Twenty five year old lactating woman presented with fever, acute breast pain and swelling. Which one of the following organisms cause this acute breast problem?

1. A

   Streptococcus

2. B

   Staphylococcus

3. C

   Enterococcus

4. D

   Pneumococcus

Appeared in: JIPMER Nursing Officer-2017

Explanation

• The patient's symptoms of fever, acute breast pain, and swelling during lactation are the classic presentation of acute mastitis.
• Staphylococcus aureus is the most common causative organism for puerperal (lactational) mastitis, accounting for a significant percentage of cases.
• The mode of infection is typically through nipple fissures or abrasions, where bacteria from the infant's nasopharynx are introduced into the milk ducts.

Why Other Options Were Wrong

• Option A: While Streptococcus species can cause various postpartum infections like endometritis or puerperal sepsis, they are a much less frequent cause of mastitis compared to Staphylococcus.
• Option C: Enterococcus is primarily associated with infections of the urinary tract, abdomen, or endocardium and is not a common pathogen in mastitis.
• Option D: Pneumococcus (Streptococcus pneumoniae) is a major cause of respiratory infections (pneumonia), meningitis, and sinusitis; it is not associated with breast infections.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of Lactational Mastitis as background academic context rather than a clinical decision trigger.
• Prompt identification and treatment of lactational mastitis are crucial to prevent complications like breast abscess formation, which occurs in approximately 10% of cases and may require surgical drainage or needle aspiration.
• A key nursing role is educating the mother on preventive measures, especially proper infant latching techniques to avoid nipple trauma, and the importance of continuing to breastfeed or pump from the affected breast to ensure complete emptying and prevent milk stasis.
• What if the infection does not resolve with initial antibiotics? This could suggest a resistant strain like MRSA or the development of a breast abscess. This would necessitate a change in antibiotics (e.g., to vancomycin or clindamycin) and a breast ultrasound to check for an abscess, which would require drainage.

How to Approach the Question

• First, analyze the patient's profile: a 'twenty-five-year-old lactating woman'. This context is critical and points towards postpartum or lactation-related complications.
• Next, identify the cluster of clinical signs: 'fever, acute breast pain and swelling'. This triad is the classic presentation of acute mastitis.
• Frame the core question: The task is to identify the most common causative organism for this specific condition (acute lactational mastitis).
• Access your microbiology knowledge regarding common pathogens in postpartum and skin/soft tissue infections.
• Evaluate the options. While all are pathogenic bacteria, recall that Staphylococcus aureus is the most frequent cause of infections entering through breaks in the skin, such as nipple fissures that can occur during breastfeeding.
• Select the most probable pathogen based on established epidemiological data for lactational mastitis.

Concept Tested & Keywords

• Concept Tested: Etiology of Lactational Mastitis
• Stem keywords: lactating woman, fever, acute breast pain, swelling
• Lead-in keywords: Which one
• Clinical cues: The combination of lactation and symptoms of localized infection (pain, swelling, fever) points directly to mastitis.
• Negative lead-in flag: false

Question ID

QPkDBCRRjF66h3e_YfAfOV

Copy ID

Reference Book

E6 Obstetrics Williams p. 68-92

E6 Microbiology Essentials Sastry 4e Part 2 p. 78-80