ENVIRONMENT > For experts and partner cities > Biomonitoring of the environment

Monitoring of Lyme borreliosis and meningoencephalitis agents in ticks

(the text below is based on the chapter Monitoring of Lyme borreliosis and meningoencephalitis agents in ticks published in yearbook Prague Environment 2006)


In 2006 the monitoring of up-to-date percentage of ticks infected with the aetiological agents of Lyme borreliosis and meningoencephalitis in the selected areas on the territory of Prague continued. The monitoring is purposefully aimed at the monitoring of activity of natural infection focuses under the Capital City conditions.

The tick specimens collecting was performed by flagging at the selected localities by workers of the Department of Epidemiology of the Public Heath Authority of the City of Prague in the co-operation with personnel of the Municipal Public Health Authority, branches of Centre, South, West, East, and North. Testing was carried out by the Reference Laboratory for Lyme borreliosis of the SZÚ, Prague and the Reference Laboratory for Arboviruses of the Regional Public Health Authority in Ostrava.

Climatic conditions in 2006 again affected the biological development cycle of ticks, namely in summer months when the fluctuating weather conditions prevailed. The laboratories received the required number of tick specimens in every stadium of their development to carry out examination for meningoencephalitis (the basic number is 40 nymphs, 20 females, 10 males) while for testing for Lyme borreliosis samples with smaller number of tick specimens were received.

The results of the examinations for the presence of aetiological agent of Lyme borreliosis in ticks acquired by microscopic investigation showed average presence in 9.18 % pursuant to the written report of the National Reference Laboratory for Lyme borreliosis of the SZÚ, Prague.

Results of the continuous examination of ticks for the presence of tick-transmitted meningoencephalitis virus were positive for adult populations at the localities Prague 4, Kunratice – Zelené domky, where 10 females were found positive. Rest of the localities demonstrated negative results. Up-to-date results are available at the Internet pages of the Public Heath Authority of the City of Prague (www.hygpraha.cz).

The results demonstrate the prevention is necessary (as wearing suitable clothes, applying repellents, early removal of sucking ticks, including disinfection of the sucking place, and vaccination) if aforementioned localities are visited. The vaccination is carried out by the National Institute for Public Health or primary care physicians and the autumn season is the best time to get the first dose of the vaccine administered.

 

Tab.  Percentage of ticks infected with aetilological agent of meningoencephalitis – localities provided by the Department of Epidemiology of the Public Health Authority of Prague in 2006

Locality Date Females Males Nymphs Total

P8, Ďáblický háj

2. 5. 2006

50

40

20

110

results

5x10-neg.

2x20-neg.

20-neg.

110

P9, Sata1ická obora

3. 5. 2006

14

20

40

74

 results

14-neg.

20-neg.

40-neg.

74

P9, Klánovický les

4. 5. 2006

10

13

50

73

 results

10-neg.

13-neg.

50-neg.

73

DDD – Divoká Šárka

22. 5. 2006

13

16

80

109

results

13-neg.

16-neg.

40-neg.
40-neg.

109

P10, Hostivař

24. 5. 2006

20

20

50

90

results

2x10-neg.

20-neg.

50-neg.

90

P4, Kunratický les

5. 6. 2006

11

27

85

123

results

11-neg.

27-neg.

43-neg.
42-neg.

123

P4, Točná

6. 6. 2006

23

25

164

212

results

10-neg.
13-neg.

25-neg.

3x40-neg.
44-neg.

212

P4, Milíčovský les

7. 6. 2006

23

14

54

91

results

10-neg.
13-neg.

14-neg.

54-neg.

91

P4, Kunratický les –
U Labutě

13. 6. 2006

17

22

49

88

results

10-neg.
7-neg.

22-neg.

49-neg.

88

P4, Kunratický les –
Globus

14. 6. 2006

55

54

59

168

results

5x10-neg.
5-neg.

2x20-neg.
14-neg.

40-neg.
19-neg.

168

P4, Kunratický les –
Zelené domky

19. 6. 2006

53

37

38

128

results

10-pozit!-(18,86 %)
3x10-neg.
13-neg.

20-neg.
17-neg.

38-neg.

128

Source: HS HMP

 

Tab. Percentage of ticks infected with aetilological agent of Lyme borreliosis – localities provided by the Department of Epidemiology of the Public Health Authority of Prague in 2006

Locality Date Number
of samplings
Females Males Nymphs Total % positive

DDD – Praha 1, Petřín

10. 5. 2006

1

3

5

21

29

results

neg.

neg.

2 pos.

6,89

P5, Radotín, Velký Háj

15. 5. 2006

1

16

19

23

58

results

2 pos.

1 pos.

1 pos.

6,89

P9, Horní Počernice

16. 5. 2006

1

3

12

1

16

results

neg.

2 pos.

neg.

12,50

P7, Letná

22. 5. 2006

1

10

4

2

16

results

1 pozit

neg.

neg.

6,25

P10, Hostivař

24. 5. 2006

1

20

20

50

90

results

2 pos.

1 pos.

5 pos.

8,88

P6, Obora Hvězda

29. 5. 2006

1

5

7

58

70

results

neg.

1 pos.

6 pos.

10,00

P4, Kunratický Les

7. 6. 2006

1

34

25

127

186

results

5 pos.

4 pos.

9 pos.

9,67

DDD – P6, Divoká
Šárka

14. 6. 2006

1

11

9

75

95

results

3 pos.

1 pos.

6 pos.

10,52

P4, Točná II

15. 6. 2006

1

9

14

81

104

results

neg.

I pos.

neg.

0,96

P3, Pražačka

15. 6. 2006

1

26

25

8

59

results

3 pos.

2 pozit

2 pos.

11,86

P5, Pod Kesnerkou

15. 6. 2006

1

8

5

6

19

results

1 pos.

neg.

neg.

5,26

P7, Stromovka

19. 6. 2006

1

6

7

52

65

results

neg.

neg.

2 pos.

3,07

PS, Barandov
(Klukovice) Prokopák

19. 6. 2006

1

22

20

13

55

results

3 pos.

2 pos.

1 pos.

10,90

P4, Klánova – u dg. úst.

20. 6. 2006

1

7

10

5

22

results

1 pos.

2 pos.

neg.

13,63

DDD – Petřín, Praha 1

22. 6. 2006

1

5

2

15

22

results

1 pos.

2-neg.

2 pos.

13,63

P4, Kunratický les

11. 9. 2006

1

17

17

6

40

results

4-pos.

2-pos.

6-neg.

15,00

P9, Klánovický les
(za golfovým hřištěm)

12. 9. 2006

1

2

4

20

26

results

1-pos.

4-neg.

2-pos.

11,53

P4, Milíčovský les

13. 9. 2006

1

3

1

60

64

results

1-pos.

1-neg.

4-pos.

7,81

Source: HS HMP


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