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Incubation & Infectious Period of Common Infectious Diseases (and how long to stay out of school!)Incubation Period.??Time it takes to start having symptoms after contact with infection.Infectious or Contagious Period.??Time during which a sick child's disease can spread to others. ?DISEASEINCUBATION PERIOD(DAYS)INFECTIOUS PERIOD(DAYS)Skin Infections/Rashes:Chickenpox10-212 days before rash until all sores have crusts (6 - 7days)Fifth disease (Erythema infectiosum)4-147 days before rash until rash beginsHand, foot, and mouth disease3-6Onset of mouth ulcers until fever goneImpetigo (strep or staph)2-5Onset of sores until 24 hours on antibioticLice7Onset of itch until 1 treatmentMeasles8-124 days before rash until 4 days after rash appearsRubella (German measles)14-217 days before rash until 5 days after rash appearsScabies30-45Onset of rash until 1 treatmentScarlet fever3-6Onset of fever or rash until 24 hours on antibioticShingles (contagious for chicken pox)14-16Onset of rash until all sores have crusts (7 days) (Note: No need to isolate if sores can be kept covered.)Warts30-180Minimally contagiousRespiratory Infections:Bronchiolitis4-6Onset of cough until 7 daysColds2-5Onset of runny nose until fever goneCold sores (herpes)2-12Footnote 1Coughs (viral) or croup (viral)2-5Onset of cough until fever goneDiphtheria2-5Onset of sore throat until 4 days on antibioticInfluenza1-2Onset of symptoms until fever goneSore throat, strep2-5Onset of sore throat until 24 hours on antibioticSore throat, viral2-5Onset of sore throat until fever goneTuberculosis6-24 monthsUntil 2 weeks on drugs (Note: Most childhood TB is not contagious.)Whooping cough7-10Onset of runny nose until 5 days on antibioticIntestinal Infections:Diarrhoea, bacterial1-5Footnote 2 for Diarrhoea PrecautionsDiarrhoea, giardia7-28Footnote 2 for Diarrhoea PrecautionsDiarrhoea, traveller’s1-6Footnote 2 for Diarrhoea PrecautionsDiarrhoea, viral (Rotavirus)1-3Footnote 2 for Diarrhoea PrecautionsHepatitis A14-502 weeks before jaundice begins until jaundice resolved (7 days)Pinworms21-28Minimally contagious, staying home is unnecessaryVomiting, viral2-5Until vomiting stopsOther Infections:Infectious mononucleosis30-50Onset of fever until fever gone (7 days)Meningitis, bacterial2-107 days before symptoms until 24 hours on IV antibiotics in hospitalMeningitis, viral3-6Onset of symptoms and for 1-2 weeksMumps12-255 days before swelling until swelling gone (7 days)Pinkeye without pus (viral)1-5Mild infection, staying home is unnecessaryPinkeye with pus (bacterial)2-7Onset of pus until 1 day on antibiotic eyedropsNotesCold sores:??Less than 6 years old, contagious until cold sores are dry (4-5 days). No isolation if sores are on part of body that can be covered. ?More than 6 years old, no isolation necessary if beyond touching, picking stage.Diarrhoea Precautions:?Contagious until stools are formed. ?Stay home until fever is gone, diarrhoea is mild, blood and mucus are gone, and toilet-trained child has control over loose stools. ?Shigella and E-coli 0157 require extra precautions. ................
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