What is a common gastrointestinal parasite associated with traveller's diarrhoea that can cause steatorrhoea?

Giardia lamblia is indeed a common gastrointestinal parasite associated with traveler's diarrhoea that is specifically known to cause steatorrhoea. This organism is a protozoan that infects the intestines and can lead to a variety of gastrointestinal symptoms, including diarrhea characterized by an oily or fatty consistency, which is indicative of steatorrhoea. This is due to the parasite interfering with the absorption of fats in the intestines, resulting in excessive fat in the stool.

Traveler's diarrhoea is commonly caused by ingesting contaminated water or food while traveling, particularly in areas with poorer sanitation. Giardiasis, the infection caused by Giardia lamblia, often manifests with abdominal cramps, bloating, and intermittent diarrhea that can be malodorous and contain foul-smelling fatty stools.

Other options may also be associated with gastrointestinal issues, but they have different characteristics or implications. For example, Entamoeba histolytica can cause dysentery but is not primarily known for causing steatorrhoea. Cryptosporidium parvum can lead to diarrhea, especially in immunocompromised individuals, but steatorrhoea is less common with its infection. Salmonella enterica typically causes acute gastroenteritis with bloody stools but is not