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Cat-induced Pasteurella multocida peritonitis in continuous ambulatory peritoneal dialysis

Article information

Kidney Res Clin Pract. 2014;33(1):65-67
Publication date (electronic) : 2014 January 28
doi : https://doi.org/10.1016/j.krcp.2013.11.003
Il Kim, Young Wook Kim, SungJin Chung, Hye Eun Yoon, Seok Joon Shin
Department of Internal Medicine, Incheon St. Mary’s Hospital, The Catholic University of Korea, Incheon, Korea
⁎Corresponding author. Division of Nephrology, Department of Internal Medicine, Incheon St. Mary’s Hospital, The Catholic University of Korea, 56 Dongsu-ro, Bupyung-gu, Incheon 403-720, Korea. imkidney@catholic.ac.kr
Received 2013 April 22; Revised 2013 September 23; Accepted 2013 October 23.

Abstract

Pasteurella multocida is a zoonotic pathogen found in the oral cavities of both domestic and wild animals. Although P. multocida has been involved in a wide range of human diseases, only a limited number of studies on P. multocida peritonitis in patients undergoing peritoneal dialysis (PD) had been carried out. We herein present the case of P. multocida peritonitis in a patient undergoing continuous ambulatory PD, which is believed to have resulted from contact with cats. We suggest that patients undergoing PD and having domestic animals at home should be educated about the possible transmission of the infection from the animals; in addition, these patients should also maintain a high level of personal hygiene.

Keywords: Cat; Pasteurella multocida; Peritoneal dialysis; Peritonitis

Introduction

Pasteurella multocida is an aerobic Gram-negative coccobacillus, and forms the normal oropharyngeal flora of many animals including household cats and dogs. This microorganism can be transmitted to humans through animal bites, scratches, or licks. Various human infections caused by P. multocida have been reported, including soft-tissue infections, pulmonary infections, meningitis, septic arthritis, and spontaneous bacterial peritonitis in patients with cirrhosis [1]. P. multocida is a rare cause of peritoneal dialysis (PD)-related peritonitis, and most reported cases were related to patients undergoing continuous cycling PD (CCPD; 75% of reported cases) [2]. The first case of infection was reported by Paul and Rostand in Alabama in 1987; since then, there has been an increase in the incidence of P. multocida infections in humans, which is mainly attributed to the increase in the number of people breeding pets in their home [3].

However, thus far, only 26 cases of P. multocida-related peritonitis have been reported in PD patients. Most reported cases are related to patients undergoing cyclic PD [3].

In this study, we present the case of a P. multocida-related peritonitis suspected to be caused through contact between cats and the patient undergoing chronic continuous ambulatory PD (CAPD). This is the first confirmed case of P. multocida infection in a CAPD patient in Korea. Furthermore, standard safety measures are suggested for the CAPD patients to prevent transmission of P. multocida infection from pets.

Case report

A 25-year-old woman with end-stage renal disease due to an unknown cause on CAPD for the past 2 years was admitted to the hospital with a 2-day history of diffuse abdominal pain and cloudy PD effluent. The patient was obese with a blood pressure of 145/95 mmHg, a heart rate of 96 beats/minute, and a body temperature of 38.8°C. An abdominal examination was performed, which revealed distended abdomen with diffuse abdominal tenderness, moderate guarding with no rebound, and hypoactive bowel sounds. There was no evidence of exit-site or catheter tunnel infection. The tubing of the PD catheter was intact with no visible evidence of damage.

