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Poststaphylococcal coagulase negative reactive arthritis: a case report

Abstract

We report a case of a 49-year-old patient who developed poststaphylococcal coagulase negative reactive arthritis. The woman presented with constitutional symptoms, arthritis, urinary infection and conjunctivitis. The blood culture was positive for the staphylococcal coagulase negative infection. Erythrocyte sedimentation rate and C-reactive protein were elevated, whereas the rheumatoid factor was negative. Radiographic findings confirmed diagnosis of pleuropneumonia, and one year later of chronic asymmetric sacroileitis. Physicians should be aware of possible reactive arthritis after staphylococcal coagulase negative bacteremia.

Introduction

Reactive arthritis refers to the acute nonpurulent infection as a complication elsewhere in the body. Human leukocyte antigen B-27 is positive in 60-85% of patients with reactive arthritis but this may also occur in patients who are HLA-B27 negative [13]. Post-staphylococcal coagulase negative reactive arthritis is an uncommon disease entity. Coagulase negative staphylococci, although considerably less virulent than Staphylococcus aureus, are among the causes of different infections. Some of these species are components of the normal human flora found on the skin, oropharynx and vagina. Coagulase negative species like Staphylococcus epidermidis are increasingly associated with hospital-acquired infections, whereas Staphylococcus saprophyticus causes urinary infections [4, 5].

We report a case of reactive arthritis after coagulase negative staphylococcus, which presented with typical clinical and radiographic findings [6].

Case presentation

A 49-years-old Kosovo Albanian woman presented to our clinic with constitutional symptoms, including fatigue, malaise, fever and weight loss. The musculoskeletal symptoms had acute onset. Arthritis was asymmetric and painful with involvement of the upper and lower extremities such as wrists, the first proximal interphalangeal joint (PIP) of the right hand, knees, ankles, and also the lumbosacral spine.

At the admission, her body temperature was 37.5°C, pulse rate was regular of 80 beats/min and blood pressure was 130/80 mmHg. The patient could not walk without support. There were no oral or genital ulcers and no skin lesions, and neurological findings were characterized with stiffness of the neck. Also, she had conjunctivitis, and cystourethritis resulting from urinary catheter.

Among the laboratory findings, hematology tests showed white blood cell count of 12.2 × 103/mm3, red blood cell count of 4.0 × 106/mm3, hemoglobin 12.0 g/dl, platelet count 210 × 103/mm3. The erythrocyte sedimentation rate was 57 mm/h and C-reactive protein was 24 mg/dl. Uric acid, C3, C4 components of complements, alanine aminotransferase, aspartate aminotransferase, sodium, potassium, urea, serum creatinine, and blood glucose were all within normal ranges. The urine examinations were positive for bacterial infection. Results revealed negative for autoantibodies, such as rheumatoid factor, antinuclear antibody, antineutrophil cytoplasmic antibody. Albumin was 20.6 g/L, serum IgG was 7.41 g/L and IgG index was 0.55 (Pasteur Cerba Laboratoire, France). Blood culture was positive twice for staphylococcus coagulase negative, and after antibiotic treatment resulted negative. Because of bacteremia and stiffness of the neck, the biochemical parameters of cerebrospinal fluid were performed: total proteins 0.51 g/l, albumin 236 mg/l, IgG 47 mg/l and isoelectric focusing (cerebrospinal fluid and serum); absence of anomaly of the IgG pattern in the cerebrospinal fluid and in the serum (Pasteur Cerba Laboratoire, France). Radiography of the chest showed pleuropneumonia, whereas those of the palms, talocrural and sacroiliac joints had no changes. We followed up on the patient for one year managing the constitutional symptoms, laboratory parameters and radiographic findings. During the follow-up period, the patient experienced many episodes of reactive arthritis approaching the disease chronic onset. After one year, pelvic radiography revealed asymmetric erosive sacroileitis on the right side (Figure 1).

Figure 1
figure1

Anteroposterior radiographs of the pelvis showing asymmetric erosive sacroileitis on the right side.

Based on these findings, we assumed the diagnosis of poststaphylococcal reactive arthritis. Treatment was initiated with Vancomycin based on the antibiogram to cover bacteremia and pleuropneumonia, while NSAIDs and corticosteroids were used for poststaphylococcal reactive arthritis. Clinical, laboratory findings, and lung radiographic changes improved, and the blood culture became negative.

Discussion

Several studies have reported the reactive arthritis after urogenital and enteric infections such as Salmonella, Shigella, Yersinia and Chlamidia, also after poststreptococcal infections, but staphylococcal infection very rarely triggers reactive arthritis [7]. Staphylococcus coagulase negative are present on the skin and mucosa as normal human flora but they can cause bacteremia, diverse prosthetic device-related infections, and urinary infection, whereas Staphylococcus epidermidis is a common cause of catheter-associated urinary tract infections [8]. Most, if not all, of triggering organisms produce lipopolysaccharide (LPS) and share a capacity to attack mucosal surfaces, to invade host cells, and to survive intracellulary [9, 10]. We believe that this is a rare case of reactive arthritis developing after staphylococcal coagulase negative infection. While the detection of coagulase negative staphylococcus at the site of infection or in the bloodstream is not difficult by standard microbiological culture methods, interpretations of these results are frequently problematic. The minimum of two positive blood cultures are required to conclude bacteremia with coagulase negative staphylococcus, which was also our case. After treatment as described above, among other parameters, lung radiographic changes improved.

Conclusion

We report a patient who developed reactive arthritis as a sequel to a staphylococcal coagulase negative infection, and physicians should be aware of possible reactive arthritis after staphylococcal coagulase negative bateremia.

Consent

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

Abbreviations

HLA:

human leukocyte antigen

IgG:

immunoglobulin G

LPS:

lypopolysaccharide

NSAID:

non-steroidal anti-inflammatory drug

PIP:

proximal interphalangeal.

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Author information

Correspondence to Xhevdet Krasniqi.

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Competing interests

The authors declare that they have no competing interests.

Authors' contributions

XK analyzed and interpreted patient data and was a major contributor in writing the manuscript. SR analyzed and interpreted patient data. MG analyzed the data and contributed in writing the manuscript. BK analyzed and interpreted patient data and contributed in writing the manuscript. FA analyzed and interpreted patient data. DK contributed in writing the manuscript. All authors read and approved the final manuscript.

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Krasniqi, X., Rexhepi, S., Gashi, M. et al. Poststaphylococcal coagulase negative reactive arthritis: a case report. Cases Journal 2, 9352 (2009). https://doi.org/10.1186/1757-1626-2-9352

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Keywords

  • Conjunctivitis
  • Coagulase Negative Staphylococcus
  • Urinary Infection
  • Constitutional Symptom
  • Reactive Arthritis