Volume 14, Number 3—March 2008
Dispatch
Leptospirosis-associated Severe Pulmonary Hemorrhagic Syndrome, Salvador, Brazil
Table 1
Characteristics of leptospirosis patients identified during active surveillance in metropolitan Salvador, Brazil, from 2003 through 2005, according to presence of SPHS
Characteristics | With SPHS |
Without SPHS |
p value* | |||
---|---|---|---|---|---|---|
No. responses | No. (%) or mean ± SD | No. responses | No. (%) or mean ± SD | |||
Age, y | 44 | 37.6 ± 19.4 | 427 | 34.9 ± 14.5 | 0.57 | |
Female sex |
47 |
14 (30) |
427 |
55 (13) |
0.002 |
|
Clinical manifestations | ||||||
Days of symptoms before hospitalization | 43 | 6.3 ± 3.6 | 419 | 6.1 ± 2.8 | 0.70 | |
Respiratory insufficiency† | 47 | 20 (42) | 427 | 73 (17) | 0.001 | |
Hemoptysis | 47 | 7 (15) | 427 | 27 (6) | 0.03 | |
Jaundice | 47 | 40 (85) | 427 | 363 (85) | 0.99 | |
Total serum bilirubin, mg/dL | 22 | 17.8 ± 13.4 | 140 | 13.9 ± 10.3 | 0.22 | |
Oliguria | 47 | 22 (47) | 427 | 106 (25) | 0.001 | |
Blood urea nitrogen, mg/dL | 33 | 121 ± 78 | 254 | 128 ± 79 | 0.60 | |
Serum creatinine, mg/dL | 33 | 3.9 ± 2.3 | 254 | 3.8 ± 2.7 | 0.64 | |
Hypotension‡ | 42 | 12 (28) | 387 | 85 (22) | 0.33 | |
Leukocyte count, 103 cells/mm3 | 45 | 15.3 ± 8.0 | 422 | 14.4 ± 6.5 | 0.71 | |
Hematocrit, % | 23 | 31.8 ± 7.1 | 135 | 33.6 ± 6.1 | 0.11 | |
Thrombocytopenia§ |
21 |
6 (29) |
120 |
32 (27) |
0.86 |
|
Therapeutic interventions | ||||||
Dialysis | 47 | 25 (53) | 425 | 89 (21) | 0.001 | |
Packed erythrocyte transfusion | 47 | 28 (60) | 424 | 42 (10) | 0.001 | |
Intensive care unit admission |
47 |
44 (94) |
424 |
112 (26) |
0.001 |
|
Hospital outcome | ||||||
Death | 47 | 35 (74) | 427 | 49 (12) | 0.001 | |
Days of hospitalization for patients who died | 35 | 3.2 ± 2.5 | 49 | 4.8 ± 5.9 | 0.91 | |
Days of hospitalization for survivors |
12 |
20.8 ± 15.0 |
378 |
9.1 ± 8.4 |
0.02 |
|
Confirmed case¶ | 47 | 37 (79) | 427 | 351 (82) | 0.56 | |
Serovar Copenhageni as the presumptive infecting agent# | 23 | 22 (96) | 316 | 285 (90) | 0.71 |
*The χ2 and Student t tests were used to evaluate for significant differences (p value <0.05) for proportions and continuous data, respectively. SPHS, severe pulmonary hemorrhagic syndrome; SD, standard deviation.
†Respiratory rate >30 per min or use of supplemental oxygen therapy.
‡Systolic arterial blood pressure <90 mm Hg or use of vasoactive drugs.
§Platelet count <50,000 cells/mm3.
¶The microscopic agglutination test (MAT) and immunoglobulin M ELISA were used for laboratory confirmation.
#Proportions are shown for patients who had an MAT-confirmed diagnosis of leptospirosis and highest agglutination titers against Leptospirosis interrogans serovar Copenhageni.