An opportunist is usually a greedy person who will use every opportunity to be in control of something or someone, or to move up at anyone's expense, usually.
opportunistic infections
opportunistic infection
Opportunistic means to take advantage of someone or any given situation. Another word for opportunistic is conniving. You could also use the words calculating and scheming.
There are many different opportunistic infections and many different ways to treat them.
examples of opportunistic infections of HIV
He had took many chances but being opportunistic had helped to make him very successful in his career.
The symbol for DoubleLine Opportunistic Credit Fund in the NYSE is: DBL.
DoubleLine Opportunistic Credit Fund (DBL)had its IPO in 2012.
How does being opportunistic feeders help coyotes survive in urban areas
Some are, some are not.
opportunist, opportunistic, timeserving
opportunistic feeder