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Epidemiology and Surveillance

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Public Health Weekly Report 2022; 15(25): 1773-1783

Published online June 23, 2022

© The Korea Disease Control and Prevention Agency

Infection status of intestinal helminths in 2021

Myoung-Ro Lee, Jung-Won Ju, Seon-Ok Baek, Young-Ju Lee, Hee-Il Lee

Division of Vectors and Parasitic Diseases, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency (KDCA)

Abstract

Sections

The infection status of intestinal parasites among residents living in endemic areas that have high level infection rates of food-borne parasites such as Clonorchis sinensis were investigated in 2021. This study’s survey used a test method that gathered stool samples from residents in the endemic areas and the number of eggs were confirmed by microscope. The rates of intestinal parasite infection were found to have declined by 0.7% from 5.9% in 2020 to 5.2% in 2021. The infection rate of C. sinensis was 3.3%, and heterophyid flukes was 1.6%, and 0.3% for Trichuris trichiura. Furthermore, a new area (Yeongdong-gun) was investigated. The infection rates of intestinal parasites was 10.0% which was the third highest infection rate among all participating areas. Continuous testing and monitoring are necessary to reduce the rate of intestinal parasite infection.

Key words Intestinal parasites, Clonorchis sinensis, Infection rates

Sections
Table 1. Egg positive rate of intestinal parasites by locality in 2020 and 2021
Locality20202021
No. of examNo. of positive casesPositive rates (%)No. of examNo. of positive casesPositive rates (%)
GyeongnamJinju-si24293.7394235.8
Miryang-si975222.3944121.3
Uiryeong-gun15742.5415153.6
Haman-gun2,0201035.11,423533.7
Changnyeong-gun938323.4725324.4
Hadong-gun1,09317516.05449517.5
Sancheong-gun903353.9823607.3
Hamyang-gun1,213544.51,055615.8
Geochang-gun818415.0652345.2
Hapcheon-gun870536.1500163.2
Total9,2295285.77,4754015.4
GyeongbukPohang-si49220.4495234.6
Andong-si2867225.23159128.9
Sangju-si688223.237861.6
Cheongsong-gun6196911.1460153.3
Yeongcheon-si---510244.7
Yecheon-gun344154.4353164.5
Youngduk-gun690639.1---
Total3,1192437.82,5111757.0
JeonnamGurye-gun1,99527914.01,035777.4
Suncheon-si480245.037492.4
Naju-si301134.3430153.5
Gwangyang-si324206.2413307.3
Damyang-gun280124.3400102.5
Gokseong-gun6718212.22,0141758.7
Boseong-gun326103.1380112.9
Hwasun-gun3043310.9426133.1
Gangjin-gun29941.3411133.2
Haenam-gun317113.5420163.8
Hampyeong-gun36892.443320.5
Yeonggwang-gun28920.745410.2
Yeongam-gun30872.3---
Muan-gun31820.6---
Jangseong-gun29800.0---
Total6,8785087.47,1903725.2
JeonbukNamwon-si1,121716.31,016242.4
Jinan-gun725182.5738212.8
Sunchang-si711131.8704121.7
Imsil-gun329164.9194115.7
Muju-gun301186.0---
Total3,1871364.32,652682.6
ChungnamGongju-si19821.011621.7
Geumsan-gun697213.030362.0
Gyeryong-si9811.0---
Total993242.441981.9
ChungbukGoesan-gun---20873.4
Yeongdong-gun---6396410.0
Okcheon-gun1,099565.1316216.6
Chungju-si65730.5---
Jecheon-si20342.0---
Total1,959633.21,163927.9
Total25,6421,5025.921,4101,1165.2

Figure 1. Positive rate by intestinal parasites in 2021

Figure 2. Comparison of intestinal parasite infection rates by river basin

Figure 3. Comparison intestinal parasites infection rates by age and sex

Figure 4. Comparison C. sinensis infection rates (%) (left) and intensity (eggs per gram of feces, EPG) (right) by administrative district

