Journal of Infectious & Non Infectious Diseases Category: Clinical Type: Case Report
Salmonella abscess in a Failed Transplanted Kidney
- Adriana Dejman1*, Heath Catoe2, Jeremy Ramdial3, Warren Kupin4
- 1 Department Of Nephrology, Jackson Memorial Hospital, Miami, FL, United States
- 2 Department Of Internal Medicine, Jackson Memorial Hospital, Miami, FL, United States
- 3 Department Of Hematology And Oncology, Jackson Memorial Hospital, Miami, FL, United States
- 4 Department Of Nephrology, The University Of Miami Health System, Miami, FL, United States
*Corresponding Author:Adriana Dejman
Department Of Nephrology, Jackson Memorial Hospital, Miami, FL, United States
Received Date: Oct 24, 2016 Accepted Date: Jan 12, 2017 Published Date: Jan 26, 2017
This case report details the rare occurrence of Salmonella abscess in a failed kidney transplant. A 53-year-old Jamaican American woman with diabetes type 2 back on dialysis after failure of a kidney transplant presented with a 2 month history of decreased appetite and fatigue subsequently developing malaise and fevers. Evaluation with MRI showed an abscess that engulfed the previous kidney transplant location. After percutaneous drainage, culture of abscess grew Salmonella enteric subspecies sero type Group O: 47, 48 or 50. The patient was sent home on IV antibiotics with subsequent follow-up and drain removal. Although Salmonella abscesses in failed kidney transplant are rare, appropriate treatment can be conservative, similar to other renal abscesses.
An abscess in the kidney is due to salmonellae are rare in the literature and rarer in kidney-transplant patients. The etiology of such abscesses can be difficult to decipher. Salmonella enteric subspecies I serotypes can cause disease in a range of hosts depending on their adaptations. Human host restricted serotypes of typhi, paratyphi A and sendai tend to cause more systemic infections as they are thought to be more adapted to their host. Unrestricted host Salmonella species usually include typhirium and enteritidis and mostly cause self-limited gastroenteritis symptoms but in a range of higher vertebrates . The CDC estimates there are 1.2 million Salmonella infections per year with surveillance data indicating Salmonella serovar enteritidis being the most common serotype followed by Salmonella serovar typhimurium and Salmonella serovar newport. Chicken eggs are known source of these salmonellae outbreaks [2,3]. The patient’s history presents a compelling possibility of a previous systemic infection of Salmonella prior to presentation that could have seeded her kidney transplant leading its destruction via abscess. Although full sero typing was not completed, O antigen reactivity did not indicate it was from one of the common subspecies found on surveillance data. Successful treatment included systemic antibiotics with percutaneous drainage. This case report details the rare possibility of a systemic Salmonella infection seeding and destroying a failed kidney graft with subsequent management.
53-year-old Jamaican woman with history of hypertension, diabetes mellitus type 2 and end-stage renal disease presented to an outside hospital in December 2013. The patient was admitted with altered mental status, fevers, abdominal pain, fatigue and anorexia ongoing for two months, but without diarrhea. Her graft history dates to 2007 after receiving a deceased donor kidney transplant but failed after graft rejection and resumed hemodialysis in February 2013. Her remaining immunosuppression at time of presentation was prednisone. After resuscitation, she recovered mental status, but abdominal pain persisted which prompted imaging with an MRI showing a fluid collection and air pockets in the right lower quadrant of the abdomen, abutting the right psoas muscle. The patient was started on vancomycin at that time due to concern for Staphylococcus aureus. CT guided abscess drainage on day 5 of hospitalization retrieved 20mL of purulent material that was sent for gram stain and culturing. Gram stain showed 5-10 WBCs (1+) and rare 1-2 gram positive cocci per slide; however, despite no gram negative rods in the smear, few colonies of Salmonella grew from automated aerobic cultures on proprietary media. The patient was changed to ciprofloxacin 200mg BID IV on approximately day 8th based on Salmonella sensitivities. She was a febrile for the remainder of her hospital course. Final sero typing on day 16 indicated Salmonella enterica subspecies sero type Group O: 47, 48, or 50. Unfortunately due to time and outside laboratory circumstances, H antigen was not performed and it is unclear if the sample was lost in submission to the California health department. Although this polyvalent sera test indicated O antigens from all subgenera, it contained only the several rare forms of Salmonella entericasubspecies enterica associated with human infections. Blood cultures were negative throughout her hospital course. Acid fast bacillus and fungal cultures were also negative. She was then transported to our facility on day 17. Upon transfer, investigation revealed a total WBC count of 10,900/ mcL with an absolute Neutrophil count of 7,300/mcL. Urinalysis was not done since the patient was anuric. CT scan with contrast confirmed abscess in the renal transplant displaying no apparent kidney parenchyma and a 5.9 x 5.5 x 10.0 cm collection (Figure 1).
