Hantavirus infection differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Differentiating Hantavirus infection from other Diseases

Disease	Incubation period	Vector	Symptoms							Physical signs		Lab findings		Other findings	Treatment
			Fever	Cough	Rash	Joint pain	Myalgia	Diarrhea	Common hemorrhagic symptoms	Characterestic physical finding	Icterus	Plasma Creatine kinase	Confirmatory test
Leptospirosis	2 to 30 days	Rodents Domestic animals	Fever last for 4-7 days, remission for 1-2 days and then relapse	+	Present over legs Hemorrhagic rash	+	+ (Severe myalgia is characteristic of leptospirosis typically localized to the calf and lumbar areas)	+	Conjunctival hemorrhage, Hemoptysis	Conjunctival suffusion	+	Elevated	Microscopic agglutination test of urine	History of exposure to soil or water contaminated by infected rodents Recent history travel to tropical, sub tropical areas or humid areas	NSAIDs
Dengue	4 to 10 days	Aedes mosquito	Fever last for 1-2 days, remission for 1-2 days and then relapse for 1-2 days (Biphasic fever pattern)	-	Over legs and trunk pruritic rash May be hemorrhagic	+	+	-	Upper gastrointestinal bleeding	Painful lymphadenopathy	-	Normal	Serology showing positive IgM or IgG	Recent travel to South America, Africa, Southeast Asia	Supportive care Avoid aspirin and other NSAIDs
Malaria	Plasmodium falciparum: 9-14 days Plasmodium vivax: 12-18 days Plasmodium ovale: 18-40 days	Female Anopheles	Fever present daily or on alternate day or every 3 days depending on Plasmodium sps.	-	No rash	-	+	-	Bloody urine	Hepatosplenomegaly	+	Normal	Giemsa stained thick and thin blood smears	Recent travel to South America, Africa, Southeast Asia	Anti malarial regimen
Ebola	2 to 21 days.	No vector Human to human transmission Air born disease	+	+	Maculopapular non-pruritic rash with erythema Centripetal distribution	+	+	+ May be bloody in the early phase	Epistaxis Mucosal bleeding	Sudden onset of high fever with conjunctival injection and early gastrointestinal symptoms	-	Normal	RT-PCR	Recent visit to endemic area especially African countries	Isolation of the patient, supportive therapy
Influenza	1-4 days	No vector Air born disease	+	+	+/-	+	+	+	-	Fever and upper respiratory symptoms	-	Normal	Viral culture or PCR	Health care workers Patients with co-morbid conditions	Symptomatic treatment Oseltamivir or zanamivir
Yellow fever	3 to 6 days	Aedes or Haemagogus species mosquitoes	+	+	-	-	+	-	Conjunctival hemorrhage, Hemoptysis	Relative bradycardia (Faget's sign)	+	Normal	RT-PCR, Nucleic acid amplification test, Immuno-histochemical staining	Recent travel to  Africa, South and Central America, and the Caribbean. Tropical rain forests of south America	Symptomatic treatment, Anti-inflammatory drugs
Typhoid fever	6 to 30 days	No vector Air born disease	+	-	Blanching erythematous  maculopapularlesions on the lower chest and abdomen	+	+	+	Intestinal bleeding	Rose spots	-	Normal	Blood or stool culture showing salmonella typhi sps.	Residence in endemic area Recent travel to endemic area	Fluoroquinolones, Third generation cephalosporins, Azithromycin