classification

(noun)

the act of forming into a class or classes; a distribution into groups, as classes, orders, families, etc., according to some common relations or attributes.

Examples of classification in the following topics:

  • The Baltimore Virus Classification

    • The Baltimore classification groups viruses into families depending on their type of genome.
    • Virus classification is the process of naming viruses and placing them into a taxonomic system.
    • Much like the classification systems used for cellular organisms, virus classification is the subject of ongoing debate and proposals.
    • As such, they do not fit neatly into the established biological classification system in place for cellular organisms.
    • List the characteristics of viruses that are useful for Baltimore classification

  • The Taxonomic Scheme

    • Bacterial taxonomy is the rank-based classification of bacteria.
    • In the scientific classification established by Carl von Linné, each distinct species is assigned to a genus using a two-part binary name (for example, Homo sapiens).
    • Despite there being little agreement on the major subgroups of the Bacteria, gram staining results were commonly used as a classification tool.
    • Until the advent of molecular phylogeny the Kingdom Prokaryotae was divided into four divisions, a classification scheme still formally followed by Bergey's manual of systematic bacteriology.The various species differ amongst each other based on several characteristics determined by gram staining, which allowed their identification and classification.
    • Outline the factors that play a role in the classification of bacterial taxonomy

  • Classification of Microorganisms

    • Biologic classification helps identify each form according to common properties (similarities) using a set of rules and an estimate as to how closely related it is to a common ancestor (evolutionary relationship) in a way to create an order.
    • The science of classifying organisms is called taxonomy and the groups making up the classification hierarchy are called taxa.
    • Classification of microorganisms has been largely aided by studies of fossils and recently by DNA sequencing.
    • Methods of classifications are constantly changing.

  • Classification of Microorganisms by Growth Temperature

    • Classification seeks to describe the diversity of bacterial species by naming and grouping organisms based on similarities.
    • The following are the five classifications:

  • Unclassified and Uncultured Bacteria

    • Classification seeks to describe the diversity of bacterial species by naming and grouping organisms based on similarities.
    • While these schemes previously allowed the identification and classification of bacterial strains, it was long unclear whether these differences represented variation between distinct species or between strains of the same species.
    • To overcome these uncertainties, modern bacterial classification emphasizes molecular systematics, using genetic techniques such as guanine cytosine ratio determination, genome-genome hybridization, as well as sequencing genes that have not undergone extensive lateral gene transfer, such as the rRNA gene.
    • If a bacteria can not be cultured, classification can prove to be very difficult.
    • Following present classification, there are a little less than 9,300 known species of prokaryotes, which includes bacteria and archaea.

  • Disease Severity and Duration

    • It gives a medical classification into minor, moderate, major, and extreme that is meant to provide a basis for evaluating hospital resource use or to establish patient care guidelines.
    • The International Classification of Diseases (most commonly known by the abbreviation ICD) is according to its publisher, the United Nations-sponsored World Health Organization, and is considered "the standard diagnostic tool for epidemiology, health management and clinical purposes. " It is known as a health care classification system that provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or disease.
    • Such categories can include a set of similar diseases.The International Classification of Diseases is published by the World Health Organization (WHO) and is used worldwide for morbidity and mortality statistics, reimbursement systems, and automated decision support in health care.
    • This system is designed to promote international comparability in the collection, processing, classification, and presentation of these statistics.
    • The ICD is a core classification of the WHO Family of International Classifications (WHO-FIC).

  • Classification and Identification of Helminths

    • The classification and identification of helminths are dependent on numerous factors including body shape, body cavity, body covering, digestive tubing, sex and type of attachment organs.

  • Classification and Nomenclature

    • Classification is the grouping of organisms into progressively more inclusive groups based on phylogeny and phenotype.
    • Despite there being no official and complete classification of prokaryotes, the names (nomenclature) given to prokaryotes are regulated by the International Code of Nomenclature of Bacteria (Bacteriological Code), a book which contains general considerations, principles, rules, and various notes and advises in a similar fashion to the nomenclature codes of other groups .
    • Recognize the factors involved with general classification and nomenclature used for microorganism classification

  • Nongenetic Categories for Medicine and Ecology

    • Similar to the classification systems used for cellular organisms, virus classification is the subject of ongoing debate due to their pseudo-living nature.
    • Essentially, they are non-living particles with some chemical characteristics similar to those of life; thus, they do not fit neatly into an established biological classification system.
    • Currently there are two main schemes used for the classification of viruses: (1) the International Committee on Taxonomy of Viruses (ICTV) system; and (2) the Baltimore classification system, which places viruses into one of seven groups.
    • Baltimore classification is a system that places viruses into one of seven groups depending on a combination of:
    • Other classifications are determined by the disease caused by the virus or its morphology, neither of which is satisfactory as different viruses can either cause the same disease or look very similar.

  • Phylogenetic Analysis

    • Due to the relatively recent introduction of molecular systematics and a rapid increase in the number of genome sequences that are available, bacterial classification remains a changing and expanding field.
    • While morphological or metabolic differences allowed the identification and classification of bacterial strains, it was unclear whether these differences represented variation between distinct species or between strains of the same species.
    • To overcome this uncertainty, modern bacterial classification emphasizes molecular systematics, using genetic techniques such as guanine cytosine ratio determination, genome-genome hybridization, as well as sequencing genes that have not undergone extensive lateral gene transfer, such as the rRNA gene.
    • As with bacterial classification, identification of microorganisms is increasingly using molecular methods.
    • Following present classification, there are a little less than 9,300 known species of prokaryotes, which includes bacteria and archaea. but attempts to estimate the true level of bacterial diversity have ranged from 107 to 109 total species – and even these diverse estimates may be off by many orders of magnitude.