Intestinal helminthiases

Parasitological survey (Kato-Kaz, Allen-Riddley methods) of 30388 persons, mainly children and few adults, in 15 out of 28 northern regions of Russia was performed in 1994-2000 (Table 6.2). The population of villages and day-care children institutions were included. While 34.6% of enterobiasis was revealed among examined subjects, 10.1% had other intestinal helminthiases. The highest percentage of Enterobius vermicularis infection was revealed in Khabarovsky kraj - 54.6%. From zero to 4.1% of ascariasis was found in the examined subjects in KPAD. Up to 3.7% of hymenolepiasis was reported in the Taimir population. Diphyllobothriasis was revealed only in 1% of those examined in both regions. Enterobiasis was found in 15% of examined persons (mostly children) in HMAD (where O. felineus infection was revealed up to 52.1%). The Tomsk region gave the most impressive results, where O. felineus infection was revealed in 54.3-67.1%. In addition, enterobiasis was found in 32.8%, ascariasis in 2.4%, and lambliasis in 3.4% (Report to the Federal Programme 'Children of the North' 1996). Enterobiasis in the north of Russia is distributed equally or even more intensively than in the other geographical zones of the country. This underlined the social significance of infection and the necessity of improving the living conditions of the population of the North. Indigenous ascariasis cases in the

North were connected to focal greenhouses. Parasite eggs were able to develop under artificially warm conditions of greenhouses but not in the soil of natural environment (Lebedev et al. 1996). The mean morbidity rate for enterobiasis in Russia was 650.6 in 1999, also in the Arkhangelsk region it reached 6038.1, in the Mari El and the Udmurtia Republic it was 6489 and 6138, respectively, and in NenezkyAD it was 5537 (Siskova et al. 2001).

Table 6.2 Prevalence of helminth infections (data collected by the Martsinovsky Institute of Medical Parasitology and Tropical Medicine in the field during 1994-2000)

Terrritories

Number of settlements

Number of

With enterobiasis

With other interstinal

where investigation

subjects

among them

helminthiases among

had been performed

examined

them

Altaiszkij kraj

7

1805

851

14

Amurskaja oblast

17

2416

893

188

Burjatskajia AO

4

1042

501

4

Chukotskaja AO

19

1883

350

11

Kamchatskaja oblast

3

805

355

2

Khabarovskij kraj

29

4072

2225

144

Khanti-Mansi AO

9

2929

1391

485

Komi-Permjatskij AO

9

1963

320

147

Korjak AO

5

1528

325

2

Primorskij kraj

6

1105

138

56

Sakha-Yakutija

6

2474

371

118

Republic

Taimirskij AO

10

1953

372

12

Tomskaja oblast

32

4388

1366

1677

Tumenskaja oblast

9

481

245

133

Yamalo-Neneckij AO

6

1542

810

75

Total

171

30388

10513

3068

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