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Volume 32, Number 10—October 2026

Research Letter

Haemophilus ducreyi Bacteria Causing Cutaneous Ulcer Outbreak in Children, Sierra Leone, December 2025

Jianxu Zhang1, Peng Lv1, Teng Zhao, Hanji Jiang, James S. Squire, Martin S. Yonnie, Zikan Koroma, Ibrahim F. Kamara, Abdulai A. Jalloh, Guangqian Pei, Yunfei Wang, Hongling Liu, Mohamed B. JallohComments to Author , and Zhiqiang MiComments to Author 
Author affiliation: Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China (J. Zhang); National Key Laboratory of Advanced Biotechnology, Academy of Military Medical Sciences, Beijing, China (P. Lv); State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Sciences, Beijing (T. Zhao, H. Jiang, G. Pei, Y. Wang, Z. Mi); University of Sierra Leone, Freetown, Sierra Leone (J.S. Squire); National Public Health Agency, Freetown (J.S. Squire, Z. Koroma, A.A. Jalloh, M.B. Jalloh); Ministry of Health, Bombali DHMT, Makeni, Sierra Leone (M.S. Yonnie); World Health Organization, Health Systems and Services Cluster, Freetown (I.F. Kamara); The Fifth Medical Center of Chinese PLA General Hospital, Beijing (H. Liu); College of Medicine and Allied Health Sciences, University of Sierra Leone, Freetown (M.B. Jalloh)

Main Article

Figure 1

Irregular appearance of cutaneous ulcer lesions from patients in study of Haemophilus ducreyi bacteria causing cutaneous ulcer outbreak in children, Sierra Leone, December 2025. A) Lesions over the knee. B) Lesions below the knee. C) Lesions on the mid-lateral aspect of the leg. D) Lesions at the ankle.

Figure 1. Irregular appearance of cutaneous ulcer lesions from patients in study of Haemophilus ducreyi bacteria causing cutaneous ulcer outbreak in children, Sierra Leone, December 2025. A) Lesions over the knee. B) Lesions below the knee. C) Lesions on the mid-lateral aspect of the leg. D) Lesions at the ankle.

Main Article

1These authors contributed equally to this article.

Page created: September 21, 2026
Page updated: September 21, 2026
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