Vancomycin, long considered a "drug of last resort," kills by preventing bacteria from building cell walls. It binds to wall-building protein fragments called peptides, in particular those that end with two copies of the amino acid D-alanine (D-ala).
The main types of antibiotics include: Penicillins - for example, phenoxymethylpenicillin, flucloxacillin and amoxicillin. Cephalosporins - for example, cefaclor, cefadroxil and cefalexin. Tetracyclines - for example, tetracycline, doxycycline and lymecycline.
Bacterial infections are treated with antibiotics such as amoxicillin, erythromycin and ciprofloxacin.
There is no one type of antibiotic that cures every infection. Antibiotics specifically treat infections caused by bacteria, such as Staph., Strep., or E. coli., and either kill the bacteria (bactericidal) or keep it from reproducing and growing (bacteriostatic). Antibiotics do not work against any viral infection.
The most deadly bacterial disease contracted by human beings is mycobacterium tuberculosis, the world's leading infectious disease with more than 1,700,000 deaths per year. As much as 13% of cases are resistant to most antibiotics, and about 6% are resistant or unresponsive to essentially all treatment.
Penicillin is the most widely prescribed of all antibiotics, usually in the form of amoxicillin.
The highest division between antibiotics is bactericidal and bacteriostatic. Bactericidals kill bacteria directly, whereas bacteriostatics prevent them from dividing. However, these classifications are based on laboratory behavior.
Amoxicillin or amoxicillin/clavulanate is the recommended first-line therapy. Macrolides such as azithromycin are not recommended due to high levels of Streptococcus pneumoniae antibiotic resistance (~40%).
Some classes of antibiotics are generally considered safe, such as penicillins and cephalosporins. You should avoid certain antibiotics, like tetracyclines and fluoroquinolones, in pregnancy. You should only take them if they're your only practical option.
Viruses are germs different from bacteria. They cause infections, such as colds and flu. However, antibiotics do not treat infections caused by viruses.
Augmentin would be considered stronger than amoxicillin for treating infections caused by strains of bacteria that produce beta-lactamase.
Enterobacteriaceae, such as Klebsiella pneumoniae and Escherichia coli (E. coli) can cause serious infections of the urinary tract, bloodstream and wounds, and can also cause pneumonia. These infections are becoming difficult to treat because some bacteria have become resistant to all or most available antibiotics.
You're usually no longer infectious 24 hours after starting a course of antibiotics, but this time period can sometimes vary. For example, the antibiotics may take longer to work if your body takes longer to absorb them, or if you're taking other medicine that interacts with the antibiotics.
How are antibiotic-resistant bacterial infections treated? If an infection shows signs of antibiotic resistance, your healthcare provider may try a different drug. The new drug may have more severe side effects, and trying a different antibiotic also raises the risk of developing resistance to that drug.
Antibiotics are only needed for treating certain infections caused by bacteria, but even some bacterial infections get better without antibiotics.
Antibiotics begin to work right after you start taking them. However, you might not feel better for 2 to 3 days. How quickly you get better after antibiotic treatment varies. It also depends on the type of infection you're treating.