欧洲疾控中心：贾第鞭毛虫病——2022年年度流行病学报告（英文版）

Giardiasis is a common parasitic infection worldwide, caused by the protozoan Giardia lamblia (syn. G. duodenalis, G. intestinalis). Giardia spp. live in the intestines of humans and animals. The parasite spreads through durable cysts that are excreted in the hosts’ faeces. These cysts can persist in the environment for several months. The disease may be asymptomatic and self-limiting, or lead to symptoms (3–25 days after infection) such as fatigue, bloating, acute diarrhoea, stomach pain and