Prosthetic joint infection caused by Pasteurella multocida: a case series and review of literature
BMC Infectious Diseases volume 16, Article number: 435 (2016)
Pasteurella multocida is a well-recognized zoonotic agent following dog or cat bites or scratches. Nevertheless, prosthetic joint infection caused by P. multocida are rarely reported.
We report here a series of six cases of prosthetic joint infection caused by P. multocida managed at a referral centre for the treatment of bone and joint infection in southern France. We also reviewed the 26 cases reported in literature.
The mean age of our cases was 74 years [±8.2, range 63–85]. In majority of our cases (5 cases) were associated with knee prostheses and one case with a hip prosthesis. Most of cases occurred after cat or dog scratches or licks or contact. Diagnoses of prosthetic joint infection caused by P. multocida were made by positive cultures of surgical biopsies or needle aspiration. Mean time delay between prosthetic joint implantation and infection onset was 7.6 years (±5.12 years, range 2–17). Local inflammation, which occurred in all six cases, was the most frequent clinical symptom, followed by pain in five cases, fever and swollen joints in four cases, and a fistula with purulent discharge inside the wound in two cases. The mean time of antibiotic therapy was 8 months. Surgical treatment with prosthesis removal was performed in three cases. Six of our cases were in remission without apparent relapse at 3 years after end of treatment.
Prosthetic joint infections caused by P. multocida usually occur after animal scratches or bites, but can occasionally occur after a short animal lick. These infections are usually resulting from a contiguous infection and localized in the knee. An early antibiotic therapy after surgical debridement could avoid prosthetic withdrawal, notably in elderly patients. Patients with prosthetic joints should be warned that animals are potential sources of serious infection and urgent medical advice should be sought if they are bitten or scratched.
The number of prosthetic orthopaedic implants has increased, and the frequency of infections that can be attributed to these prostheses is a real public health problem . Prosthetic joint infections typically result from infections with aerobic bacteria such as Staphylococci, Streptococci, Enterococci and Gram-negative bacilli .
Zoonotic prosthetic joint infections have been reported in previous studies such as prosthetic joint infection caused by Brucella sp. , Salmonella sp. , and Campylobacter sp. . A recent case of hip prosthetic infection due to Streptococcus suis has been reported in a 74-year-old male American farmer with a history of non-Hodgkin’s lymphoma .
Pasteurella multocida is a Gram-negative nonmotile coccobacillus found worldwide. It can be found in the nasopharynx or gastrointestinal tract of wild animals, cats and dogs . Human infections with P. multocida are most often the result of direct tissue inoculation and usually take the form of an acute local cellulitis, tenosynovitis or osteomyelitis. Septicaemia, meningitis, peritonitis and pneumonia have also been reported .
Prosthetic joint infection due to P. multocida is rare, as only 26 cases have been reported in the literature to date. These prosthetic joint infections due to P. multocida were associated with the same comorbidities as for other prosthetic joint infections  and precession by a cat or dog bite, scratching or licking distal to the affected joint . The aim of this study was to review all the cases of prosthetic joint infection caused by P. multocida among the cases of prosthetic joint infection managed in a referral centre for the treatment of bone and joint infections (CRIOA) in southern France.
We retrospectively reviewed all cases of prosthetic joint infection caused by P. multocida among the 4686 cases of prosthetic joint infection in 14,200 patients (inpatients and outpatients >18 years) managed for bone and joint infection from January 1993 to December 2013. This study was approved by the institutional research ethics board and a written informed consent was signed by each patient. All cases were managed at the inter-regional referral centre for the treatment of bone and joint infection in southern France, grouping together four University Hospitals and a military teaching hospital with a total of 4000 beds in Marseille, France, where a local population of approximately 852,516 was recorded in January 2012.
All episodes of prosthetic joint infection caused by P. multocida were diagnosed based on past medical history with clinical evidence of infection using biological and/or radiological compliant data, with at least one positive culture of P. multocida identified from ≥ 2 deep samples based on a surgical procedure that excluded bacterial contamination. Infections involving a prosthetic joint were classified according the time of onset after implantation: early infection within a month or chronic infections after 1 month . We recorded the medical history, assessing factors such as the demographic characteristics of patients, and risk factors associated with Pasteurella prosthetic joint infection, including medical history of animal bites or scratches, cancer, haematological malignancy, systemic or local corticosteroid treatment, diabetes mellitus and alcoholism. We also recorded the location of the Pasteurella prosthetic joint infection. We individually reviewed the antibiotic treatment and/or surgical treatment approach used. The clinical outcome was evaluated at 1, 3, 6, 12 and 24 months after the end of antibiotic treatment.
