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
Herpangina (see Enteroviral infection)
Condition Isolation Duration of Isolation Comment

See enterovirus

Herpes simplex (herpesvirus hominis)
Condition Isolation Duration of Isolation Comment
If encephalitis ONLY
Mucocutaneous, disseminated or primary, severe

Until lesions are dry and crusted

Mucocutaneous, recurrent (skin, oral, genital)
Neonatal

Until mucocutaneous lesions are dry and crusted

Use contact isolation, for asymptomatic, exposed infants delivered vaginally/via C-section 1) if mother has active infection, 2) membranes have been ruptured for more than 4 hours until infant surface cultures obtained at 24-36 hours of age are negative after 48 hours incubation

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
Infants and young children

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

See also Metapneumovirus

All other patients

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

All other patients: Duration of illness

See also Metapneumovirus

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
Infants and young children

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.

All other patients

Duration of illness

Influenza, Avian (e.g., H5N1, H7N9)
Condition Isolation Duration of Isolation Comment
Eye Protection

Immediately contact Infection Prevention. Business hours: 415-806-0269; non-business hours: Notify Nursing Supervisor.

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)

Change patient gown and linen post treatment (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)

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