Journal of Clinical Studies & Medical Case Reports Category: Medical Type: Case Report

Neonatal Mastitis to MRSA

Tânia Mendo1*, Catarina Borges1, Joana Monteiro1, Gabriela Reis1 and Graça Seves1

1 Department of pediatrics, Hospital José Joaquim Fernandes, Unidade Local de Saúde do Baixo Alentejo, Beja, Portugal

*Corresponding Author(s):
Tânia Mendo
Department Of Pediatrics, Hospital José Joaquim Fernandes, Unidade Local De Saúde Do Baixo Alentejo, Beja, Portugal
Tel:+351 284310200,

Received Date: Oct 06, 2021
Accepted Date: Oct 08, 2021
Published Date: Oct 15, 2021


Neonatal mastitis is an inflammatory process of the mammary gland, presenting as erythema, edema, hypersensitivity, induration, sometimes with purulent exudate or abscess. It occurs more frequently in female infants, in the 3rd week of life and is usually unilateral. In most cases, the agent involved is Staphylococcus aureus and the clinical evolution is favorable.

Case Report

A 19-day-old newborn twin, with an uneventful early neonatal period and no relevant personal or family history, was observed in the emergency department for skin changes in the right breast. On observation, her breast skin was hyperemic, painful, with purulent exudate. Blood tests revealed 12940/uL leukocytes with 52.9% neutrophils and a CRP of 0.9mg/dL. She performed breast ultrasound which showed “a grossly ovoid hypoechogenic area, close to the surface of the skin” (Figures 1&2). She was admitted on intravenous flucloxacillin, which was replaced on day 3 by vancomycin, due to the isolation of SAMR in the exudate. She completed a 10-day-course of antibiotics. Blood cultures were negative. She was discharged on day 10, clinically improved, with almost complete regression of inflammatory signs and a residual echographic image. SAMR screening was performed on her parents and sister, which was negative [1-3].

 Figure 1: Neonate with mastitis. 

 Figure 2: Neonate with mastitis.


This case is similar to other ones described in literature. Nonetheless, the authors aim to highlight the importance of identifying methicillin-resistant Staphylococcus aureus. MR bacteria are a major health problem and its recent increase in pediatric age is concerning. Isolation of SAMR in a newborn without risk factors raises de possibility of a community/hospital outbreak. Therefore, proper infection control.

Author Disclosure

Drs Mendo, Borges, Monteiro, Reis and Seves have disclosed no financial relationships relevant to this article. This commentary does not contain a discussion of an unapproved/investigative use of a commercial product/device.


Citation: Mendo T, Borges C, Monteiro J, Reis G, Seves G (2021) Neonatal Mastitis to MRSA. J Clin Stud Med Case Rep 8: 0123.

Copyright: © 2021  Tânia Mendo, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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