Giardia infection is an intestinal infection marked by abdominal cramps, bloating, nausea and bouts of watery diarrhoea, said Mayo Clinic.
The site continued: “Giardia infection is caused by a microscopic parasite that is found worldwide.
“Giardia infections usually clear up within a few weeks.
“But you may have intestinal problems long after the parasites are gone.
“Several drugs are generally effective against giardia parasites, but not everyone responds to them.”
source: express.co.uk