Results of laboratory tests revealed the following measurements: white blood cell (WBC) count, 12,860 cells/mm3; hemoglobin, 11.3 g/dL; hematocrit, 33.7%; platelet count, 337×103/mm3; blood urea nitrogen, 42.4 mg/dL; and creatinine, 5.1 mg/dL. The patient’s turbid effluent was inoculated (approximate volume: 10 mL) in two blood-culture bottles. Following this, 50 mL of dialysate was collected and centrifuged. The sediment after centrifugation was processed for further culture procedures. Under suspicion of peritonitis, the patient was treated with empirical intraperitoneal cefazolin and gentamicin. The patient’s initial dialysate WBC count was 4,992/mm3 with 98% polymorphonuclear (PMN) cells, and the red blood cell count was 86/mm3. Gram staining of the collected peritoneal fluid was negative. Bacterial culture results indicated that the organism was P. multocida, which was found to be sensitive to ampicillin, ampicillin/sulbactam, cefazolin, gentamicin, imipenem, levofloxacin, and trimethoprim/sulfamethoxazole. The organism was identified by a commercial identification kit (VITEK 2 g-negative identification card, bioMérieux, Inc., Marcy l'Etoile, France). Other peritoneal effluent cultures including fungal and acid-fast bacillus cultures were negative. After antibacterial therapy for 4 days, the patient’s dialysate WBC count decreased to 54/mm3, her abdominal symptoms improved, and the turbid dialysate became clear. Antibiotics were administered for 10 more days and she was discharged without any complications.

Upon further questioning regarding the home CAPD environment, the patient revealed that she had three cats at home. However, she stated that CAPD exchange was performed only in her room and did not find any puncture or tearing of dialysis bags, and therefore, she was unsure whether the cats had come into the room and had contact with the CAPD bags and tubes.

Discussion

Despite technological improvements, PD-related peritonitis due to P. multocida infection caused by contact with contaminated pets continues to be a problem, and most reported cases were related to patients undergoing CCPD. However, the CAPD procedure requires patients to have dialysis kits (bags and tubes) at home, and a majority of these patients have pets in their home. Therefore, when CAPD patients carry out their own dialysis at home, there is an increased incidence of transmission of the P. multocida infection from the animals to the owners.

However, in the presented case, there was no documented CAPD line puncture or leakage, and therefore, the possible route of transmission is through her cats’ scratches or licks when she left her dialysis room, or transmission of the oropharyngeal colonization with P. multocida to her hands or dialysis supplies.

A majority of PD-related peritonitis cases caused by P. multocida have been associated with pet cats; regular contact with domestic cats, cat bites, or scratches of dialysis tubes had been reported in 92.6% of patients with PD-related peritonitis (25/27 cases) [3]. It is known that P. multocida colonization is found in the oral cavity of cats (70–90%) and dogs (66%) [1]. In addition, it is also reported that one-third of healthy livestock breeders were found to be oropharyngeal carriers of this pathogen [4]. Although PD-related peritonitis cases caused by P. multocida have been reported worldwide, the present case is the first to be reported in Korea.

Despite the preponderance of CAPD, PD-related peritonitis cases caused by P. multocida less frequently occurs in patients undergoing CAPD than in patients using cycling devices (7/27 cases including the present case) [3]. The reason for this is not clear, but it is postulated that the relatively short time of PD exchange gives less chance for cats to come into contact with dialysis tubes. Furthermore, long tubes necessary for cyclic PD seem to be more attractive toys for cats [2]. The clinical characteristics of P. multocida peritonitis in patients undergoing CAPD are not different from those in patients using cycling devices, and are summarized in Table 1.

Previous case reports on peritoneal dialysis peritonitis caused by Pasteurella multocida

The symptoms of PD-related peritonitis caused by P. multocida begin within 24 hours and improve within 48–96 hours of the initiation of antibiotics therapy [4]. Previous studies have reported that the common symptoms of PD-related peritonitis cases caused by P. multocida are low- to moderate-grade fever, severe abdominal pain, and cloudy dialysate. Dialysate of PD-related peritonitis caused by P. multocida has a wide range of WBC counts (200–16,000 cells/mm3) with increased levels of PMN leukocytes. However, Gram staining of dialysate or blood culture is usually negative [4].

It is reported that P. multocida is susceptible to antibiotics, including penicillin, ampicillin, amoxicillin–clavulanic acid, aminoglycosides, fluoroquinolones, cephalosporins, and vancomycin. Although the duration of antibiotic therapy has not yet been determined, results of previous reports suggest that 2–3 weeks of intraperitoneal antibiotic treatment should suffice [5].

