All antibiotics existing nowadays can be divided into two classes. These include the following:
Broad-spectrum antibiotics can effectively kill both gram-negative and gram-positive bacteria;
Narrow-spectrum antibiotics target only a particular type of bacteria.
The appearance of https://antibioticsonlinerx.com/ antibiotics in the medical sphere has greatly shaped the way medicine handles various diseases. Some diseases could not be treated previously, while today they are easily manageable with the help of antibiotics that prevent the growth of harmful microorganisms. However, some of the old types of antibiotics are not effective in the modern conditions because certain bacteria have become resistant to the chemical substances, and this means that scientists should constantly look for new formulas that would be effective to manage different diseases.