No. There is no vaccine available for strep throat. However, one should take the annual flu vaccine to prevent the flu. Mild cases of the flu can look like strep throat, with some fever, nausea, and sore throat. If one takes the flu vaccine, he usually won't catch the flu. So, he is less likely to end up at the doctor's office with mild flu symptoms, trying to see if he has the flu, strep, or a cold.
No. There is not.
No. Although research is under way, there is currently no vaccination that prevents strept throat.
None, but... Strep throat is only mildly contagious, and once you've been diagnosed and hopefully treatment has begun, risk of transmission is minimal. Be sure you do get it treated, as there's a danger to the kidneys later and even more serious to the heart. Rheumatic fever is a devastating disease preventable by treating strep throat.
Up to 2 days. Generally if it hasn't grown in 2 days or less then it is not going to. A throat culture would be considered negative after no growth in 48 hours.
Yes, Yes and No. Rheumatic fever is a possible consequence of untreated strep throat. An anaphylactic reaction is a severe allergic response and not related to the other two.
Yes and no. Rheumatic fever is a sequella of a group a streptococcal infection such as pharyngitis. An anaphylactoid reaction is one that mimics a true anaphalytic reaction but has nothing to do with the other 2 conditions you listed.
Yes and no. Rheumatic fever is a post-infectious immune response to group a streptococcus. The purpose of taking antibiotics is to prevent further spread of the infection to others as well as to stop the immune cycle.
Not by itself. Thankfully, real rheumatic fever is relatively uncommon these days. However, when it is diagnosed, a round of antibiotics are often started to be sure the germ is purged from the system. The more specific treatment will depend on the intensity of the disease. The patient is usually hospitalized and treated with anti-inflammatories while being monitored closely.