Besides clinical therapies, because there is a possibility of transmission of P. multocida infection through contact (e.g., biting and scratching) with an infected animal, these pet animals should be kept away from PD catheters, bags, or tubes while the patients perform their own dialysis at home. The more desirable way to prevent transmission of infection is not to have a pet at the patient’s home.

In conclusion, we report a rare case of PD-related peritonitis caused by P. multocida in a CAPD patient. There was no evidence of puncture of dialysis tubes or leakage of PD fluid, and therefore, we suspected possible contamination of the dialysis bags by household cats’ scratches or licks when the patient left the dialysis room. There was also a possibility of transmission of patient’s oropharyngeal colonization with P. multocida via her hands to the dialysis supplies. Because many people have pets at home, they should be reminded that pets are a possible source of peritoneal contamination for PD patients. Therefore, domestic animals should be kept away from PD catheters, bags, or tubes and should not be allowed in the room during exchanges.

Conflicts of interest

The authors declare there is no conflict of interest.

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Article information Continued

© 2014. The Korean Society of Nephrology. Published by Elsevier.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Table 1

Previous case reports on peritoneal dialysis peritonitis caused by Pasteurella multocida

References Age (y)/Gender Dialysis mode Animal contact Dialysate culture Antibiotics
Frankel et al [6] 55/Male CAPD Cat exposure Positive Gentamicin, ciprofloxacin
Kitching et al [7] 75/Male CAPD Cat bite Positive Cefamandole
MacKay et al [8] 73/Male CAPD Cat exposure Positive Ceftazidime
Cooke et al [9] 73/Female CAPD Cat exposure Positive Gentamicin, ciprofloxacin
Antony et al [5] 48/Female CAPD Dog exposure Positive Cefazolin, gentamicin
Sol et al [3] 7/Female CAPD Cat exposure Positive Ampicillin
Present case 25/Female CAPD Cat exposure Positive Cefazolin, gentamicin
Loghman et al [10] 12/Female CCPD Cat exposure Positive Gentamicin
Chadha et al [11] 16/Male CCPD Cat bite Positive NA
Malik et al [12] 21/Female CCPD Cat exposure Positive Gentamicin, ceftriaxone
Van et al [13] 22/Female CCPD Cat exposure Positive Ciprofloxacin
Kanaan et al [14] 24/Female CCPD Dog, cat exposure Positive Ciprofloxacin
Elsey et al [15] 25/Male CCPD Cat exposure Positive NA
Rondon et al [4] 38/Male CCPD Cat exposure Positive Ampicillin, levofloxacin
Mugambi et al [1] 36/Female CCPD Cat exposure Positive Ciprofloxacin
Uribarri et al [16] 42/Female CCPD Cat, dog exposure Positive Gentamicin, penicillin
Musio et al [17] 46/Female CCPD Cat exposure Positive Ciprofloxacin, piperacillin
Breton et al [18] 46/Female CCPD NA Positive Ceftazidime
Olea et al [19] 46/Female CCPD Cat exposure Positive Ceftazidime
Sillery et al [20] 46/Female CCPD Cat exposure Positive Ampicillin
Hamai et al [21] 49/Male CCPD Cat exposure Positive Cefazolin, tobramycin
Mat et al [2] 52/Male CCPD Cat exposure Positive Cefazolin
London et al [22] 54/Male CCPD Cat exposure Positive Cefazolin
Paul et al [23] 55/Female CCPD Cat exposure Positive Gentamicin
Joh et al [24] 55/Male CCPD Cat exposure Positive Gentamicin, ampicillin/sulbactam
Malik et al [12] 58/Male CCPD Cat exposure Positive Gentamicin
Satomura et al [25] 58/Male CCPD Cat exposure Positive Cefazolin, ceftazidime

CAPD, continuous ambulatory peritoneal dialysis; CCPD, continuous cycling peritoneal dialysis; NA, not applicable.