Table 1. Clinical and serologic findings in four patients from whom dengue virus was isolated from their throat or nasopharynx.

Patient	1	2	3	4
Age	64	17	14	12
Sex	F	M	F	M
Clinical Symptoms	Fever Myalgia Headache	Fever Myalgia Abdominal pain	Fever Nausea	Fever Myalgia Headache Vomiting Bone pain
Respiratory Symptoms	Cough Rhinorrhea Nasal congestion	Cough Rhinorrhea Sore throat	Cough Rhinorrhea	Rhinorrhea Nasal congestion
Clinical Diagnosis	Dengue	Acute tonsillitis	Suspected otitis media or dengue	Dengue
Dengue Serology	NS1 (+), IgM (-), IgG (-)	Not tested	NS1 (+), IgM (-), IgG (-)	NS1 (+), IgM (-), IgG (-)
Dengue Warning Signs	Gingival bleeding	Nil	Nil	Gingival bleeding Epistaxis Petechiae Purpura
Clinical Specimen Cultured	Nasopharyngeal swab	Throat swab	Throat swab	Throat swab
aDay of Illness during virus isolation	Day 2, febrile phase	Day 1, febrile phase	Day 4, febrile phase	Day 4, critical phase
Dengeue virus Serotype	Dengue virus type 2	Dengue virus type 2	Dengue virus type 2	Dengue virus type 1
bCase Classification	Dengue with warning signs	Dengue without warning signs	Dengue without warning signs	Severe Dengue

^aDefinition of dengue phase was based on 2009 WHO Dengue Guideline.

^bClassification was based on the 2009 WHO Dengue Guideline.