Isolation Table

A B C D E F G H I K L M N O P Q R S T U V W Y Z
Herpes simplex (herpesvirus hominis)
Condition Isolation Duration of Isolation Comment
Mucocutaneous, disseminated or primary, severe

Until lesions are dry and crusted

Mucocutaneous, recurrent (skin, oral, genital)
Herpes zoster (see varicella zoster)
Condition Isolation Duration of Isolation Comment

See varicella zoster

Histoplasmosis
Condition Isolation Duration of Isolation Comment
Hookworm disease (ancylostomiasis, uncinariasis) (Ancylostoma duodenale, Necator americanus)
Condition Isolation Duration of Isolation Comment
Human metapneumovirus
Condition Isolation Duration of Isolation Comment

Adult and Pediatric hematology/oncology/BMT patients:
Duration of illness AND retest is negative.

 

All other patients:  Duration of symptoms

Impetigo
Condition Isolation Duration of Isolation Comment

Until 24 hours after initiation of effective therapy

Infectious mononucleosis
Condition Isolation Duration of Isolation Comment
Influenza (A, B, or unknown subtype); seasonal influenza
Condition Isolation Duration of Isolation Comment
Benioff Children's Hospital and Pediatricts

Adult and Pediatric hematology/oncology/BMT patients:
Duration of illness AND retest is negative.

All other patients:  Duration of illness

Initiate isolation when test is ordered to rule out viral pathogens.

Adult Services

Adult and Pediatric hematology/oncology/BMT patients:
Duration of illness AND retest is negative.

All other patients:  Duration of illness

Initiate isolation when test is ordered to rule out viral pathogens.

Influenza, Avian (e.g., H5N1, H7N9)
Condition Isolation Duration of Isolation Comment
Benioff Children's Hospital and Pediatrics

Adult and Pediatric hematology/oncology/BMT patients:
Duration of illness AND retest is negative.

 

All other patients:  Duration of illness

Initiate isolation when test is ordered to rule out viral pathogens.

Adult Services

Adult and Pediatric hematology/oncology/BMT patients:
Duration of illness AND retest is negative.

 

All other patients:  Duration of illness

Initiate isolation when test is ordered to rule out viral pathogens.

Kawasaki syndrome
Condition Isolation Duration of Isolation Comment
Lassa fever (see Viral Hemorrhagic Fevers)
Condition Isolation Duration of Isolation Comment
Legionella (Legionnaires’ disease)
Condition Isolation Duration of Isolation Comment
(Legionella sp.)
Leprosy
Condition Isolation Duration of Isolation Comment
(Mycobacterium leprae)
Leptospirosis
Condition Isolation Duration of Isolation Comment
(Leptospira sp.)
Lice
Condition Isolation Duration of Isolation Comment
Head lice (pediculosis)

24 hours after treatment (shampoo or oral medication)

Comb patient's hair with metal, long-toothed nit comb (available from Pharmacy) at least daily x 2 wks
Change patient gown and linen post treatment 
Guidance at https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/HeadLice.aspx

Also, please see Lice Tip Sheet

Body lice
Pubic lice
Listeriosis
Condition Isolation Duration of Isolation Comment
(Listeria monocytogenes)
Lyme disease
Condition Isolation Duration of Isolation Comment
(borreliosis, Borrelia burgdorferi)
Lymphocytic choriomeningitis
Condition Isolation Duration of Isolation Comment
Lymphogranuloma venereum
Condition Isolation Duration of Isolation Comment
Malaria
Condition Isolation Duration of Isolation Comment

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