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Breast abscess due to Salmonella Typhimurium in a patient with rheumatoid arthritis: a case report

BMC Infectious DiseasesBMC series – open, inclusive and trusted201616:348

https://doi.org/10.1186/s12879-016-1659-z

Received: 4 April 2016

Accepted: 28 June 2016

Published: 22 July 2016

Abstract

Background

This is the first report of breast abscess due to Salmonella enterica serotype Typhimurium. Staphylococcus aureus is known as the most common cause of breast abscess. Salmonella spp. may occasionally form localized abscesses after dissemination to various organ systems following a bacteraemia. But breast abscess related to Salmonella spp is a very rare complication.

Case presentation

A 43-year-old female patient referred to our hospital with a lump, fever and mild pain in her breast. The patient was not pregnant or lactating at that time. She had a history of rheumatoid arthritis for 5 years and was under immunosuppressive therapy. Ultrasonography of the breast revealed an abscess. The abscess was drained and sent for culture to medical microbiology laboratory. The microorganism was identified as Salmonella enterica serotype Typhimurium and found to be sensitive to all antibiotics tested. The patient was cured after surgical debridement and antibiotic therapy. The abscess did not recur again.

Conclusions

This case is presented to draw attention to non-typhoidal Salmonella as rare causes of breast abscess and submission of specimens to the microbiology laboratory for accurate diagnosis and treatment especially in patients with underlying immunosuppressive diseases.

Keywords

Salmonella Typhimurium Breast abscess Rheumatoid arthritis Extraintestinal salmonellosis Case report

Background

Infections caused by bacteria belonging to Salmonella genus can be presented in five different clinical forms. These are enteric fever, sepsis, enterocolitis, localized organ disease and chronic carrier state [1, 2]. Salmonella spp. are facultative intracellular bacteria. But they can also live freely [3]. They can survive in reticuloendothelial system macrophages and can spread by circulation. If the infection is untreated or resistant to treatment, circulating bacteria can settle in various organs and cause extraintestinal disease [2, 4, 5].

The pathogenesis of extraintestinal Salmonella infections is affected by inoculum size of the ingested bacterium, virulence of the strain, local defence mechanisms and host’s immune response [6]. Advanced age, gastric surgery, immunosuppressive diseases (HIV infection, etc.), immunosuppressive therapy malignancy (metastatic cancer, lymphoma, etc.), hemoglobinopathies, iv drug use, diabetes and passed trauma at the site of infection are risk factors blamed for localized extraintestinal Salmonella infections [2, 3, 79].

Staphylococcus aureus is the most common cause of breast abscess. Furthermore, streptococci, gram-negative bacilli, and anaerobes may cause breast abscess [1, 7, 10, 11]. Breast abscess due to Salmonella is rare and late complication of enteric fever [4]. Breast abscess were reported to develop after Salmonella enterica serotype Typhi and Paratyphi infections. But breast abscesses related to the non-typhoidal Salmonella are extremely rare [1, 8].

Here we present a case of breast abscess due to S. Typhimurium in a non-lactating 43-year-old female patient with rheumatoid arthritis (RA) and we have made a brief review Salmonella breast abscess cases in literature so far.

Case presentation

A 43-year-old female patient referred to our hospital’s emergency department in August 2014 with complaints of fever and severe pain in right breast. She noticed a soft lump and mild pain in her breast a week back. The intensity of pain increased gradually and for the last 2 days and her temperature increased. The patient had a history of 5 years of RA. The patient was not pregnant or lactating. She had three children with the last one delivered 6 years back.

On physical examination, the right breast was tender and swollen. A mobile, sensitive, soft, fluctuating mass of around 4 by 5 cm located in the right lower quadrant was palpable. The mass was not fixed to the upper skin. The upper skin was warm and erythematous. There was no nipple retraction or discharge from the nipple. Axillary lymph nodes were not palpable. The patient’s respiratory, digestive, nervous system physical examinations were normal. Physical examination of the musculoskeletal system revealed swelling in 2nd and 3rd proximal interphalangeal joints of the right hand and swelling and limitation of motion in the right knee.

