Incubation period for febrile illnesses

Common Infections

• Less than 10 days
  • Arboviruses
  • Gastroenteritis
  • Respiratory infections
• 10 days to 3 weeks
  • Enteric fever
  • Leptospirosis
  • Melioidosis
  • Q fever
• More than 3 weeks
  • Bacteria (TB, brucellosis)
  • Tick fever
  • Relapsing fever
  • CMV/EBV/HIV/HAV/HBV/HCV
  • Malaria
  • Trypanosomiasis
  • Coccidiomycosis
  • Histoplasmosis

By Organism

	Usual incubation period	Incubation period range
Anaplasma phagocytophilum	1 to 2 weeks
Babesia microti	1 to 6 weeks
Bacillus anthracis	2 to 5 days
Bartonella henselae	3 to 10 days
Blastomyces dermatitidis	3 weeks to 3 months
Bordetella pertussis	7 to 10 days	5 to 21 days
Borrelia recurrentis	7 days	2 to 18 days
Brucella melitensis	2-4 weeks	5 days to 6 months
Burkholderia pseudomallei	9 days	1 to 21 days
Chikungunya virus	1 to 12 days
Chlamydia psittaci	4 to 15 days
Chlamydia trachomatis	2 to 3 weeks
Clostridium tetani	3 to 21 days
Coccidioides immitis	1 to 3 weeks
Corynebacterium diphtheriae	2 to 4 days
Coxiella burnetii	20 days	1 to 39 days
Cryptosporidium hominis	7 days	1 to 30 days
Cystoisospora belli	1 week
Dengue virus	4 to 7 days
Eastern equine encephalitis virus	4 to 10 days
Ebola virus	3 to 13 days	2 to 21 days
Ehrlichia	7 days
Enteric fever	5 to 21 days
Epstein-Barr virus	30 to 50 days
Francisella tularensis	3 to 5 days	1 to 21 days
Giardia lamblia	1 to 2 weeks
Hantavirus	14 days	5 to 42 days
Hepatitis A virus	15 to 50 days
Hepatitis C virus	5 to 12 weeks
Hepatitis D virus	3 to 7 weeks
Hepatitis E virus	4 to 6 weeks
Herpes simplex virus	within 5 days
Human immunodeficiency virus	2 to 6 weeks
Human papillomavirus	3 to 4 months	6 weeks to 2 years
Klebsiella granulomatis	50 days	1 to 360 days
Legionella	2 to 10 days	up to 28 days
Leishmania	2 weeks to several months	up to several years
Leptospira	10 days	5 to 14 days
Listeria monocytogenes	30 days	11 to 90 days
Marburg virus	2 to 21 days
Measles virus	10 to 14 days	up to 21 days
Mpox virus	12 days
Mumps virus	16 to 18 days	2 to 4 weeks
Mycobacterium avium complex	months to years
Mycobacterium chimaera	14.5 months	6 weeks to 5 years
Mycobacterium leprae	3-5 years	wide range
Neisseria gonorrhoeae	10 days 3 to 5 days
Neonatal HSV	7 to 21 days	birth to 6 weeks
Non-typhoidal Salmonella	6 to 48 hours	up to 7 days
Norovirus	24 to 48 hours
... further results

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