|CASE REPORT: BACTERIOLOGY
|Year : 2013 | Volume
| Issue : 2 | Page : 69-71
Mycobacterium fortuitum infection following inguinal hernia repair with mesh: A case series
Kundoly Velayudhan Suseela1, Oommen Ninan Ashok2, Kizhakke Ambramoli Sathiavathy1
1 Deparment of Microbiology, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
2 Deparment of Surgery, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
|Date of Web Publication||7-Jan-2014|
Kundoly Velayudhan Suseela
Deparment of Microbiology, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala
Source of Support: None, Conflict of Interest: None
Rapid growing mycobacteria (RGM) are notorious for chronic infections and non-healing surgical wounds. There are reports of infections of implants by RGM, particularly Mycobacterium fortuitum. These conditions necessitate wound exploration to find out the actual pathogen. Herein, we report three cases of M. fortuitum infection following inguinal hernia repair with mesh.
Keywords: Inguinal hernia repair, mesh, Mycobacterium fortuitum
|How to cite this article:|
Suseela KV, Ashok ON, Sathiavathy KA. Mycobacterium fortuitum infection following inguinal hernia repair with mesh: A case series. J Acad Clin Microbiol 2013;15:69-71
|How to cite this URL:|
Suseela KV, Ashok ON, Sathiavathy KA. Mycobacterium fortuitum infection following inguinal hernia repair with mesh: A case series. J Acad Clin Microbiol [serial online] 2013 [cited 2017 May 23];15:69-71. Available from: http://www.jacmjournal.org/text.asp?2013/15/2/69/124592
| Introduction|| |
Rapid growing mycobacteria (RGM) like Mycobacterium fortuitum, Mycobacterium chelonae and Mycobacterium abscessus are widely distributed in the environment. They can contaminate water supplies, reagents and wash solutions used in the hospitals. A wide variety of infections of skin and implants have been reported. ,, Three patients appeared in our hospital with pus discharge from the inguinal hernia repair site.
| Case Reports|| |
A 50-year-old man was admitted with complaints of swelling and pus discharge in the right inguinal region. He gave the history of repair of hernia 1 month back in the same site. On examination, a pre-peritoneal mesh with abscess was seen. Pus sample from the wound on culture yielded Pseudomonas aeruginosa. Patient was treated with Piperacillin/Tazobactum combination according to the susceptibility pattern, but was not responding. So, an exploration was done and the mesh was removed. Pus sample was sent to the microbiology laboratory.
Gram stain of the pus showed pus cells and necrotic material. No bacteria were seen. On culture, tiny pale pink colonies appeared on MacConkey Agar (MA) after 48 h of incubation at 37°C. The size of the colonies increased to 3 mm on prolonged incubation for two more days [Figure 1]. Gram staining of the growth showed Gram-positive bacilli with beaded appearance. Acid-fast staining using 3% acid alcohol for decolourisation showed acid-fast bacilli (AFB) [Figure 2]. On Lowenstein Jensen (LJ) medium also, the growth appeared after three days of incubation at 37°C and became buff coloured on continuous incubation for two more days [Figure 3]. On subculture on MA, the bacteria grew at room temperature also. Nitrate reduction test was positive.
On preliminary identification of the isolate as M. fortuitum, the patient was treated with Clarithromycin and Ciprofloxacin. The wound showed signs of healing, and so the treatment was continued.
This patient underwent inguinal hernia repair with mesh and developed swelling and discharge at the site after 5 weeks of repair. The pus sample was collected by wound exploration and culture showed same type of isolate as case 1.
A 60-year-old man gave history of discharge from inguinal hernia repair wound for 3 years after the repair. After wound exploration, the mesh was removed and along with pus was sent to the microbiology laboratory. Ziehl-Neelsen staining of the pus sample showed AFB with plenty of pus cells. The culture yielded RGM. The growth was identified as M. fortuitum on the basis of smear examination, growth on MA at room temperature and positive nitrate reduction test. This person also was treated with Clarithromycin and Ciprofloxacin and showed good response to treatment.
Identification of the isolates was confirmed by polymerase chain reaction (PCR) with primers TB11 and TB12 for hsp65 and RDRS and RDRA for rpoB (in-house developed kits by methodology adapted from Anilkumar et al. were used for PCR).
| Discussion|| |
The source of RGM can be water or soil.  Hospital-acquired infection may also occur from the materials used for the surgical procedures, and it is difficult to trace the source in sporadic cases because symptoms may be manifested after weeks or months of procedure as seen in the above patients. Hernia repair was done in different hospitals for these three patients and they were admitted here with the presenting symptoms. They were treated with different antibiotics without knowing the actual pathogen.
There are many reports on the antibiotic susceptibility testing and drug treatment of RGM infections with various antibiotics like Aminoglycosides, Erythromycin, Co-trimoxazole, Flouroquinolones, Clarithromycin, etc. ,,, Antituberculous drugs are not effective against these pathogens, and there are no specific guidelines on drug treatment. Our patients were treated with Ciprofloxacin and Clarithromycin and showed very good response.
The awareness about the infections of any type of implant by RGM is important, so that wound exploration and proper identification of the RGM can be done. An unknown isolate can be suspected to be RGM if growth of an acid-fast organism is observed after 2-4 days of incubation.  Proper guidance from the part of microbiologist may help the clinicians to give optimum treatment to the patient.
| Acknowledgement|| |
We thank Dr. Madhavilatha G. K., Rajiv Gandhi Centre for Biotechnology, Department of Biotechnology, Department of Science and Technology, Government of India, Thycaud, Thiruvananthapuram for help in identifying the isolates by PCR.
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[Figure 1], [Figure 2], [Figure 3]