Ultrasonography (USG) of the right breast revealed a heterogeneously hypoechoic deep-seated irregular collection of approximately 40×38 mm size. The patient was diagnosed with a breast abscess. The abscess was drained by USG guided drainage, and oral amoxicillin clavulanic acid 625 mg bid therapy was started empirically.

The drained fluid was sent to medical microbiology laboratory in a tightly capped, sterile container. On macroscopic examination, it was observed that the material had yellowish cream colour and dense consistency. Gram staining of the material showed abundant polymorphonuclear leukocytes and gram-negative bacilli. The material was inoculated on 5 % sheep blood and eosin methylene blue (EMB) agars plates. One of the sheep blood agar plates was incubated under anaerobic conditions. After incubation at 37 ° C for 24 h smooth, straight-edged colonies without hemolysis grew on sheep blood agar. On EMB agar, lactose-negative colonies were detected which tested negative for oxidase production. These colonies were identified as Salmonella species by Phoenix BD (Becton, Dickinson, USA) automated system and Salmonella group by Maldi-TOF MS (bioMérieux, France). The microorganism was identified as Salmonella enterica serotype Typhimurium according to the Kauffmann-White scheme by using specific antisera (Difco, Becton, Dickinson, USA). No anaerobic bacteria were isolated. The microorganism was found susceptible to ampicillin, ciprofloxacin, trimethoprim-sulfamethoxazole, erythromycin, chloramphenicol, ceftazidime, and ceftriaxone by antibiotic susceptibility testing with Phoenix BD (Becton, Dickinson, USA) automated system.

The patient was called back to the surgical outpatient clinic to obtain a detailed history. It was learned that 2 months ago she had diarrhoea for approximately 3 days and did not receive any antibiotic treatment. The patient had RA for 5 years and was on prednisone therapy. There was no history of contact with animals or trauma to breasts. There was no history of similar swelling in the other breast; no history of diabetes mellitus, hypertension, bronchial asthma, and tuberculosis. When the patient’s laboratory tests were examined leukocyte count was 12,400/mm3 (83.9 % neutrophils), hemoglobin was 13.3 g/dL, fasting blood glucose was 108 mg/dL, erythrocyte sedimentation rate was 31 mm/h, CRP was 32 mg/l, RF was 28 IU/ml and anti CCP was 267.9 U/mL. Alkaline phosphatase, amylase, aspartate aminotransferase, alanine aminotransferase, gamma-glutamyl transpeptidase, bilirubin levels were within normal limits. HBsAg, anti-HCV and anti-HIV (ETI-MAX 3000 analyzer; DiaSorin S.p.A., UK), anti-HBc (Cobas 6000 analyzer, Roche Diagnostics, USA) tests were found to be negative. Chest X-ray was normal. Stool, urine, and blood samples were obtained for culture and found negative for Salmonella spp. Gruber Widal test was also found negative. Figure 1 shows a timeline of events.
Fig. 1

Timeline of events since the patient was diagnosed with Rheumatoid arthritis (RA)

The patient was fully treated with the surgical draining of the breast abscess under general anaesthesia and oral ciprofloxacin 500 mg twice daily. At the end of 2 weeks, the patient was fully healed with no clinical signs of abscess. The control examination with USG after 4 months showed no sign of recurrence of the abscess.

Discussion

Pregnancy, lactation, breast malignancy, hematoma, advanced age, gastric surgery, previous local trauma and drug abuse are known predisposing factors for breast abscess [1, 2, 4, 7, 8]. The case we reported here did not have any of these risk factors. But our patient had RA as an underlying disease and was using immunosuppressive drugs. RA patients have an increased risk of developing infectious diseases. The increased risk of infection in RA patients found to be associated with three factors: The nature of pathophysiology of the disease, comorbid chronic diseases and usage of immunosuppressive therapy for the treatment of the disease [12]. In recent studies, it is observed that immune system (especially T cells) ages prematurely in RA patients and they become inadequate in defence against infectious agents [1316].

