Returning traveler ( onset-duration-country-lab) likely organism.
1- short diarrhea+occasional blood + low fever >>>> E Cloi
2- Prolonged diarrhea + occasional blood>>> Entamoeba
3- Prolonged diarrhea+ bloating+no blood>>> Giardia
4- Bloody diarrhea +high fever+ abd pain >>>>> shigella
5-Constipation+fever+headache+>> Typhoid
6- Fever+ retrroorbital headache+ Asia>>>Dengue
7- Prolonged rice watery diarrhea+ dehydration>>> Cholera
8- Fever+ headache+ anemia and thrombocytopnea+ africa>>>> Malaria
9-Fever+ night sweat+ loss of weight +right iliac fossa tender>>> TB
10- Fever+ rash+ lymphadenopathy ± mouth ulcer>>>HIV seroconversion
11- Fever + rash (palm and sole)+ history of genital ulcer>>> Syphilis
12- Facial palsy + history of rash + Europe>>> Lyme disease
13- Abdominal symp+ history of chest symptom+ rash + esinophila>>> Strongyloides