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Volume 17, Number 5—May 2011

Research

Genotypic Profile of Streptococcus suis Serotype 2 and Clinical Features of Infection in Humans, Thailand

Anusak Kerdsin, Surang Dejsirilert, Parichart Puangpatra, Saowalak Sripakdee, Koranan Chumla, Nitsara Boonkerd, Pitimol Polwichai, Susumu Tanimura, Dan Takeuchi, Tatsuya Nakayama, Shota Nakamura, Yukihiro Akeda, Marcelo Gottschalk, Pathom Sawanpanyalert, and Kazunori OishiComments to Author 
Author affiliations: Author affiliations: Ministry of Public Health, Nonthaburi, Thailand (A. Kerdsin, S. Dejsirilert, P. Puangpatra, S. Sripakdee, K. Chumla, N. Boonkerd, P. Polwichai, P. Sawanpanyalert); Naresuan University Phayao Campus, Phayao, Thailand (N. Boonkerd); Hyogo College of Medicine, Nishinomiya, Japan (S. Tanimura); Osaka University, Osaka, Japan (D. Takeuchi, T. Nakayama, Y. Akeda, K. Oishi); Thailand-Japan Research Collaboration Center for Emerging and Re-emerging Infections, Nonthaburi (S. Nakamura); University of Montreal, Quebec, Canada (M. Gottschalk)

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Table 3

Demographic and clinical features of 158 human cases of Streptococcus suis serotype 2 infections, Thailand, January 2006–August 2008*

Characteristic All, n = 158 Fatal, n = 15; 9.5% Nonfatal, n = 143; 90.5% p value
Demographic
Male sex, % 72.8 66.7 73.4 0.386
Mean (median) age, y† 56.6 (55.0) 53.9 (52.5) 57.0 (56.0) 0.264
Period of admission, d, mean (median)
12.5 (11)
10.1 (6)
12.9 (12)
0.737
Meningitis category, no. (%) cases
Confirmed meningitis 22 (13.9) 1 (6.7) 21 (14.7) 0.348
Bacteremic meningitis 44 (27.8) 1 (6.7) 43 (30.1)‡ 0.043
Probable meningitis
27 (17.1)
6 (40.0)
21 (14.7)§
0.013
Nonmeningitis category, no. (%) cases
Septic arthritis 5 (3.2) 0 5 (3.2) 1
Infective endocarditis 3 (1.9) 1 (6.7) 2 (1.4) 0.905
Bacteremic pneumonia 1 (0.6) 0 1 (0.7) 1
Sepsis
56 (35.4)
6 (40.0)
50 (35.0)
0.698
Signs and symptoms, no. (%) cases
Diarrhea 28 (17.1) 5 (33.3) 23 (16.1) 0.1
Hearing loss 34 (21.5) 4 (26.7) 30 (21.0) 0.409
Altered consciousness 35 (22.2) 4 (26.7) 31 (21.7) 0.434
Shock
9 (5.7)
2 (13.3)
7 (4.9)
0.205
Possible risk factors, no. (%) cases
Recent consumption of raw pork products 52 (32.9) 5 (33.3) 47 (32.9) 0.589
Recent exposure to pigs 11 (7.0) 2 (13.3) 9 (6.3) 0.28
Alcohol abuse 33 (21.0) 5 (33.3) 28 (19.6) 0.178

*Statistical analyses were performed by using the χ2 or Fisher exact test.
†Ages were not available for 3 patients.
‡One case of bacteremic meningitis was associated with pneumonia.
§Two cases of probable meningitis were associated with spondylodiscitis.

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