The patient had no history of contact with animals. When the patient’s history was reviewed, it was revealed that the patient had an episode of gastroenteritis. We suppose the patient might have had a gastroenteritis related to Salmonella, but we cannot be sure since no stool sample was taken at the time of gastroenteritis. Focal salmonellosis is thought to occur secondary to bacteraemia after gastroenteritis. Patients with severe underlying conditions are known to be prone to focal infections [9]. The patient’s breast might have became infected during a transient bacteriemic episode originating from patient’s bowel and immunosuppressive state of the patient might have facilitated formation of the abscess. Localized Salmonella infection may occur after seeding of bacteria due to overt or silent bacteremia [1]. Secondary bacteremia develops in 3–8 % cases of non-typhoidal Salmonella infection, and localized infection may only occur 5–10 % of these [7]. Salmonella bacteremia in patients with severe immune system impairment found to be associated with increased risk of extraintestinal disease [7]. Previously extraintestinal Salmonella infections have been reported in patients who have had rheumatologic diseases (systemic sclerosis, systemic lupus erythematosus) and been receiving immunosuppressive therapy [2]. In our case, we think that having 5 years of RA and using immunosuppressive therapy might be contributing factors for formation of S. Typhimurium breast abscess.

S. Typhimurium had been isolated previously from septic arthritis, meningitis, hemorrhagic pleural effusion, brain abscess, parapharyngeal abscess [2, 9]. We have done a literature review, and we concluded that this is the first case report of a breast abscess associated with S. Typhimurium.

When we made a literature review we found that the reported cases of breast abscess are mostly due to S. Typhi and Paratyphi infections. On the other hand, breast abscesses related to the non-typhoidal Salmonella isolates are very rare [8]. Table 1 shows the reports of breast abscess cases due to S. Typhi and Paratyphi infections when a literature search using Pubmed and Medline was done. It is interesting that most of the cases were from India where these infections are endemic. Typhoid breast abscesses have been reported to develop in 0.9 % of the patients with generalized S. Typhi infections [1, 7]. The first reported case of breast abscess was by Thayer and Hazen, who isolated S. Typhi from the breast abscess of a young housemaid presenting to the Johns Hopkins Hospital, Baltimore in 1907 [17]. Madelung had stated that until 1923 there were only 30 cases of Salmonella breast abscess case reports in the literature. Madelung ve Erbslöh said that in the breast abscess cases overlying skin was not erythematous and S. Typhi isolated from abscess was not in pure colony form, it was often part of a mixed growth. But later reports stated the opposite [11, 18]. In our case, S. Typhimurium was isolated in pure culture form, and the overlying breast skin was erythematous. Klose ve Sebening stated in 1930 that mastitis develops in only 0.3 % of the patients with typhoid fever. But Pezinski examined 1196 cases of typhoid fever in 1937 and determined that frequency of breast abscess in the general population was 0.5 % and when only female patients were considered this frequency was 0.9 % [11, 18, 19]. Fernando et al. said that between 1970 and 2012, fewer than 15 breast abscess cases due to S. Typhi have been reported [4].
Table 1

Clinical features of reported cases of breast abscess due Salmonella enterica serotype Typhi and Paratyphi. (Source: PubMed, Medline)

Year of publication

Reference number

Author

Patient age

Gender

Underlying condition

Species

Unilateral/bilateral breast abcess

1907

[17]

Thayer and Hazen

16

Female

None

S. Typhi

Unilateral

1972

[18]

Barrett and MacDermot

43

Female

None

S. Typhi

Unilateral

1994

[20]

Lalitha and John

Unknown

Unknown

Unknown

S. Typhi

Unknown

2003

[5]

Jayakumar et al.

40

Female

Fibroadenoma of the breast

S. Typhi

Unilateral

2007

[21]

Delori et al.

54

Female

None

S. Typhi

Unilateral

2007

[22]

Mahajan et al.

Unknown

Female

Immunocompromised

S. Typhi

Unilateral

2009

[10]

Singh et al.

35

Female

None

S. Typhi

Bilateral

2011

[19]

Singh et al.

29

Female

None

S. Typhi

Bilateral

2011

[23]

Vattipally et al.

28

Female

None

S. Typhi

Unilateral

2012

[4]

Fernando et al.

33

Female

None

S. Paratyphi A

Unilateral

2012

[24]

Kumar et al.

