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Toxic shock syndrome

Toxic shock syndrome (TSS) is a rare but potentially fatal disease caused by a bacterial toxin. Different bacterial toxins may cause toxic shock syndrome, depending on the situation. The causative agent is Staphylococcus aureus. A similar condition, therefore called Toxic Shock Like Syndrome (TSLS), is the result of Streptococcus pyogenes infection more...

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The route of infection is usually through the skin (pricking accident, surgery, burns), vagina (tampon, partus) or pharynx.

The number of reported toxic shock syndrome cases has decreased significantly in recent years. Approximately half the cases of TSS reported today are associated with tampon use during menstruation, usually in young women, though TSS also occurs in children, men, and non-menstruating women. In the US in 1997 only five confirmed menstrually-related TSS cases were reported, compared with 814 cases in 1980, according to data from the Centers for Disease Control and Prevention (CDC).

Although scientists have recognized an association between TSS and tampon use, no firm causal link has been established. Research conducted by the CDC suggested that use of some high absorbency tampons increased the risk of TSS in menstruating women. A few specific tampon designs and high absorbency tampon materials were also found to have some association with increased risk of TSS. These products and materials are no longer used in tampons sold in the U.S. Tampons made with rayon do not appear to have a higher risk of TSS than cotton tampons of similar absorbency.

Vaginal dryness and ulcerations may occur when women use tampons more absorbent than needed for the amount of their menstrual flow. Ulcerations have also been reported in women using tampons between menstrual periods to try to control excessive vaginal discharge or abnormal bleeding. Women may avoid problems by choosing a tampon with the minimum absorbency needed to control menstrual flow and using tampons only during active menstruation. Alternately, women may use a silicone menstrual cup to avoid the negative side-effects of tampons.

Symptoms and diagnosis

Symptoms of toxic shock syndrome in the early phase can be hard to recognize because they mimic the flu. They include sudden high fever, muscle aches, joint pain, vomiting, diarrhea, dizziness, fainting, or a rash that looks like a sunburn. One or two weeks after initial symptoms begin, flaking and peeling of the skin occurs, mainly on the palms and soles.

The fulminant course rapidly changes general symptoms to fever, systolic blood pressure under 90 mmHg, altered state of mind. In other words, septic shock.

Therapy

Women wearing a tampon at the onset of symptoms should remove it immediately. The severity of this disease results in hospitalisation for treatment. Antibiotic treatment consists of Penicilline and Clindamycin.

Extreme infection of the skin and deeper parts is called Fasciitis necroticans, (one of the symptoms), and should be attacked surgically without delay.

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Early and definitive diagnosis of toxic shock syndrome by detection of marked expansion of T-cell-receptor V[beta]2-positive T cells - Dispatches
From Emerging Infectious Diseases, 3/1/03 by Yoshio Matsuda

We describe two cases of early toxic shock syndrome, caused by the superantigen produced from methicillin-resistant Staphylococcus aureus and diagnosed on the basis of an expansion of T-cell-receptor V[beta]2-positive T cells. One case-patient showed atypical symptoms. Our results indicate that diagnostic systems incorporating laboratory techniques are essential for rapid, definitive diagnosis of toxic shock syndrome.

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Toxic shock syndrome (TSS) is a severe illness caused by methicillin-resistant Staphylococcus aureus (MRSA) infection, usually during menstruation but also in the postpartum period. S. aureus produces several superantigenic exotoxins, including TSS toxin-1 (TSST-1), which activate a vast number of T cells in a T-cell-receptor V[beta]-selective manner (1,2). Cytokines produced by T cells and activated by TSST-1 are thought to cause the abnormal changes of TSS (1,2). Polymerase chain reaction (PCR) analysis of peripheral blood T cells from adults with TSS has shown a protracted expansion of TSST-1-reactive V[beta]2-positive T cells persisting for 4-5 weeks (3). TSS in neonates, referred to as neonatal TSS-like exanthematous disease, has been shown by flow cytometric analysis to involve an expansion of T-cell-receptor V[beta]2-positive T cells (4,5).

Because many cases do not satisfy the strict diagnostic criteria for TSS proposed by the Centers for Disease Control and Prevention (6), revised clinical diagnostic criteria for TSS, including probable cases, have been proposed (Table) (7). In Japan, several clinicians have described a TSS-like clinical entity that could not be diagnosed as TSS even according to the revised criteria.

We report two cases of TSS with puerperal infection that could be diagnosed at the early stage of the clinical course by detecting a marked expansion of T-cell-receptor V[beta]2-positive T cells, as measured by flow cytometric analysis. The symptoms of one patient were too complex to permit diagnosis according to the clinical criteria without evaluation of the TSST-1-reactive T cells. We discuss the role of T-cell analysis in peripheral blood mononuclear cells in the diagnosis of TSS.

