. 2009 Apr 28;3(4):e426. doi: 10.1371/journal.pntd.0000426

Table 2. Hydatid prevalence in sheep/goats by age in Datangma district, Ganzi County.

Age group	Number infected/Number uninfected	Prevalence
<1–6 years^a	13/21	38%
10–12 years^b	12^*/5	70%
Difference between the two age groups (P value)		0.03
RR (95% Cls)		0.54 (0.32–0.92)

Examined in 2003.

Examined in 2004.

*: Six animals had infertile cysts and 6 others had fertile cysts; there was an average of 5.8 cysts per infected animal.