No. Disease Characteristics
1 Immediate gastrointestinal hypersensitivity - nausea, emesis and abdominal pain within 1 to 2 hours of exposure to the allergen
-  diarrhea within 2 to 6 hours of exposure to the allergen
2 Oral allergy syndrome - those with a history of sensitivity to pollen are usually affected
- occurs from eating fresh fruits and vegetables
- symptoms are localized to the oropharynx (lips, tongue, roof of the mouth, throat)
- symptoms include itching, swelling, and tingling
3 Eosinophilic esophagitis - eosinophilic inflammation of the esophagus
- children: gastro-esophageal reflux, vomiting, abdominal pain, feeding disorders
- Adolescents and adults: dysphagia and esophageal food impactions
4 Eosinophilic gastroenteritis - symptoms depend on the affected portion of the gastrointestinal tract
- symptoms include abdominal pain, vomiting, early satiety, anorexia, and sometimes hematemesis
- if eosinophilic infiltration is located in the antrum patient may present symptoms of pyloric stenosis
5 Food protein-induced allergic proctocolitis - usually presents in infants
- stool with streaks or specks of blood mixed with mucus
- symptoms include vomiting, diarrhea, and growth failure
- allergenic foods are milk and soy
6 Food protein-induced enterocolitis syndrome - usually presents in young infants
- symptoms include chronic emesis, diarrhea, and failure to thrive
- milk and soy are foods involved
- reintroduction of food after a washout period occurs with repeated vomiting and dehydration syndrome
Table 2: Clinical presentation [1,14,15].