant-based immediate breast reconstruction after a total mastectomy, and to evaluate the association of nipple bacterial flora with postoperative complications.
Methods: A retrospective chart review was performed of patients who underwent an implant-based immediate breast reconstruction after a total mastectomy. A nipple swab culture was performed preoperatively. Patient demographics, surgical characteristics, and complications were compared between positive and negative nipple swab culture groups. Microbiological profile data including antibacterial resistance were collected.
Results: Among 128 breasts, 60 cases (46.9%) had positive preoperative nipple swab culture results. Staphylococcus epidermidis accounted for 41.4% of microorganisms isolated. A multivariate logistic regression analysis of postoperative complications revealed that the presence of nipple bacterial flora was a risk factor for capsular contracture. Seven cases of postoperative infection were analyzed. In 2 cases (40% of pathogen-proven infection), the causative pathogen matched the patient's nipple bacterial flora, which was methicillin-resistant S. epidermidis in both cases.
Conclusions: Nipple bacterial flora was associated with an increased risk of capsular contracture. Preoperative analysis of nipple bacterial flora can be an informative source for treating clinically diagnosed postoperative infections. More studies are needed to determine the effectiveness of active antibiotic decolonization of the nipple.
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http://dx.doi.org/10.1093/asj/sjae021 | DOI Listing |
Clin Exp Dent Res
October 2025
Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia.
Objectives: Oral health is an important aspect of quality of life for older people, especially those with dementia. The impact of an active oral hygiene program on the oral microbiome was explored in a group of older participants (average age 84 years old) with dementia against a separate control group whose oral hygiene followed the status quo.
Materials And Methods: The oral cavity bacteriomes and mycobiomes were assessed from swabs of cheek, gum, and tongue surfaces.
J Nutr
September 2025
Université Paris-Saclay, CEA, Centre National de Recherche en Génomique Humaine (CNRGH), 91057 Evry, France. Electronic address:
Background: Breast milk represents the optimal feeding strategy for newborns, supporting not only nutrition but also the establishment of a unique microbiota. The bacterial composition and diversity of this microbiota are shaped by various maternal and infant-related factors.
Objectives: This single-center prospective study aimed to examine the breast milk microbiota and determine the maternal and infant-related factors influencing its composition and diversity over the time.
Respir Investig
September 2025
First Department of Internal Medicine, Division of Infectious, Respiratory, and Digestive Medicine, University of the Ryukyus Graduate School of Medicine, 1076 Kiyuna, Ginowan, Okinawa, 901-2725, Japan.
Background: The clinical characteristics and risk factors for bacterial pneumonia co-infection in patients with coronavirus disease 2019 (COVID-19) since the epidemic of Omicron variants remain unclear.
Methods: This retrospective study included adult inpatients with COVID-19 at four tertiary hospitals in Okinawa, Japan, between May and July 2023. Bacterial pneumonia co-infection was diagnosed on the basis of new infiltrates on chest radiography, the presence of neutrophils on sputum Gram stain with a positive culture, and the requirement for antimicrobial therapy.
Cell Mol Life Sci
September 2025
Department of Rehabilitation Medicine, Zhongda Hospital, Southeast University, Nanjing, China.
Ulcerative colitis (UC) is a chronic inflammatory condition of the colon, closely linked to dysbiosis of gut microbiota and imbalances in bile acids. Lithocholic acid (LCA), a secondary bile acid, plays a crucial role in maintaining gut health; however, its specific therapeutic potential in UC remains to be fully elucidated. This study investigates the efficacy of LCA in alleviating UC and explores the underlying mechanisms, particularly focusing on the PXR/TLR4/NF-κB/NLRP3 signaling pathway and gut microbiota modulation.
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December 2025
Department of Otolaryngology-Head & Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.
An aberrant mucosal immune response against commensal bacteria in the tonsils is hypothesized to be one of the pathogenic mechanisms underlying immunoglobulin A nephropathy (IgAN). However, the bacteria involved in the pathogenesis of IgAN have not been fully elucidated. In this study, we compared the differences in tonsillar bacterial flora between IgAN ( = 101) and recurrent tonsillitis (RT) ( = 117) based on swab cultures from tonsillar surfaces and the center of the tonsils.
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