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The efficacy and adverse effects of prophylactic administration of Sulfamethoxazole-Trimethoprim (ST) for Pneumocystis carinii Pneumonia (PCP) were assessed in patients with connective tissue diseases (CTD) Eightly four patients who were receiving more than 40mg/day of prednisolone were entried in the present study. Patients with at least one of the two PCP risk factors (interstitial pulmonary fibrosis and lymphopenia) , were administred either one (11 patients) or two (26 patients) ST tablets/day. The remaining 47 patients who did not receive ST served as the controls. Although PCP was detected in 4.3% of the patients in the no-ST group, none of the patients who received ST developed PCP. Five of these 26 patients who received two tablets of ST/day, experienced adverse reactions. However, no adverse reactions were detected in the patients who received one tablet of ST/day (p<0.05). Abnormal laboratory data were obtained for 10 (38.5%) of the patients who received two tablets of ST/day and for 4 (36.4%) of the 11 patients who received one tablet of ST/day. The results of the present study suggest that the prophylactic administration of one tablets of ST in patients with CTD that have at least one of the two PCP risk factors is effective in preventing PCP.

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We experienced a SLE patient with TSS after delivery. A 32-year-old SLE patient was transferred to our division due to fever, diarrhea, erosive rash, pericardial effusion, myalgia, low blood pressure, thrombocytopenia and hypoproteinemia which appeared two days after transvaginal delivery. At the time of admission, we considered these symptoms as the exacerbation of SLE, and treatment with high doses of steroid was started. It was when TSST-1-producing-MRSA was cultured from the vagina and uterus that TSS was suspected. 2 g/day of vancomycin was administered and her symptoms improved. As observed in this case, it is important to consider TSS as one of the complications seen with SLE patients after delivery.