Necrotizing fasciitis caused by group A Streptococcus with no apparent predisposing factors presenting as acute abdomen

Necrotizing fasciitis caused by group A Streptococcus with no apparent predisposing factors presenting as acute abdomen

International Journal of Infectious Diseases (2008) 12, 332—344 http://intl.elsevierhealth.com/journals/ijid CORRESPONDENCE Necrotizing fasciitis ca...

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International Journal of Infectious Diseases (2008) 12, 332—344

http://intl.elsevierhealth.com/journals/ijid

CORRESPONDENCE Necrotizing fasciitis caused by group A Streptococcus with no apparent predisposing factors presenting as acute abdomen Necrotizing fasciitis of the abdomen is an uncommon, acute surgical emergency that requires a high index of suspicion and immediate intervention with intravenous antibiotics and surgical debridement. Most cases have a predisposing factor, mainly penetrating or blunt trauma. A previously healthy, 27-year-old female was admitted with a 3-day history of progressive, dull aching right lower quadrant (RLQ) abdominal pain, radiating to the umbilical and inguinal regions and down to the right thigh. It initially occurred with ambulation, but later her pain progressed to a non-remitting pain. The patient had nausea, vomiting, malaise, fever, and chills. Her past surgical history was significant for a remote appendectomy, ovarian cystectomy 2 years previously, and bilateral tubal ligation 9 months previously. Physical examination showed the patient in severe pain. She was pale, hypotensive, tachypneic, and tachycardic with a temperature of 39 8C. A chest examination showed bilaterally diminished air entry at both bases. Cardiac examination showed tachycardia. Abdominal examination showed mild erythema of the skin in the RLQ, hypoactive bowel sounds, and marked tenderness to palpation in the RLQ and inguinal area with rigidity and rebound tenderness. Bimanual examination showed a moderate cheesy vaginal discharge, no cervical motion tenderness, and no palpable masses. Rectal examination was unremarkable. The right lower extremity examination showed calf and thigh swelling, with tenderness and erythema, with no crepitus, fluctuance, or purplish discoloration. Laboratory data showed a white blood cell (WBC) count of 14.9  109/l (72% neutrophils, 4% lymphocytes, and 21% band forms), hemoglobin of 90 g/l, hematocrit of 28%, and a platelet count of 126  109/l. Serum sodium was 129 mmol/l, blood urea nitrogen was 20 mg/dl, and creatinine was 1.7 mg/dl. Her hepatic profile showed an aspartate aminotransferase level ranging between 16 and 52 IU/l. The prothrombin time was 16.1 s with an international normalized ratio (INR) of 2.02. The activated partial thromboplastin time was 39.6 s. Testing for serum b-human chorionic gonadotropin was negative. Blood cultures were negative. Her urinalysis showed 5—10 WBC/high-power field (HPF), but no bacteria. Transvaginal ultrasound showed no pathology.

A magnetic resonance imaging (MRI) of the pelvis was done (Figure 1). The patient was diagnosed, based on the MRI findings, with necrotizing fasciitis and muscle necrosis involving the pelvis, retroperitoneum, and upper thigh. This was confirmed at laparotomy and right thigh exploration. The muscles involved were the sartorius, psoas, external oblique, internal oblique, transversus abdominis, rectus abdominis, and quadriceps femoris. No intra-abdominal or intrapelvic visceral involvement was seen. She was treated with intravenous piperacillin/tazobactam, vancomycin, and clindamycin with extensive tissue debridement, including the muscles and fascia involved. Myoflaps were used. A repeat surgical debridement was done at 2 and 3 weeks and the abdominal wound was allowed to heal using vacuum assisted closure. Tissue culture grew group A Streptococcus. The absence of conjunctivitis, strawberry tongue, typical rash, and the finding of negative blood cultures made a diagnosis of toxic shock syndrome unlikely, although the patient had some criteria of toxic shock syndrome such as renal failure, hypotension, vomiting, diarrhea, and rapid onset fever. Despite this, the patient was given fresh frozen plasma. Intravenous g-globulin was not administered. During her hospital course, the patient underwent an extensive rehabilitation program. Necrotizing fasciitis is an acute surgical emergency requiring both a high index of suspicion for diagnosis and prompt operative intervention.1 To the best of our knowledge, this case is among the first few cases to describe such an extensive necrosis of muscle and fascia in a patient with no apparent predisposing factors.2 Predisposing factors for necrotizing fasciitis include, but are not limited to: history of trauma, surgical interventions such as liposuction,3 displaced gastrostomy tubes,4 perforated diverticular disease,5 fistulizing Crohn’s disease,6 colon cancer perforation, diabetes mellitus,1 Amyand’s hernia,7 empyema,8 insecticide injection,9 varicella infection,10 following cesarean section,11 in AIDS patients,12 acute appendicitis,13 and following gallbladder perforation and laparoscopic cholecystectomy.14,15 In children, omphalitis and necrotizing enterocolitis are predisposing factors.16,17 In our case, initial diagnosis was delayed because of the inflammatory process in the lower extremity, absence of significant skin erythema, and tissue crepitus, and this is a major point to learn from, which is that any pelvic pathology can extend to the lower extremity through the obturator foramen and make the presentation of an acute abdomen

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Figure 1 MRI of the pelvis showing pelvic fascial fluid and edema with a hyperintense signal of the fascia surrounding the muscles in the pelvis, suggestive of myofasciitis.

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hard to initially evaluate and treat. Necrotizing fasciitis should be considered in the differential diagnosis of severe abdominal pain. Conflict of interest: No conflict of interest to declare.

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Septicemia caused by Corynebacterium macginleyi: a rare form of extraocular infection Non-diphtheria Corynebacterium species have emerged as nosocomial pathogens and cause diseases in risk populations, such as the immunocompromised and patients with indwelling medical devices.1 Recognized cases of bacteremia with non-diphtheria Corynebacterium spp have become more prevalent.1 We report herein the first case of Corynebacterium

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Hamed A. Shabaneh Al-Tamimi* Lee Thomas Department of Internal Medicine, Division of Gastroenterology, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, Texas 79430, USA *Corresponding author. Tel.: +1 806 743 3155; fax: +1 806 743 3148 E-mail address: [email protected] (H.A.S. Al-Tamimi) Corresponding Editor: James Muller, Pietermaritzburg, South Africa 29 May 2007 doi:10.1016/j.ijid.2007.08.004

macginleyi septicemia in an immunocompromised adult patient, which resulted in death. A 73-year old male was hospitalized with headaches, disorientation, instability, and vomiting. The patient had previously been diagnosed with non-Hodgkin lymphoma, hypertension, and type 2 diabetes mellitus. Physical examination showed partial disorientation and globally diminished osteomuscular reflexes. The patient had no motor or sensory deficits and had no signs of meningococcal irritation.