Possessive Nouns. Possessive nouns are used to indicate ownership. Possessive nouns usually are formed by adding an apostrophe (') and s. When a noun is plural and ends in s, just add an apostrophe ('). If two people own one thing, add the apostrophe and s to the second person only. If two people own separate things, add the apostrophe and s for each person.
Types of antibiotics. There are hundreds of different types of antibiotics, but most of them can be broadly classified into six groups. These are outlined below. Penicillins (such as penicillin and amoxicillin) â widely used to treat a variety of infections, including skin infections, chest infections and urinary tract infections.
Antibiotics are grouped into families of similar types. Bacteria also are put together in groups of similar types, such as streptococcus or E. coli. Certain types of bacteria are especially susceptible to particular classes of antibiotics. Treatment can be targeted more precisely if your doctor knows what type of bacteria you're fighting. Antibiotics are usually reserved for bacterial infections, because these types of drugs have no effect on illnesses caused by viruses. But sometimes it's difficult to tell which type of germ is at work.