Streptococcus suis-Associated Meningitis in a Southern Region of Vietnam

Nguyen Huu Thanh School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam;

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Doan Thanh Huy School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam;

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Vo Thi Tram Anh School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam;

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Nguyen Ngoc Anh School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam;

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Nguyen Thi Thu Uyen School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam;

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Nguyen Ho Hong Hanh School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam;
Department of Infectious Disease, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam

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Nguyen Hoan Phu School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam;
Department of Infectious Disease, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam

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ABSTRACT.

Streptococcus suis is the most common and severe cause of meningitis in Vietnam, but the recent data about epidemiological characteristics and sequelae are still inadequate. We performed a retrospective study to describe the epidemiology, clinical characteristics, and outcomes of patients with S. suis-associated meningitis. A retrospective study was carried out by searching records from the Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam, between January 2016 and January 2020. All data concerning epidemiological, clinical, and subclinical characteristics and treatment results were collected and analyzed. Over the study period, 153 cases were included in this study, with 95 cases occurring in the 2016–2017 period. The median age of all patients was 52 years (range, 29–90 years), and 70.6% of patients were male. Fifty-two patients (34%) were farmers, and the Mekong Delta was the region with the highest number of cases (60.1%). The most frequent manifestation of infection was fever (151/153, 98.7%), followed by hearing loss (64/153, 41.8%), and one patient (0.7%) died. All isolates remained susceptible to ceftriaxone, penicillin, vancomycin, and levofloxacin, whereas 99.2% of isolates were resistant to tetracycline. Occupational exposure to pigs and the consumption of contaminated food have been identified as primary risk factors associated with this zoonosis, and our study found no significant changes in epidemiological factors compared with past data. The Mekong Delta continues to be the most affected region for S. suis meningitis in southern Vietnam, with S. suis serotype 2 remaining the most relevant agent.

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Author Notes

Financial support: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Disclosure: This study was approved by the Ethics Committee of the School of Medicine, Vietnam National University - Ho Chi Minh City, Vietnam.

Current contact information: Nguyen Huu Thanh, College of Health Sciences, VinUniversity, Hanoi, Vietnam, E-mail: nhthanh.dr1@gmail.com. Doan Thanh Huy, Vo Thi Tram Anh, Nguyen Ngoc Anh, and Nguyen Thi Thu Uyen, School of Medicine, Vietnam National University, Ho Chi Minh City, Vietnam, E-mails: dthuy.stu14@medvnu.edu.vn, vttanh.stu14@medvnu.edu.vn, nnanh.stu14@medvnu.edu.vn, and nttuyen2.stu14@medvnu.edu.vn. Nguyen Ho Hong Hanh and Nguyen Hoan Phu, University of Health Sciences, Vietnam National University, Ho Chi Minh City, Vietnam and Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam, E-mails: phunh@oucru.org and honghanh.nguyenho@gmail.com.

Address correspondence to Nguyen Hoan Phu, Hospital for Tropical Diseases, 764 Vo Van Kiet, Ho Chi Minh City, Vietnam. E-mail: phunh@oucru.org
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