What is a reference strain?

Proposed by:

Type strain. Type strain is the strain, which was used when the species was described for the first time and which was selected by the author as the type strain. A strain designation including superscript T (e.g. B78T) shows the the strain is a type strain.

Subsequently, question is, what is reference culture? Most reference cultures are organisms that originated in nature (not genetically modified or artificially selected) that have had particular aspects (growth characteristics, biochemical behaviour and/or genome) characterized.

Hereof, what is meant by strain of bacteria?

In microbiology or virology, a strain is a genetic variant or subtype of a micro-organism (e.g., virus or bacterium or fungus). For example, Escherichia coli is a well studied bacterium and encompasses an enormous population of bacteria that exhibit a very high degree of both genetic and phenotypic diversity.

What is a control strain?

Control strains include susceptible strains to monitor test performance (not for the interpretation of susceptibility), and resistant strains to confirm that the method will detect particular mechanisms of resistance, for example, Haemophilus influenzae ATCC 49247 is a β-lactamase negative, ampicillin resistant strain

What are the 3 types of strain?

In response to stress, rock may undergo three different types of strain – elastic strain, ductile strain, or fracture. Elastic strain is reversible.

What do you mean strain?

1 : an act of straining or the condition of being strained: such as. a : bodily injury from excessive tension, effort, or use heart strain especially : one resulting from a wrench or twist and involving undue stretching of muscles or ligaments back strain. b : excessive or difficult exertion or labor.

What does ATCC stand for?

American Type Culture Collection

How many strains of bacteria are there?

Types of Bacteria. There are seven main groups of bacteria, distinguished by their shape and the type of cell wall they possess. Four of the seven types make up the majority of all bacteria: Gram positive cocci.

How are stress and strain different?

Stress is a force acting on a rock per unit area. Stress can cause strain, if it is sufficient to overcome the strength of the object that is under stress. Strain is a change in shape or size resulting from applied forces (deformation). Rocks only strain when placed under stress.

What is strain improvement?

Strain improvement is aTechnology of manipulating and improving microbial strains in order to enhancemetabolic capabilities. The directed improvement of productformation or cellular properties through modifications of specific biochemicalpathways or by introduction of new pathways using recombinant DNA technology.

What are types of species?

In zoological nomenclature, a type species (species typica) is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). A similar concept is used for suprageneric groups called a type genus.

What is bacterial strain in microbiology?

A strain is a genetic variant or subtype of a microorganism (e.g., virus or bacterium or fungus). Microbial strains can also be differentiated by their genetic makeup using metagenomic methods to maximize resolution within species.

Why are some strains of bacteria harmless?

In most situations, S. aureus is harmless. However, if it enters the body through a cut in the skin, it can cause a range of mild to severe infections, which may cause death in some cases.

What is strain selection?

strain selection. the means of obtaining desired STRAINS, such as desired MUTANTS (from a MUTATION programme) or desired recombinant clones (formed by GENETIC ENGINEERING), by distinguishing them generally on the basis of one or more specific PHENOTYPES.

How are bacterial strains identified?

Bacteria are identified routinely by morphological and biochemical tests, supplemented as needed by specialized tests such as serotyping and antibiotic inhibition patterns. Newer molecular techniques permit species to be identified by their genetic sequences, sometimes directly from the clinical specimen.

What is production strain?

Production Strain means recombinant yeast or some other microbial agent that has been genetically engineered to make a desired compound or product by means of a fermentation process. Sample 2. Production Strain means any Narrow Production Strain and/or any Broad Production Strain.

How do bacteria defend themselves?

Bacteria can defend themselves against infection by bacteriophages using an adaptive immune system called CRISPR-Cas. CRISPR-Cas works through the incorporation of small pieces of DNA (“spacers”), taken from the infecting phage, into a specific spot on the bacterial genome, the so-called CRISPR-locus.

What is a species of bacteria?

Bacterial species is defined as “genomically coherent group of organisms”. A species must have a type strain that is live. Anyone can obtain this strain for taxonomic study.