C

cereas

Originally a synonym for grain rather than a breakfast convenience food such as muesli or corn flakes, cereal derives from the Latin Cerialia, the Roman festivities honouring the gods of agriculture and growth – particularly the grain goddess Ceres.

CFU

[Abbr. for colony-forming unit] - In biology, a measure of the numbers of fungi or bacteria capable of creating a colony through cell division. 

chromosomes

Chromosome is the name given to the DNA spirally packaged by proteins in eukaryotic cells. A chromosome must be unwound for the replications and transcription process during the cell-division stage.

Clostridia

These are anaerobic, spore-forming, Gram-positive bacteria. Clostridia spores exhibit a very high resistance to thermal disinfecton methods and are able to survive a temperature of 100°C for several hours unharmed. Depending on the various investigation methods used, the LD90 value (UVC254nm) for Clostridia lies between 4.9 ... 23 mJ/cm2.

cocci

Spherical bacteria.

cohesion

The adhering together of molecules within the same substance. 

conidia

Conidia is the technical term for mould spores. See also spores.

conidiophores

Conidiophores are the hyphae forming a mycelium which grows vertically towards the surface and on which the conidia develop. See also mould

conjunctivitis

Also known as ‘pink eye’, conjunctivitis is the medical term for a painful inflammation of the mucous membrane lining the eyelids and white of the eye, associated with reddening and swelling of the conjunctiva as well as increased lachrymation (flow of tears). An infection, allergy or mechanical irritation of the eyes (e.g. from contact lenses) can all cause conjunctivitis. 

contagiousness

Degree of transmissibility of a pathogen via different routes of infection. 

contamination

Here: The rendering unsuitable of biological samples owing to the presence of foreign matter.

convection

Convection is defined as the movement of heat in which the warmed material moves towards the area of lower temperature.

Cross contamination

Direct or indirect transmission of pathogenic microorganisms from contaminated to non-contaminated substances. 

cytoplasma

The gel-like, liquid, organic basic substance, surrounded by the cell membrane, of which a microorganism consists.

cytosine

Cytosine (C4H5N3O) is one of the four complementary coding nucleobases in DNA. Cytosine forms a base pair via three hydrogen bonds with guanine.