60

Female

Diabetes Mellitus

S. Typhi

Unilateral

2012

[25]

Siddesh and Sumana

33

Female

None

S. Paratyphi A

Unilateral

2013

[11]

Banu et al.

40

Female

None

S. Typhi

Unilateral

2014

[26]

Ghadage et al.

31

Female

None

S. Paratyphi A

Unilateral

2015

[6]

Sood

37

Female

Diabetes Mellitus Type 2, hypothyroidism

S. Paratyphi A

Unilateral

2016

[27]

Elumalai and Seetharaman

Unknown

Unknown

Unknown

S. Typhi

Unknown

Breast abscess due to Salmonella spp. has also been observed in the neonatal period. Multi-drug resistant Salmonella isolation from breast abscesses has been reported. In a study Singh et al. retrospectively evaluated the reported cases of Salmonella breast abscess in the literature and concluded that most of the patients were between 23 and 45 years of age, immuno competent, non-lactating women. But they could not find a common predisposing factor [19].

There are few cases of breast abscess related to the non-typhoidal Salmonella isolates reported in the literature (Table 2). Edelstein et al. stated that until 1993 there were only six breast infection involvement cases related to non-typhoidal Salmonella isolates reported in the literature. Only two cases of these were breast abscesses the rest were mastitis cases [1]. Apart from the case which was reported in 2011 by Brncic et al., in none of the reported non-typhoidal Salmonella breast abscess cases the patient had a history of gastrointestinal disease. In contrast, our patient had a history of gastroenteritis passed 2 months ago.
Table 2

Clinical features of reported cases of breast abscess due non-typhoidal Salmonella isolates. (Source: PubMed, Medline)

Year of publication

Reference number

Author

Patient age

Gender

Underlying condition

Species

Unilateral/bilateral breast abcess

1993

[1]

Edelstein et al.

28

Female

None

Salmonella serogroup B, serotype Reading

Unilateral

2000

[28]

Razeq et al.

47

Female

None

Salmonella enterica serotype Landwasser

Unilateral

2010

[8]

Benwan et al.

23

Female

None

S. enterica serotype Poona

Bilateral

2011

[7]

Brncic et al.

70

Male

Diabetes Mellitus Type 2

S. enterica serotype Enteritidis

Unilateral

2014

[29]

Mohamed and Asnis

66

Female

Breast cancer and bilateral breast implants

S. enterica serotype Enteritidis

Unilateral

Conclusions

Although non-typhoidal Salmonella spp. are rare causes of breast abscess they should be kept in mind when a breast abscess occurs in a patient who have immune suppressive diseases or in a patient who use immunosuppressive drugs. Therefore, breast abscess material of these patients should be sent to the microbiology laboratory for proper diagnosis or diagnosis can be missed.

Abbreviations

CCP, cyclic citrullinated peptide; CRP, C-reactive protein; EMB, eosin methylene blue; HBc, hepatitis B core; HBsAg, hepatitis B surface antigen; HCV, hepatitis C virus; HIV, human immunodeficiency virus; Maldi-TOF MS, matrix-assisted laser desorption/ionization mass spectrometry; RA, rheumatoid arthritis; RF, rheumatoid factor; USG, ultrasonography

Declarations

Acknowledgements

The authors wish to acknowledge the patient.

Funding

The authors declare that funding was not utilized for the preparation of this manuscript.

Availability of data and materials

All available data is presented in the main paper.

Authors’ contributions

IB was involved collection of the patient’s data, conducting the literature review, doing laboratory tests, analysis of data and drafting of the manuscript. NA involved in supervision of the laboratory tests and revised crucially the manuscript for important intellectual content. AA involved in analysis of data and drafting of the manuscript. All authors read and approved the final manuscript.

Competing interests

The authors declare that they have no competing interests.

Consent for publication

Written informed consent was obtained from the patient for publication of this case report. A copy of the written consent is available for review by the Editor of this journal.

Ethics approval and consent to participate

Our ethics committee waived the requirement of ethics approval because all medical and laboratory procedures are routinely carried out and do not affect decisions concerning treatment.

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Authors’ Affiliations

(1)
Medical Microbiology Department, Ankara Numune Training and Research Hospital

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Copyright

© The Author(s). 2016

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