Specimen collection and microbiological analysis
Deep samples obtained by surgical procedures, i.e., joint fluids, crushed tissue or bone biopsies, were inoculated on 5 % sheep blood, chocolate, Mueller-Hinton, trypticase soy and MacConkey agar plates (BioMérieux, France) and incubated at 37 °C in a 5 % CO2 atmosphere and in an anaerobic atmosphere for 10 days. For mycobacterial culture we inoculated the samples in the MGIT tubes (Becton Dickinson, Pont-De-Claix, France) or on a home-made 5 % sheep blood agar (BioMérieux, La Balme-les-Grottes, France) for 2–45 days at 32 °C or 37 °C as previously described [11, 12]. Pure bacterial cultures, obtained by picking isolated colonies, were identified with semi-automated Gram staining (Aerospray Wiescor, Elitech), catalase and oxidase activity tests, and the Vitek 2 system (BioMérieux, Marcy l’Etoile, France). The antibiotic susceptibility of P. multocida isolates were determined and interpreted according to the recommendations of the French Society for Microbiology (http://www.sfm-microbiologie.org/UserFiles/files/casfm/CASFM_EUCAST_V1_0_2014.pdf).
We have identified six cases of prosthetic joint infection caused by P. multocida among the 4686 cases of prosthetic joint infection managed in our centres over the last 20 years. The mean age of our cases was 74 years [±8.2, range 63–85]. A medical history of cat scratches was identified in two cases, dog licks on surgical wound in few days before the beginning of symptoms in two cases and close-contact with cats or dogs in two cases. In two cases occurred after dog lick, culture from the dog’s mouth cavities also yielded P. multocida. Two of our cases had diabetic mellitus and there was one case of class III obesity (body mass index at 55). One of our cases developed breast cancer 4 years after the prosthetic joint infection.
Five of our cases were associated with knee prostheses (Fig. 1) and one case with a hip prosthesis. Mean time delay between prosthetic joint implantation and infection onset was 7.6 years (±5.12 years, range 2–17). Local inflammation, which occurred in all six cases, was the most frequent clinical symptom, followed by pain in five cases, fever and swollen joints in four cases, and a fistula with purulent discharge inside the wound in two cases. Delay between first infectious signs and diagnosis of prosthetic joint infection was poorly reported in literature. Prosthesis loosening was observed in two cases including one case before infection and one case related to infection. None of the cases had positive blood culture of P. multocida.
Diagnoses of prosthetic joint infection caused by P. multocida were made by the positive culture of the percutaneous needle aspiration of articular fluid in two cases, and surgical deep samples in four cases. Surgical treatment was performed in six cases, including surgical lavage and debridement and prosthesis retention in three cases and prosthesis removal in three cases. All six cases received a combination of antibiotic treatment with amoxicillin and doxycycline. The mean time of antibiotic treatment was 8 months, range 6–18 months.
Six of our cases were in remission without apparent relapse at 3 years after end of treatment. One case was infected with S. enteritidis at 3 years after end of treatment on the same prosthesis.
We reported six cases of prosthetic joint infection caused by P. multocida managed in our centers over the last 20 years. The rate of prosthetic joint infection caused by P. multocida is low, representing thus only 0.1 % of all cases of prosthetic joint infection in our experience. To our knowledge, only 26 cases of prosthetic joint infection caused by P. multocida have been reported in the literature [13–35]. The mean age of cases reported was 67 years (±9.6 years, range 33–88 years). Prosthetic joint infections caused by P. multocida were usually a contiguous infection after scratching, biting or licking feet and more frequently localized in the knee than in the hip (21 cases vs. 5 cases) (Table 1). Haematogenous prosthetic joint infections caused by P. multocida were rarely reported and usually affected more than one prosthesis, such as two cases where both knee prostheses were infected after haematogenous dissemination [20, 21].
Most of the cases in the literature occurred after animal bites or scratches, including 17 cases (65 %) after cat bites or scratches and eight cases (31 %) after dog scratches, bites, or licks and one case after a horse bite. Most of our cases involve animal contact or bites, consistent with the zoonotic origin of Pasteurella multocida.
Forty-two percent of the reported cases of prosthetic joint infection due to P. multocida presented at least one comorbidity. In general, diabetes mellitus appears to be a main comorbidity associated with prosthetic joint infections, but this underlying condition was identified in four cases only among the 32 reported cases (2 cases in the literature and 2 in this cases series). The major comorbidity related to prosthetic joint infection caused by P. multocida was rheumatoid arthritis treated with immunosuppressive drugs, which was observed in ten reported cases (38 %). None of our patients had rheumatoid arthritis and none was treated with immunosuppressive drugs, this observation illustrating that this factor is not perhaps as important as it might otherwise seem for prosthetic joint infection due to P. multocida.