References

Sections
  1. Korea Centers for Disease Control and PreventionKorea Nation Institute of Health. 2013. National survey of the prevalence of intestinal parasitic infections in Korea, 2012. The 8th Report. Osong Chungcheongbuk-do, Korea.
  2. World Health Organization. Provisional Agenda of the Fifty-Fourth World Health Assembly. 2001;p. A54/10. https://apps.who.int/iris/handle/10665/78662
  3. Na BK, Park JH, Hong SJ. Clonorchis sinensis and Clonorchiasis. Acta Tropica 2020;203:105309. https://doi.org/10.1016/j.actatropica.2019.105309
    Pubmed CrossRef
  4. Hong ST, Fang Y. Clonorchis sinensis and Clonorchiasis, an update. Parasitol Int 2012;61:17-24.
    Pubmed CrossRef

Epidemiology and Surveillance

Public Health Weekly Report 2022; 15(25): 1773-1783

Published online June 23, 2022

Copyright © The Korea Disease Control and Prevention Agency.

Infection status of intestinal helminths in 2021

Myoung-Ro Lee, Jung-Won Ju, Seon-Ok Baek, Young-Ju Lee, Hee-Il Lee

Division of Vectors and Parasitic Diseases, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency (KDCA)

Abstract

The infection status of intestinal parasites among residents living in endemic areas that have high level infection rates of food-borne parasites such as Clonorchis sinensis were investigated in 2021. This study’s survey used a test method that gathered stool samples from residents in the endemic areas and the number of eggs were confirmed by microscope. The rates of intestinal parasite infection were found to have declined by 0.7% from 5.9% in 2020 to 5.2% in 2021. The infection rate of C. sinensis was 3.3%, and heterophyid flukes was 1.6%, and 0.3% for Trichuris trichiura. Furthermore, a new area (Yeongdong-gun) was investigated. The infection rates of intestinal parasites was 10.0% which was the third highest infection rate among all participating areas. Continuous testing and monitoring are necessary to reduce the rate of intestinal parasite infection.

Keywords: Intestinal parasites, Clonorchis sinensis, Infection rates

Body

Egg positive rate of intestinal parasites by locality in 2020 and 2021
Locality20202021
No. of examNo. of positive casesPositive rates (%)No. of examNo. of positive casesPositive rates (%)
GyeongnamJinju-si24293.7394235.8
Miryang-si975222.3944121.3
Uiryeong-gun15742.5415153.6
Haman-gun2,0201035.11,423533.7
Changnyeong-gun938323.4725324.4
Hadong-gun1,09317516.05449517.5
Sancheong-gun903353.9823607.3
Hamyang-gun1,213544.51,055615.8
Geochang-gun818415.0652345.2
Hapcheon-gun870536.1500163.2
Total9,2295285.77,4754015.4
GyeongbukPohang-si49220.4495234.6
Andong-si2867225.23159128.9
Sangju-si688223.237861.6
Cheongsong-gun6196911.1460153.3
Yeongcheon-si---510244.7
Yecheon-gun344154.4353164.5
Youngduk-gun690639.1---
Total3,1192437.82,5111757.0
JeonnamGurye-gun1,99527914.01,035777.4
Suncheon-si480245.037492.4
Naju-si301134.3430153.5
Gwangyang-si324206.2413307.3
Damyang-gun280124.3400102.5
Gokseong-gun6718212.22,0141758.7
Boseong-gun326103.1380112.9
Hwasun-gun3043310.9426133.1
Gangjin-gun29941.3411133.2
Haenam-gun317113.5420163.8
Hampyeong-gun36892.443320.5
Yeonggwang-gun28920.745410.2
Yeongam-gun30872.3---
Muan-gun31820.6---
Jangseong-gun29800.0---
Total6,8785087.47,1903725.2
JeonbukNamwon-si1,121716.31,016242.4
Jinan-gun725182.5738212.8
Sunchang-si711131.8704121.7
Imsil-gun329164.9194115.7
Muju-gun301186.0---
Total3,1871364.32,652682.6
ChungnamGongju-si19821.011621.7
Geumsan-gun697213.030362.0
Gyeryong-si9811.0---
Total993242.441981.9
ChungbukGoesan-gun---20873.4
Yeongdong-gun---6396410.0
Okcheon-gun1,099565.1316216.6
Chungju-si65730.5---
Jecheon-si20342.0---
Total1,959633.21,163927.9
Total25,6421,5025.921,4101,1165.2

Figure 1. Positive rate by intestinal parasites in 2021

Figure 2. Comparison of intestinal parasite infection rates by river basin

Figure 3. Comparison intestinal parasites infection rates by age and sex

Figure 4. Comparison C. sinensis infection rates (%) (left) and intensity (eggs per gram of feces, EPG) (right) by administrative district

Fig 1.

