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If strep bacteria causes the infection, it can remain contagious for up to 2 weeks without treatment. However, antibiotics can shorten the contagious period and limits to about 24 to 48 hours once the therapy starts. http://health.top54u.com/post/How-Long-is-Tonsillitis-Contagious.aspx

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14y ago
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11y ago

Never when it comes to a cold, flu, or any other virus.

Antibiotics, like is hinted in their name, are only good for fighting bacteria. When fighting bacteria the person should be safe around other people in 24 hrs.

If you do have a virus zinc, echinacea, goldenseal, elderberry extract, garlic, and green vegetables, listed in order of importance, are probably the best way to get better.

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12y ago

According to the Centers for Disease Control, people with flu can spread the virus starting one day before the onset of symptoms, and from five to seven days after.

This period can be longer especially in children, and those who have seriously compromised immune systems.

The rule of thumb given by the CDC during the 2009 pandemic was that once you were fever free for a full 24 hours without taking fever reducing medicines, you were considered no longer contagious and could return to work or school.

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11y ago

Person with cold or flu is said to be infectious 1-3 days before symptoms appear and between 5 to 7 days after the symptoms appear. Some people may shed virus for longer periods. People who contract influenza are most infective between the second and third days after infection.

You are also very infectious when the body temperature is very high.

Children are more infectious than adults just before they develop symptoms until two weeks after infection.

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15y ago

Only your doctor can give you a reliable answer; it's different for different infections.

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12y ago

I've always been told by doctors that a full 24 hours after starting them is when you wouldn't be contagious anymore.

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10y ago

After you have gone a full 24 hours without a fever when measured with a thermometer and while no fever-reducing medicines are being taken.

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Q: How long does an antibiotic take before tonsillitis is not contagious?
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How long is an upper respiratory infection contagious for?

An upper respiratory infection is contagious for as long as the active virus is in your system. Taking an antibiotic will help rid the body of the live virus. You will remain contagious for 24 hours following the first treatment of the antibiotic.


How long is septic tonsilitus contagious for?

Septic tonsillitis, also known as streptococcal tonsillitis, is contagious until the person has been on antibiotics for at least 24-48 hours. It is important to finish the full course of prescribed antibiotics to prevent spreading the infection to others. Close contacts may also need to be evaluated and treated if necessary.


How long do you have before embola becomes contagious?

3 days


How long do you have to be on z-pack before you are not contagious?

Approximately 48 hours.


How long are you contagious for after being diagnosed with strep throat and after you start taking medication?

The germs that caused the virus are still in you and reproducing for most of the time you are on antibiotics. The anitbiotics kill them. As they die, they're numbers dwindle, but are still there, so you are still contagious until all the antibiotic is gone and the doctor confirms the virus is gone. It is important to use all the prescribed antibiotic--to be sure to kill off all the germs. If not, some may be left and start reproducing again, thus you'd have to start all over with the antibiotics.


How long is mono contageous?

The mono virus is contagious before the person even knows they have the illness; this is called the incubation period. It is contagious the whole time the person has mono.


How long are viral infections contagious?

Every virus is different. Some are infectious for only a couple of days; some are infectious until after your body has been buried. Some may be infectious for longer than that; bodies of the victims of the 1917 influenza strain have recently been exhumed, and were discovered to STILL be dangerous.


How long is the 24 hour stomach flu contagious?

How long is the 24 stomach flu contagious for


How long are you contagious if you have mumps?

Very contagious if you haven't been immunized.


How long is strep contagious?

Up to 24 hours after it has been treated with antibiotics. You should stay home from work or school at least 24 hour after receiving an antibiotic shot or starting an oral antibiotic treatment even if you feel better. You should also finish all your antibiotic pills, for the full ten days, even after you feel better to prevent further infection or relapse.


How long does tonsillitis take to heal?

About a week or something like that


How long before child on azrithromycin is not contagious when having strep throat?

The child is considered as contagious for ten days on azithromycin. ( Now that, contributor got the point, as to why strep throat is uncommon in developed countries.)