Other uncommon comorbidities such as solid cancers have been observed in few reported cases, including one case of leukaemia and one case of breast carcinoma. None of our patients has a medical history of cancer during the management of prosthetic joint infections caused by P. multocida, but one of our patients developed breast cancer within 4 years after her prosthetic joint infection. Immunodeficiency should be considered a risk factor or comorbidity of prosthetic joint infection caused by P. multocida, especially in case of recurrence.
Prosthetic joint infections caused by P. multocida are monomicrobial infections and are sensitive to penicillin and doxycycline. Prosthesis removal remains a main treatment option in the cases reported in literature (14 cases; 54 %) followed by surgical debridement with prosthesis retention (8 cases; 31 %) and antibiotic treatment without surgery (4 cases; 15 %). The remission rate is high (85 %); only four reported cases treated initially with surgical debridement were subsequently treated with prosthesis removal [16, 19, 21, 32]. Three of the four cases had arthritis, one case was bacteremic to P. multocida, and he had a prosthetic joint infection due to P. multocida and Pseudomonas aeruginosa. We didn’t found any microbiologic information concerning the failure after medical treatment . One case had first medical treatment 6 weeks and no surgical debridement . One case had a cemented total knee arthroplasty with unchanged polyethylene tibial insert  (Table 1).
P. multocida appears to be a nonmotile coccobacillus recovered from the nasopharynx or gastrointestinal tract of wild animals, cats and dogs . P. multocida are most often the result of direct tissue inoculation. We can assume that infections are locally contiguous and similar to the acute haematogenous prosthetic joint infection, surgical lavage, debridement and prosthesis retention associated with prolonged antimicrobial treatment should have a high success rate, which is the case in the literature and in our three cases.
P. multocida is known as a virulent pathogen, which has the ability to produce an in vitro biofilm . Nevertheless, the case of P. multocida prosthetic joint infection can be caused by no-biofilm producer isolate . We believe that increasing the studies on the biofilm role of P. multocida isolates in prosthetic joint infection should enable a better understanding of the pathogenesis of this bacterium and a better definition of treatment strategies. According to our findings and literature review, we believe that surgical lavage, debridement and prosthesis retention combined with prolonged antibiotic treatment is sufficient for the treatment of prosthetic joint infection caused by P. multocida.
Generally it is recommended that patients with animal bites receive systematic antibiotics to prevent infections due to P. multocida and other pathogens that form part of the oral animal flora . Animal bites or scratches or licks from pets are a possibility in people with arthroplasty, particularly in the elderly, we think that they should be told of the risks and the action to be taken if it happens. Based on our review, we suggest that patients with orthopedic devices who have been bitten or scratched by animals should be early treated with either penicillin or doxycycline to avoid systemic spread and infection of the prosthesis with P. multocida.
Prosthetic joint infections caused by P. multocida are rare and most commonly follow animal scratches or bites, but can occasionally occur after a short animal lick. Prosthetic joint infections caused by P. multocida were usually localized in the knee resulting from a contiguous infection, but haematogenous dissemination can occasionally affect more than one prosthesis. As there is no clear evidence that P. multocida could generate biofilm, we believe that early antibiotic therapy after surgical debridement could avoid prosthetic withdrawal, notably in elderly patients. However, early treatment after dog or cat scratch, bites or lick in a patient with joint prosthesis may be prevent prosthetic joint infection due to Pasteurella multocida.
CRIOA, Referral centre for the treatment of bone and joint infections “Centre de Référence des Infections Ostéo-Articulaires”; P. multocida, Pasteurella multocida
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The authors thank Catherine Peruffo for her assistance in acquisition of data. The authors obtained permission from Catherine Peruffo to acknowledge.
The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in this manuscript. No writing assistance was utilized in the production of this manuscript.
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The authors declare that they have no competing interests.
EH: 1st author, involved in clinical data collection and the drafting of the manuscript. PS: 2nd and corresponding author, involved in the drafting of the manuscript and manuscript revision. HS: 3rd author, provided clinical data for the 6th case and manuscript revision. POP: 4th author, provided surgical treatment data and manuscript revision. FS: 5th author, provided clinical data verification and revision of the manuscript. AS: last author, provided clinical data verification, corrected the discussion section and approved the final version to be published. All authors read and approved the final manuscript.
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Written informed consent was obtained from by each patient for publication of this case report and any accompanying images. Copies of the written consents are available for review by the Editor-in-Chief of this journal.
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This study was approved by the institutional research ethics board (Comite de Protection des Personnes Sud Méditerranée 1), and written informed consent was obtained from by each patient for publication of this case report and any accompanying images. Copies of the written consents are available for review by the Editor-in-Chief of this journal.
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Honnorat, E., Seng, P., Savini, H. et al. Prosthetic joint infection caused by Pasteurella multocida: a case series and review of literature. BMC Infect Dis 16, 435 (2016). https://doi.org/10.1186/s12879-016-1763-0
- Pasteurella multocida
- Prosthetic joint infection