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Figure 1.Positive rate by intestinal parasites in 2021
Public Health Weekly Report 2022; 15: 1773-1783

Fig 2.

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Figure 2.Comparison of intestinal parasite infection rates by river basin
Public Health Weekly Report 2022; 15: 1773-1783

Fig 3.

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Figure 3.Comparison intestinal parasites infection rates by age and sex
Public Health Weekly Report 2022; 15: 1773-1783

Fig 4.

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Figure 4.Comparison C. sinensis infection rates (%) (left) and intensity (eggs per gram of feces, EPG) (right) by administrative district
Public Health Weekly Report 2022; 15: 1773-1783
Egg positive rate of intestinal parasites by locality in 2020 and 2021
Locality20202021
No. of examNo. of positive casesPositive rates (%)No. of examNo. of positive casesPositive rates (%)
GyeongnamJinju-si24293.7394235.8
Miryang-si975222.3944121.3
Uiryeong-gun15742.5415153.6
Haman-gun2,0201035.11,423533.7
Changnyeong-gun938323.4725324.4
Hadong-gun1,09317516.05449517.5
Sancheong-gun903353.9823607.3
Hamyang-gun1,213544.51,055615.8
Geochang-gun818415.0652345.2
Hapcheon-gun870536.1500163.2
Total9,2295285.77,4754015.4
GyeongbukPohang-si49220.4495234.6
Andong-si2867225.23159128.9
Sangju-si688223.237861.6
Cheongsong-gun6196911.1460153.3
Yeongcheon-si---510244.7
Yecheon-gun344154.4353164.5
Youngduk-gun690639.1---
Total3,1192437.82,5111757.0
JeonnamGurye-gun1,99527914.01,035777.4
Suncheon-si480245.037492.4
Naju-si301134.3430153.5
Gwangyang-si324206.2413307.3
Damyang-gun280124.3400102.5
Gokseong-gun6718212.22,0141758.7
Boseong-gun326103.1380112.9
Hwasun-gun3043310.9426133.1
Gangjin-gun29941.3411133.2
Haenam-gun317113.5420163.8
Hampyeong-gun36892.443320.5
Yeonggwang-gun28920.745410.2
Yeongam-gun30872.3---
Muan-gun31820.6---
Jangseong-gun29800.0---
Total6,8785087.47,1903725.2
JeonbukNamwon-si1,121716.31,016242.4
Jinan-gun725182.5738212.8
Sunchang-si711131.8704121.7
Imsil-gun329164.9194115.7
Muju-gun301186.0---
Total3,1871364.32,652682.6
ChungnamGongju-si19821.011621.7
Geumsan-gun697213.030362.0
Gyeryong-si9811.0---
Total993242.441981.9
ChungbukGoesan-gun---20873.4
Yeongdong-gun---6396410.0
Okcheon-gun1,099565.1316216.6
Chungju-si65730.5---
Jecheon-si20342.0---
Total1,959633.21,163927.9
Total25,6421,5025.921,4101,1165.2

References

  1. Korea Centers for Disease Control and PreventionKorea Nation Institute of Health. 2013. National survey of the prevalence of intestinal parasitic infections in Korea, 2012. The 8th Report. Osong Chungcheongbuk-do, Korea.
  2. World Health Organization. Provisional Agenda of the Fifty-Fourth World Health Assembly. 2001;p. A54/10. https://apps.who.int/iris/handle/10665/78662
  3. Na BK, Park JH, Hong SJ. Clonorchis sinensis and Clonorchiasis. Acta Tropica 2020;203:105309. https://doi.org/10.1016/j.actatropica.2019.105309
    Pubmed CrossRef
  4. Hong ST, Fang Y. Clonorchis sinensis and Clonorchiasis, an update. Parasitol Int 2012;61:17-24.
    Pubmed CrossRef

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