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Echinococcosis in Tibetan populations, western Sichuan Province, China.

Tiaoying L, Jiamin Q, Wen Y, Craig PS, Xingwang C, Ning X, Ito A, Giraudoux P, Wulamu M, Wen Y, Schantz PM - Emerging Infect. Dis. (2005)

Bottom Line: Prevalences of both CE and AE were significantly higher in female than male patients and increased with the age of the person screened.Prevalence of CE varied in 5 townships from 0% to 12.1%, whereas AE prevalence ranged from 0% to 14.3%.Risk factors associated with both infections included the number of owned dogs, frequency of contact with dogs, and sources of drinking water.

View Article: PubMed Central - PubMed

Affiliation: Sichuan Centers for Disease Control and Prevention, Chengdu, Sichuan Province, People's Republic of China.

ABSTRACT
We screened 3,199 people from Shiqu County, Sichuan Province, China, for abdominal echinococcosis (hydatid disease) by portable ultrasound combined with specific serodiagnostic tests. Both cystic echinococcosis (CE) (Echinococcus granulosus infection) and alveolar echinococcosis (AE) (E. multilocularis) were co-endemic in this area at the highest village prevalence values recorded anywhere in the world: 12.9% were infected with one or the other form (6.8% CE and 6.2% AE). Prevalences of both CE and AE were significantly higher in female than male patients and increased with the age of the person screened. Pastoral herdsmen were at highest risk for infection (prevalence 19.0%). Prevalence of CE varied in 5 townships from 0% to 12.1%, whereas AE prevalence ranged from 0% to 14.3%. Risk factors associated with both infections included the number of owned dogs, frequency of contact with dogs, and sources of drinking water.

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Human prevalences of echinococcosis by age groups. HD, hydatidosis; CE, cystic echinococcosis; AE, alveolar echinococcosis.
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Figure 4: Human prevalences of echinococcosis by age groups. HD, hydatidosis; CE, cystic echinococcosis; AE, alveolar echinococcosis.

Mentions: Of 414 persons with evidence of abdominal echinococcosis, 244 (CE = 134, AE = 110) were female patients, and 170 (CE = 82, AE = 88) were male. Thus, the prevalence of echinococcosis in female patients was 14.7% (244/1,660), and 11.0% (170/1,539) in male patients. Thus, prevalence in female patients was significantly higher than in males (χ2 = 9.46, p<0.01). Compared with other older groups, the population <20 years of age had a lower infection prevalence (5.4%). In general, prevalence increased with age and reached a peak in the age group of >50 to <60 (Figure 4). The prevalence in the age group of >10 to <20 years was significantly lower than in the age group of >20 to <30 years (χ2 = 10.20, p<0.01). The youngest person infected with CE was 4 years of age, the oldest one was 79 years, and the average age of persons with CE was 39.0 years (n = 216). The youngest persons with AE was 8 years of age, the oldest 80 years, and the average age of AE patients was 43.1 years (n = 198) (Figure 5).


Echinococcosis in Tibetan populations, western Sichuan Province, China.

Tiaoying L, Jiamin Q, Wen Y, Craig PS, Xingwang C, Ning X, Ito A, Giraudoux P, Wulamu M, Wen Y, Schantz PM - Emerging Infect. Dis. (2005)

Human prevalences of echinococcosis by age groups. HD, hydatidosis; CE, cystic echinococcosis; AE, alveolar echinococcosis.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3367622&req=5

Figure 4: Human prevalences of echinococcosis by age groups. HD, hydatidosis; CE, cystic echinococcosis; AE, alveolar echinococcosis.
Mentions: Of 414 persons with evidence of abdominal echinococcosis, 244 (CE = 134, AE = 110) were female patients, and 170 (CE = 82, AE = 88) were male. Thus, the prevalence of echinococcosis in female patients was 14.7% (244/1,660), and 11.0% (170/1,539) in male patients. Thus, prevalence in female patients was significantly higher than in males (χ2 = 9.46, p<0.01). Compared with other older groups, the population <20 years of age had a lower infection prevalence (5.4%). In general, prevalence increased with age and reached a peak in the age group of >50 to <60 (Figure 4). The prevalence in the age group of >10 to <20 years was significantly lower than in the age group of >20 to <30 years (χ2 = 10.20, p<0.01). The youngest person infected with CE was 4 years of age, the oldest one was 79 years, and the average age of persons with CE was 39.0 years (n = 216). The youngest persons with AE was 8 years of age, the oldest 80 years, and the average age of AE patients was 43.1 years (n = 198) (Figure 5).

Bottom Line: Prevalences of both CE and AE were significantly higher in female than male patients and increased with the age of the person screened.Prevalence of CE varied in 5 townships from 0% to 12.1%, whereas AE prevalence ranged from 0% to 14.3%.Risk factors associated with both infections included the number of owned dogs, frequency of contact with dogs, and sources of drinking water.

View Article: PubMed Central - PubMed

Affiliation: Sichuan Centers for Disease Control and Prevention, Chengdu, Sichuan Province, People's Republic of China.

ABSTRACT
We screened 3,199 people from Shiqu County, Sichuan Province, China, for abdominal echinococcosis (hydatid disease) by portable ultrasound combined with specific serodiagnostic tests. Both cystic echinococcosis (CE) (Echinococcus granulosus infection) and alveolar echinococcosis (AE) (E. multilocularis) were co-endemic in this area at the highest village prevalence values recorded anywhere in the world: 12.9% were infected with one or the other form (6.8% CE and 6.2% AE). Prevalences of both CE and AE were significantly higher in female than male patients and increased with the age of the person screened. Pastoral herdsmen were at highest risk for infection (prevalence 19.0%). Prevalence of CE varied in 5 townships from 0% to 12.1%, whereas AE prevalence ranged from 0% to 14.3%. Risk factors associated with both infections included the number of owned dogs, frequency of contact with dogs, and sources of drinking water.

Show MeSH
Related in: MedlinePlus