Case Reports

Case 1

A 29-year-old Japanese woman underwent a cesarean section at a private clinic after premature membrane rupture. On postpartum day 3, shock with hypotension (67/37 mmHg) developed. No rash occurred during this period. She was transferred to the Maternal and Perinatal Center, Tokyo Women's Medical University Hospital.

On admission, the patient was awake and alert, but her face was pale. Her body temperature was 37[degrees]C, blood pressure was 104/80 mmHg, heart rate was 140 bpm, and respiratory rate was 28 times/min. A pelvic examination showed a brownish discharge from the cervix. The uterus was approximately 10 x 10 cm in diameter, with no tenderness. Her systolic blood pressure subsequently decreased to 80 mmHg, respiratory rate increased to 44 times/min, and body temperature rose to 39[degrees]C. Mild hypoxemia (p[O.sub.2] = 65 mmHg while breathing room air) became apparent, and the cardiothoracic rate shown on a chest x-ray film had increased to 54%. To treat shock, dopamine and fresh frozen plasma were administered with antithrombin III and antibiotic therapy (initially, pentocillin 2 g/day + panipenem/betamipron 1 g/day + amikacin 100 mg/day, and subsequently, panipenem/betamipron 1 g/day + vancomycin 1 g/day). The results of laboratory tests led to a suspected diagnosis of septic shock with disseminated intravascular coagulopathy (Table). Therefore, ulinastatin and gabexate mesilate, which possess both antifibrinolytic and anticoagulative effects, were administered (8,9). Because the patient's general condition did not improve, she was admitted to the intensive care unit.

On day 3 after admission to the intensive care unit, an abscess was observed around the surgical wound. Bacteriologic tests showed that the vaginal discharge was positive for MRSA, and a preliminary diagnosis of TSS was made. Peripheral blood mononuclear cells were stained with antibodies to CD3, CD4, CD8, and T-cell-receptor-V[beta]2 elements and examined for the percentage of V[beta]2-positive T cells by a flow cytometer as described (4,5). Five hours after staining, a marked expansion of V[beta]2-positive-T cells, unrelated to the CD4:CD8 ratio, was confirmed (Figure), indicating the definitive diagnosis of TSS in the early clinical course. Rash and desquamation, important clinical symptoms of TSS, did not develop. On day 7 after admission, the patient was discharged from the intensive care unit and entered the general ward. On day 17, intrapelvic abscess was incised and drained. Subsequently, her general condition improved. The percentage of V[beta]2-positive-T cells decreased gradually over the course of 5 weeks (Figure). She has no long-term sequelae. MRSA isolated from this patient was later confirmed to be positive for TSST-1.

[FIGURE OMITTED]

Case 2

A previously healthy 33-year-old Japanese woman had a fever (38.4[degrees]C) 1 week after an uncomplicated spontaneous vaginal delivery without episiotomy at a private clinic. She was transferred to Tokyo Women's Medical University Hospital. On admission, the patient was awake and alert. Her body temperature was 38.8[degrees]C, blood pressure was 80/52 mmHg, heart rate was 127 bpm, and respiratory rate was 28 times/min.

A diffuse erythematous rash was present on the chest. It spread to the face and extremities and resolved after 8 days. A pelvic examination disclosed a brownish discharge from the cervix. The uterus was approximately 6 cmx 8 cm in diameter, with no tenderness. The laboratory test results and clinical symptoms suggested a diagnosis of TSS (Table). To treat the hypotension, dopamine and fresh frozen plasma were administered. The patient also received antithrombin III, ulinastatin, and gabexate mesilate as well as antibiotics (initially, imipenem/cilastatin 2 g/day + amikacin 200 mg/day, and subsequently, vancomycin 2 g/day).

One day after admission, bacteriologic tests showed that the vaginal discharge and breast milk were positive for MRSA. On day 5 after admission, peripheral blood mononuclear cells were examined for expansion of V[beta]2 T cells. A marked expansion of V[beta]2 T cells was confirmed (Figure), indicating the definitive diagnosis of TSS. The V[beta]2-positive T cells gradually diminished to normal levels. Desquamation of the extremities occurred on day 11 after admission. From day 3 after admission, the patient's general condition improved gradually, and she was discharged on day 14. She had no long-term sequelae. Isolates of MRSA isolated were later found to be TSST-1-positive.

Discussion

Puerperal infection is a major cause of maternal death. Postpartum nonmenstrual TSS has received attention as a potential cause of puerperal infection (10-12). Knowing the incidence of MRSA infections in medical institutions would be helpful. For example, Fujino et al. reported that 246 MRSA isolates were obtained from 74 inpatients in December 2000 in a Tokyo hospital with 27 wards and 925 beds (13). During the past 4 years, no TSS cases have occurred in our department of obstetrics and gynecology. The two patients in this report were transferred from a private clinic. Although the incidence of TSS is rare in our department, we are concerned that the incidence is not rare in small private clinics. Our two cases may provide important clues to the actual incidence of TSS in women with puerperal infection.