Figure 1: CT scan coronal view of abdomen showing transplanted kidney with air cavities and ablation of normal parenchyma.
No other collections or sites of infection were identified. Blood cultures and repeated catheter drainage cultures were negative with patient remaining afebrile. We continued her hemodialysis and adjusted ciprofloxacin dose to 400mg IV QD for dosing convenience. The patient retained a cavity approximately 10cc in size that was drained and lavaged with debridement (Figure 2A).
Figure 2A: Abscessogram demonstrating 10cc cavity 2 weeks after discharge.
Surgical resection was discussed but it would be a high risk vascular surgery as opposed to continued drainage with antibiotics. Patient was switched to IV ceftriaxone 2g QDon day 23 for 6 weeks via peripherally inserted central catheterline for easier compliance and sent home on day 25th after drain tube exchanged. Abscessogram approximately 3 months after admission showed an 8cc cavity and drain was removed for a trial period (Figure 2B). The patient has no recorded recurrence of infection for several months.
Figure 2B: An 8cc cavity remaining 3 months after discharge.
An alternative etiology hypothesis is that she may have contracted the infection through hemodialysis. Bacteremia is higher in patients on hemodialysis which could have lead to seeding, but Staphylococcus aureus is the major pathogen associated with hemodialysis and this was not detected in our patient . On the contrary, her risk for infection in general may have been increased by several other factors.
Immunosuppression after renal allograft rejection shows decreased risk of sensitization at the expense of an increased risk of infections . However our patient had been off antimetabolites and calcineurin inhibitors for almost one year. Although she may have had some protective factors in the retained kidney transplant, our patient was at an increased risk for bacterial infections and renal abscesses in particular as she is diabetic which leads to increased urinary tract infections and impairment of immune system functions [9-12].
Salmonella abscesses are rare and reported in only a few case reports [13-22]. The literature shows that treatment can range from conservative to invasive for renal Salmonella abscesses [23-26]. Management varied but usual treatment included percutaneous drainage with susceptible antibiotic treatment by IV or PO of antibiotics ceftriaxone, ciprofloxacin and evenofloxacin. In one case, percutaneous drainage failed with treatment proceeding to nephrectomy with 2 weeks post-op antibiotics of ciprofloxacin. However, to our knowledge this is the first case report of a renal abscess due to Salmonella in a failed kidney graft. Due to ongoing infection with a risk of seeding, surgical removal was not done. Our patient was treated with percutaneous drainage and antibiotics with a good response.
Appropriate management of renal abscesses in general is more clearly defined than specifically Salmonella renal abscess. Before the widespread use of antibiotics, S. aureus was the predominant organism causing renal abscesses; however, the majority of organisms now are gram negative . One current scheme for treatment of renal abscess is based on size with a 3-5 cm renal abscess being amenable to multiple weeks of IV antibiotics alone; however this is considered in immunocompetent patients [28-30]. Elevation of treatment would be percutaneous drainage which has a high cure rate and is usually considered in abscesses larger than 5 cm [10,28,31-33]. Larger than 5 cm is associated with increased need for surgical drainage or multiple percutaneous drainage procedures . Several factors are associated with antimicrobial treatment failure including large abscess, obstructive uropathy, severe vesicoureteral reflux, diabetes, old age and urosepsis with gas forming organisms . Drainage should be considered if no clinical improvement occurs in 2-3 days of appropriate antibiotics .
In patients, especially renal transplant recipients, renal abscess due to salmonellae is a rare occurrence. This rare case demonstrates a renal abscess in immunosuppressed patients with a kidney transplant can have rare microbiologic etiology. Further conservative management with percutaneous drainage and antimicrobials could potentially be curative. We corroborate that management of a failed renal graft is an important part of renal transplant planning and treatment.
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Citation:Catoe H, Ramdial J, Dejman A, Kupin W, (2017) Salmonella Abscess in a Failed Transplanted Kidney. J Infect Non Infect Dis 3: 019.
Copyright: © 2017 Adriana Dejman, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.