Comparative Analysis of Severe Pediatric and Adult Leptospirosis in São Paulo, Brazil

Anne Spichler Health Municipality Secretariat of São Paulo, São Paulo, Brazil; Institute of Infectology Emilio Ribas, São Paulo, Brazil; Federal University of Bahia, Salvador, Bahia, Brazil; Division of Infectious Diseases, Departments of Medicine and Pediatrics, University of California, San Diego, La Jolla, California

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Daniel A. Athanazio Health Municipality Secretariat of São Paulo, São Paulo, Brazil; Institute of Infectology Emilio Ribas, São Paulo, Brazil; Federal University of Bahia, Salvador, Bahia, Brazil; Division of Infectious Diseases, Departments of Medicine and Pediatrics, University of California, San Diego, La Jolla, California

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Pedro Vilaça Health Municipality Secretariat of São Paulo, São Paulo, Brazil; Institute of Infectology Emilio Ribas, São Paulo, Brazil; Federal University of Bahia, Salvador, Bahia, Brazil; Division of Infectious Diseases, Departments of Medicine and Pediatrics, University of California, San Diego, La Jolla, California

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Antonio Seguro Health Municipality Secretariat of São Paulo, São Paulo, Brazil; Institute of Infectology Emilio Ribas, São Paulo, Brazil; Federal University of Bahia, Salvador, Bahia, Brazil; Division of Infectious Diseases, Departments of Medicine and Pediatrics, University of California, San Diego, La Jolla, California

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Joseph Vinetz Health Municipality Secretariat of São Paulo, São Paulo, Brazil; Institute of Infectology Emilio Ribas, São Paulo, Brazil; Federal University of Bahia, Salvador, Bahia, Brazil; Division of Infectious Diseases, Departments of Medicine and Pediatrics, University of California, San Diego, La Jolla, California

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John A. D. Leake Health Municipality Secretariat of São Paulo, São Paulo, Brazil; Institute of Infectology Emilio Ribas, São Paulo, Brazil; Federal University of Bahia, Salvador, Bahia, Brazil; Division of Infectious Diseases, Departments of Medicine and Pediatrics, University of California, San Diego, La Jolla, California

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Although leptospirosis may be fatal in childhood, the experience of many clinicians working in disease-endemic areas is that classic Weil's disease and death are less common among pediatric patients. The aim of the study was to ascertain disease spectrum and outcome differences in severe pediatric and adult leptospirosis in a large at-risk population. Epidemiologic, clinical, and laboratory data were obtained on hospitalized cases from São Paulo during 2004–2006. A total of 42 case-patients < 18 years of age and 328 case-patients ≥ 18 years of age were tested during the study. Compared with children, adults had higher rates of jaundice (P = 0.01), elevated serum bilirubin levels (P < 0.01), oliguria (P = 0.02), and elevated creatinine levels (P = 0.01) but not for thrombocytopenia or pulmonary involvement. The overall case-fatality rate was 27% (adult) versus 5% (pediatric) (P < 0.01). Severe pediatric leptospirosis may be less likely to show all classic features of Weil's disease and may be less fatal than in adults.

Author Notes

*Address correspondence to Anne Spichler, Division of Infectious Diseases, Department of Medicine, University of California, San Diego, 9500 Gilman Drive 0741, George Palade Laboratories Room 125, La Jolla, CA 92093-0741. E-mail: annespichler@gmail.com

Authors’ addresses: Anne Spichler and Antonio Seguro, Intensive Care Unit, Institute of Infectology, Emilio Ribas, São Paulo, Brazil, E-mails: annespichler@gmail.com and trulu@usp.br. Daniel A. Athanazio, Department of Biointeraction, Instituto de Ciências da Saúde–Universidade Federal da Bahia, Bahia, Brazil, E-mail: daa@ufba.br. Pedro Vilaça, Health Municipality Secretariat of São Paulo, São Paulo, Brazil, E-mail: pvilaca@uol.br. Joseph Vinetz, Division of Infectious Diseases, Department of Medicine, University of California, San Diego, La Jolla, CA, E-mail: jvinetz@ucsd.edu. John A. D. Leake, Division of Infectious Diseases, Rady Children's Hospital, San Diego, CA, E-mail: jleake@rchsd.org.

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