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A 37-year-old member asked:

what is the main difference between infectious and non-infectious diseases?

1 doctor answer2 doctors weighed in
Dr. Joel Gallant
Infectious Disease 36 years experience
Microorganisms: Infectious diseases are caused by pathogenic microorganisms: bacteria, viruses, fungi, and parasites. Everything else is non-infectious (except for the "non-infectious" diseases that will turn out to be infectious once we figure out what really causes them).

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A member asked:

Is impetigo contagious?

2 doctor answers3 doctors weighed in
Dr. Arthur Torre
Pediatric Allergy and Asthma 51 years experience
Yes: Since it is a bacterial infection, other children or even adults in contact with the rash can catch impetigo.
A member asked:

Is meningitis contagious?

10 doctor answers14 doctors weighed in
Dr. Scott Katz
Pediatrics 26 years experience
Yes: Although some types are more contagious than others, the three most common types of bacterial meningitis all have vaccines available to reduce the risk. There are no vaccines for viral meningitis, but fortunately viral meningitis is typically less serious than bacterial.
A 21-year-old member asked:

How long is a person with diphtheria contagious?

1 doctor answer1 doctor weighed in
Dr. Martin Raff
Infectious Disease 56 years experience
Diphtheria: Transmission is most often person-to-person spread from the respiratory tract and can occur from skin lesions or articles soiled with discharges from lesions of infected persons (fomites). Carriers are usually asymptomatic and may be positive for months. Infected persons may be positive for 2-6 weeks untreated.
A 21-year-old member asked:

Docs, usually how long is scabies contagious after treatment?

1 doctor answer1 doctor weighed in
Dr. Robert Jackson
Dermatology 43 years experience
Wait: I would wait until your doctor says everything is okay.
A 39-year-old male asked:

Is brochitis contagious?

1 doctor answer1 doctor weighed in
Dr. Joel Gallant
Infectious Disease 36 years experience
Cold virus: Since bronchitis is usually caused by a cold virus, you might transmit the cold to someone else. That person may then get a cold, with or without bronchitis.

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Last updated Jun 23, 2015

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