In both of our patients, the diagnosis of TSS was confirmed during acute illness on the basis of expansion of TSS-1-reactive V[beta]2 T cells in peripheral blood mononuclear cells. Diagnosis solely on the basis of clinical symptoms was not possible in case 1 because of the absence of skin rash and desquamation, cardinal symptoms of TSS, and the presence of signs of severe multiple organ failure. In case 2, diagnosis of TSS was straightforward because of typical clinical symptoms. The severe multiple organ failure in case 1 may have suppressed the development of skin reactions. Our report strongly suggests that some TSS cases that cannot be correctly diagnosed because of a complicated clinical picture. Our results indicate that diagnostic systems incorporating laboratory techniques are essential for the rapid, definitive diagnosis of TSS.

Our experience suggests the necessity for better estimates of the incidence of postpartum staphylococcal infections, TSS associated with MRSA, and TSS that does not satisfy generally accepted diagnostic criteria. Several clinical trials in fields other than obstetrical infections with MRSA are now underway in Japan to address these issues.

References

(1.) Kotzin B, Leung DYM, Kappler J, Marrack P. Superantigens and their potential role in human disease. Adv Immunol 1993;54:99-166.

(2.) Uchiyama T, Yan X-J, Imanishi K, Yagi J. Bacterial superantigens--mechanism of T-cell activation by the superantigens and their role in the pathogenesis of infectious disease. Microbiol Immunol 1994;38:245-56.

(3.) Choi Y, Lafferty JA, Clements JR, Todd JK, Gelfand EW, Kappler J, et al. Selective expansion of T cells expressing V[beta]2 in toxic shock syndrome. J Exp Med 1990;172:981-4.

(4.) Takahashi N, Nishida H, Karo H, Imanishi K, Sakata Y, Uchiyama T. Exanthematous disease induced by toxic shock syndrome toxin I in the early neonatal period. Lancet 1998;351:1614-9.

(5.) Takahashi N, Kato H, Imanishi K, Miwa K, Yamanami S, Nishia H, et al. Immunopathological aspects of an emerging neonatal infectious disease induced by a bacterial superantigen. J Clin Invest 2000;106:1409-15.

(6.) Toxic-shock syndrome--United States. MMWR Morbid Mortal Wkly Rep 1980;29:229-30.

(7.) Tofte RW, Williams DN. Toxic shock syndrome. Evidence of a broad clinical spectrum. JAMA 1981;246:2163-7.

(8.) Endo S, Inada K, Taki K, Hoshi S, Yoshida M. Inhibitory effects of ulinastatin on the production of cytokines: implications for the prevention of septicemic shock. Clin Ther 1990;12:323-6.

(9.) Terasato K. Amniotic fluid embolism. Journal of Anesthesia 2001;15:238.

(10.) Davis D, Gash-Kim TL, Heffernan EJ. Toxic shock syndrome: case report of a postpartum female and a literature review. J Emerg Med 1998;16:607-14.

(11.) Shands KN, Schmid GP, Dan BB, Blum D, Guidotti RJ, Hargrett NT. Toxic shock syndrome in menstruating women: association with tampon use and Staphylococcus aureus and clinical features in 52 cases. N Engl J Med 1980;303:1436-42.

(12.) Bracero L, Bowe E. Postpartum toxic shock syndrome. Am J Obstet Gynecol 1982;143:478-9.

(13.) Fujino T, Mori N, Kawana A, Kawabata H, Kuratsuji T, Kudo K, et al. Molecular epidemiology of methicillin-resistant Staphylococcus aureus in a Tokyo hospital in 2000. Jpn J Infect Dis 2001;54:91-3.

Address for correspondence: Yoshio Matsuda, Department of Obstetrics and Gynecology, Tokyo Women's Medical University, Kawada-cho, 8-1, Shinjukuku, Tokyo 162-8666, Japan; fax: 81-3-5269-7350; e-mail: ymatsuda@ obgy.twmu.ac.jp

Yoshio Matsuda, * Hidehito Kato, * Ritsuko Yamada, * Hiroya Okano, * Hiroaki Ohta, * Ken'ichi Imanishi, * Ken Kikuchi, * Kyouichi Totsuka, * and Takehiko Uchiyama *

* Tokyo Women's Medical University School of Medicine, Tokyo, Japan

Dr. Mastuda is associate professor for Maternal & Perinatal Center, Maternal Division, Department of Obstetrics and Gynecology, Tokyo Women's Medical University. He is interested in perinatology.

COPYRIGHT 2003 U.S. National Center for Infectious Diseases
COPYRIGHT 2003 Gale Group

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