(Redirected from Opportunistic infections) An opportunistic infection is an infection caused by pathogens (bacteria, viruses, fungi, or protozoa) that take advantage of an opportunity not normally available, such as a host with a weakened immune system, an altered microbiota (such as a disrupted gut flora), or breached integumentary barriers.
If someone is described as being 'rough around the edges' it means they are generally good but have a few faults on the outside. Rough around the edges has many meanings: Worn out; Not polished or refined; Not great but not bad either; ans Unkempt.
Also, teeth whiteners give new meaning to the phrase beauty is pain. They are notorious for causing tooth sensitivity. It's usually transient, but can be long-term where it lasts for days, if not weeks, Sung says. How sensitive is too sensitive? Sung offers up a few rules of thumb: If pain lasts for only a few seconds, it's not really an issue. However, if your teeth are sensitive to hot foods and beverages (usually a sign of nerve problems), or if the pain lasts more than a minute or is spontaneous, you've earned yourself a trip to the dentist.