Results of tick-borne encephalitis vaccination / Монголын Анагаах Ухаан

Objective: To evaluate efficacy of vaccination against tick-born encephalitis by determination of specific antibody titer. Materials and Methods. 224 vaccinated residents (77 females, 147 males) of Selenge aimag with mean age of 33.1(6- 60), 20 worker of Ulaanbaatar with mean age of 36 (23-53) were enrolled to the study. We used Avidity determination of antibodies againt TBE Virus ELISA (Ig G) manufactured by the EUROIMMUN.Result:At 2-6 months after first dose RAI% was in low (29.4-32%), at 1 month after second dose RAI% was in equivocal (53.9%-55.6%), at 6 months after third vaccination RAI% was in high (72.5%-79.8%) avidity antibodies in two groups. That mean RAI% is increasing depend from repetition doses in both schedule. These differences were statistically significant for all post vaccination evaluation days (60,90; p0.05) level of RAI% in 6 months after second dose with compared two schedule. But it getting high level of RAI% was developed in short time (before 90 days) with the accelerated schedule than conventional schedule.Antibody titer of 2-200 RU/ ml were observed in all attendants of Selenge aimag. But only 34% of them show a protective titer. In details 62.8% of people vaccinated in 2002-2004, 55.8% of people vaccinated in 2005-2007 and 50.2% of people vaccinated in 2007-2009 year have demonstrated a protective titer. Only 21.7% and 13.4% of people vaccinated by rapid scheme and people received only first dose, respectively, have a protective immunity against TBE.Conclusion:1. The level of RAI% is increasing depends from repetition doses of vaccine TBE with accelerated and conventional schedule.2. The high level of RAI% is getting at 6 months after second dose with accelerated and conventional schedule.3. Complete dose of TBE vaccine develop a better action for establishment of specific protective immunity.

Animal and human rabies in Mongolia.

The prevalence of animal rabies differs in each area of Mongolia. Wolves (Canis lupus Linnaeus, 1758), foxes ( Vulpes vulpes Linnaeus, 1758), corsac foxes (Vulpes corsac Linnaeus, 1768) and manuls (Felis manul Pallas, 1778) are considered to be the infective wild animals in natural foci. Amongst livestock, cattle have had the most rabies cases, followed by camels, sheep, goats and horses. The peak prevalence of animal rabies occurred in the 1970s. Dundgovi Province had the highest incidence during that period. The number of rabies cases in animals decreased during the 1980s. This may have been due to a decrease in the number of wild reservoir animals and the improvement of appropriate veterinary measures. In recent years, animal rabies has prevailed in the Khangai and western provinces. The infection source of most human rabies cases is the dog. In order to minimise the incidence of human rabies, canine vaccination programmes need to be improved. This paper describes the epizootiology and epidemiology of animal and human rabies in Mongolia. It describes rabies control programmes, including diagnosis, conducted in Mongolia in an effort to control the disease.

Anthrax in animals and humans in Mongolia.

Anthrax is endemic throughout Mongolia, except in the semi-desert and desert areas of the south. The prevalence of anthrax in Mongolia had drastically decreased since the 1950s due to the use of anthrax antiserum and vaccines, but the privatisation of the animal husbandry sector and changes in the structures of the veterinary and medical delivery systems in Mongolia over the last decade have resulted in challenges for disease control. Animal and human anthrax has become an increasing problem since the mid-1990s. Human cutaneous anthrax is common in Mongolia as a result of exposure to infected animals. In this paper, the authors identify potential causes forthe increase of anthrax in Mongolia. The current prevention efforts may not be adequate. Anthrax surveillance and control must be intensified, particularly in areas of high prevalence.