(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.
Surface roughness. Surface roughness indicates the state of a machined surface. For example, when representing the surface of a component, surface roughness can be examined by eye or rubbed with a fingertip.Expressions used to describe surface roughness include shiny and pretty, lusterless and rough, like oxidized silver, or like a mirror..Those differences are caused by the differences in the irregularities of the component surfaces.urface roughness. Surface roughness indicates the state of a machined surface. For example, when representing the surface of a component, surface roughness can be examined by eye or rubbed with a fingertip.