Page 344 - TBE_Book_V2_2019

Chapter 12b: TBE in Mongolia

Overview of TBE in Mongolia

Table 1: Virus, vector, transmission of TBE in Mongolia
Viral subtypes, Far Eastern subtype isolated from fatal cases
distribution 7,15,16,17,18,19,20 Siberian subtype isolated from I. persulcatus
Reservoir animals Not documented
I. persulcatus (3.18±2.5%)
6,7
Infected tick species (%) Dermacentor silvarum (2.9±2.6%)
Dermacentor nuttalli (0.6%)
Dairy product
Not reported
transmission
Table 2: TBE reporting and vaccine prevention in Mongolia
Patients with clinical suspected TBE are reported to the National Center
for Zoonotic Diseases (NCZD) where the diagnosis can be
microbiologically confirmed (anti-TBEV-IgG and IgM by ELISA).
Mandatory TBE reporting
Any patient with serologically confirmed TBE or by PCR is reported to
the Center for Health Development and also to the Ministry of Health,
Mongolia. (http://hdc.gov.mn/)
National Center for Zoonotic Diseases and its local branches (15 Centers
Other TBE surveillance for zoonotic diseases in provinces) are conducting TBE surveillance in
ticks and in the population of endemic areas. 4,6,9,10,11
Clinically, 37.7% of patients have fever only, 34.6% suffer from
meningitis, 26.5% from meningoencephalitis and 1.2% from
encephalomyelitis. By age, fever dominates in age groups 0-9 and 40-49
years, meningitis in the age groups of 10-39 and 50-59 years and
Special clinical features 6,10,11
meningoencephalitis in those > 60 years.
The age group 20-49 years as well as „old men” are more frequently
6,7
affected. The overall CFR was 4.9% between 2005 and 2017 with an
annual range between 3.8-20%.

Available vaccines Russian vaccine - EnceVir and TBE-Moscow.
Persons in a risk population of most endemic provinces can receive TBE
vaccination free of personal charge.
Vaccination
Vaccination is also recommended for anybody living in or visiting known
recommendations and
endemic areas and a risk for tick bites.
reimbursement
(The Order A160 on 21 April 2017 approved by the Minister of Health
Annex 4: Guidelines for prevention and control of tick-borne diseases)
TBE vaccination is organized since 2005. As of 2017, 51,000 persons
Vaccine uptake by
from 13 provinces and the capital have been vaccinated, i.e. 2.1% of the
age group/risk group/
total population. Vaccine uptake in endemic provinces ranges between
general population 12,13,14
0.2% and -23%.
Name, address/ National Center for Zoonotic Diseases, Songinokhairkhan dictrict,
website of TBE NRC 20 khoroo, Ulaanbaatar, 18131, Mongolia (http://www.nczd.gov.mn)

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