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Doctor insights on: Mono Infectious Mononucleosis

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Dr. Al Hegab Dr. Hegab
3 doctors agreed:
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Can infectious mononucleosis (mono test negative- but antibodies positive- I had it in the past) be the reason for increased TSH? is T4 necessary?

Dr. Al Hegab Dr. Hegab
3 doctors agreed:
Can infectious mononucleosis (mono test negative- but antibodies positive- I had it in the past) be the reason for increased TSH? is T4 necessary?

Unrelated: and T4 / free T4 is necessary if you have abnormal TSH reading, however, clinical context is more important, the doctor who ordered the tests is the best to judge which way to go, good luck ...Read more

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Dr. Heidi Fowler
399 doctors shared insights

Infectious Mononucleosis (Definition)

Mononucleosis is a viral disease caused by EB Epstein Barr virus. It can last 10-14 days even up to weeks and become chronic on occasion. A mono assay test can reveal if present and on an CBC can see nucleated or atypical lymphocytes. Sore throat, fatigue, fevers are the main symptoms. Treatment remains bedrest, fluids and Advil 400 mg po q 6 hrs until no symptoms occur. Reg ...Read more


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I had infectious mononucleosis when I was 17. I have a friend who now has mono, can I catch it?

I had infectious mononucleosis when I was 17. I have a friend who now has mono, can I catch it?

No! : No! you can acquire eb only once. Viral illnesses with similar sx do not count. Chronic mono excluded! ...Read more

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Help please? I want to know what are the infectious stages of mono?

Help please? I want to know what are the infectious stages of mono?

Mono: This very common illness can be infectious for a lifetime. Most people have antibodies against mono and may never get symptoms. People often carry the mono virus in their mouths for a lifetime. One need not be 'actively' sick with mono to carry and transmit this virus. ...Read more

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Hello, I recovered from Mono about 8/9 months ago. What is the likelihood of me still being infectious? Thanks!

Hello, 
I recovered from Mono about 8/9 months ago.  What is the likelihood of me still being infectious?    
Thanks!

Minimal but possible: The primary infectious period lasts a few weeks in most, a few months in a few. However, the primary cause is a viruses that can hibernate in your system for years and shed intermittently. It usually doesn't matter because most adults had the illness when younger and retain immunity. ...Read more

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I had infectious mono as a child.Can it reoccur and does it weaken immune systems for life? Ty

Yes: It is possible to catch it again. It does weaken the immune system, however the weakness can last anywhere between a couple weeks to a couple months. You will feel tired and weak. ...Read more

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My friend got mono and she keeps on relapsing, her symptoms come back and she becomes infectious again. Is this normal? Will this keep happening?

My friend got mono and she keeps on relapsing, her symptoms come back and she becomes infectious again. Is this normal? Will this keep happening?

Unusual.: It is unusual for a person with mono to get completely better and then sick again with the same EBV virus. Your friend should see her doctor and determine what is going on. Unfortunately we can't provide any more information on this forum. It is great that you are concerned for your friend, though. ...Read more

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Blood test just confirmed that the mono virus has reactivated in my body. What do I do now? And am i contagious?

Blood test just confirmed that the mono virus has reactivated in my body. What do I do now? And am i contagious?

Probably not: The monovirus (ebv) can remain in blood cells from which it can reactivate. This is detected by testing ebv dna or "viral load" in the blood and blood cells. In patients with some immune problems this can lead to problems. Otherwise, the body should control the reactivation and it should remain in the blood (and not in your nose/throat) and you are unlikely to be contageous. ...Read more

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18yo with mono w complications. In hospital x1wk. Out of hospital x1wk and wants to travel and visit relatives for holiday. Advisable? Contagious?

18yo with mono w complications. In hospital x1wk. Out of hospital x1wk and wants to travel and visit relatives for holiday. Advisable? Contagious?

Maybe: Consider the most contagious period to be the first three weeks after symptoms start, with less for the first 3 months,then intermittently for years.Most adults are not susceptible having had it as kids. Travel plans should best be reviewed with the treating doc, who has more specific information. ...Read more

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Is mono contagious?

Is mono contagious?

Yes: Mono -also known as the kissing disease - is contagious. It's spread through spit (liking sharing eating utensils and ... Kissing). ...Read more

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How long is mono contagious?

How long is mono contagious?

Until better: Most viral infections, including mono, are infectious most at the outset, even before you fall ill. Once you are feeling better, you are usually no longer infectious. ...Read more

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I'm wondering how long is mono contagious for?

I'm wondering how long is mono contagious for?

Variable: Most are contagious for 2-3 weeks, a few up to 3 months. Rarely a person can shed the germ in saliva off and on for years. Segregation during the active phase is often considered adequate.(2-3 wks). ...Read more

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Is mono contagious after the symptoms are gone?

Yes, it can be.: If you have mononucleosis the fever usually resolves within about 10 days. Swelling of lymph nodes & organs usually resolves within about a month. You may have fatigue from several weeks to several months. You may be contagious for several months (even if asymptomatic). ...Read more

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Is mono contagious to others that you don't kiss?

Is mono contagious to others that you don't kiss?

Fomites: Items contaminated with oral secretions/fluid can transmit the infection, without kissing. ...Read more

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Are you contagious during incubation prriod of mono?

Complicated: Probably not infectious during the 4-7 week of incubation of the virus in your system because you are in the process of becoming infected with the virus. It has not yet taken hold of your system . After that, it can surface with symptoms or no symptoms at all and you can pass it on to others in your saliva. ...Read more

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Should I go to work if I have mono? How contagious is it?

Should I go to work if I have mono? How contagious is it?

Mononucleosis: Mononucleosis is a viral infection (EBV) that can cause extreme fatigue, sore throat, cough, abdominal pains, headaches, swollen lymph nodes and other symptoms. Spleen enlargement is an uncommon but serious possibility. EBV is a lifelong infection, but usually remains silent. Viral shedding is at it's peak just before symptoms start and until fever resolves and you are not feeling as ill. ...Read more

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I have a friend hrs has mono. Do I need to stay a way from her? Is contagious ?

Depends: Most adult mono patients will shed virus in their saliva for 2-3 weeks and some longer. The virus can live for some time on surfaces outside the body.The role of any airborne material is unknown but likely minimal. If the contact with the person is social but not intimate, and routine hand washing is practiced, I see no reason to isolate this person. ...Read more

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Can a doctor to determine if someone is still contagious with mono?

Can a doctor to determine if someone is still contagious with mono?

Sometimes: The most infectious period of mononucleosis is within the first few weeks of the illness. As you feel better and your antibodies rise against the epstein barr virus (ebv), you become less contagious. However, ebv remains in the body for life. At times the virus may be shed when you are well and at times it can be passed on with a recurrence of illness. The contagious period is indefinite. ...Read more

Dr. Michael Ein
785 doctors shared insights

Mono (Definition)

Infectious mononucleosis, also known as mono, is a contagious illness caused by the Epstein-Barr virus. Symptoms include fever, fatigue, sore throat, enlarged lymph nodes, and enlarged spleen. It is spread via saliva, hence its ...Read more


Contagious (Definition)

One is able to transmit an infection to another by ...Read more