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Volume 32, Number 5—May 2026

Dispatch

Yezo Virus Diversity in Tick Bite Patients and Ticks, Russia

Yulia O. EpikComments to Author , Kseniia A. Sycheva, Lyudmila S. Karan, Evgenia V. Mokretsova, Anna G. Dragomeretskaya, Olga E. Trotsenko, Anna R. Efimova, Yulia M. Spirina, Olga M. Drozdova, Tatyana E. Bondarenko, Ekaterina A. Blinova, Vasiliy G. Akimkin, and Evgeny S. Morozkin
Author affiliation: Central Research Institute of Epidemiology, Moscow, Russia (Y.O. Epik, K.A Sycheva, E.A. Blinova, V.G. Akimkin, E.S. Morozkin); Russian Сenter of Neurology and Neurosciences, Moscow (L.S. Karan); Far Eastern State Medical University, Khabarovsk, Russia (E.V. Mokretsova); Khabarovsk Research Institute of Epidemiology and Microbiology, Khabarovsk (E.V. Mokretsova, A.G. Dragomeretskaya, O.E. Trotsenko), Centre of Hygiene and Epidemiology in the Kemerovo region–Kuzbass, Kemerovo, Russia (A.R. Efimova, Y.M. Spirina); Kemerovo State Medical University, Kemerovo (O.M. Drozdova); Kuzbass Clinical Infectious Diseases Hospital, Kemerovo (T.E. Bondarenko).

Main Article

Table 1

Characteristics of 2 Yezo virus–infected patients with history of tick bites from Khabarovsk and Kemerovo regions, Russia

Epidemiologic characteristics Patient 1 Patient 2
Age, y 68 69
Sex F M
Geographic region
 Khabarovsk
 Kemerovo
Days from tick bite to symptom onset 5 3
Days from symptom onset to hospital admission
 2
 0
Tick bite identification method
 Self-reported
 Self-reported
Clinical manifestations
Fever Yes Yes
Headache Yes No
Malaise Yes Yes
Nausea Yes No
Myalgia Yes Yes
Lumbago Yes No
Rash No No
Meningeal symptoms No No
Bacterial co-infection
 Yes
 No
Tickborne pathogen detection
Tickborne encephalitis virus No No
Borrelia spp. No No
Anaplasma spp. No No
Ehrlichia chaffeensis No No
Ehrlichia muris No No
Rickettsia heilongjiangensis Yes No
Yezo virus Yes Yes

Main Article

Page created: March 31, 2026
Page updated: May 07, 2026
Page reviewed: May 07, 2026
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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