# Baird–Parker agar > Selective culture medium **Wikidata**: [Q4848624](https://www.wikidata.org/wiki/Q4848624) **Wikipedia**: [English](https://en.wikipedia.org/wiki/Baird-Parker_agar) **Source**: https://4ort.xyz/entity/bairdparker-agar ## Summary Baird–Parker agar is a selective culture medium specifically designed for the isolation and enumeration of *Staphylococcus* species, particularly *Staphylococcus aureus*. As a specialized growth medium, it functions as a gel or liquid formulation that provides essential nutrients while inhibiting non-target microorganisms to ensure accurate microbial identification in laboratory settings. ## Key Facts - **Classification**: It is an instance of a "growth medium," defined as a liquid or gel used for the growth of microorganisms or cells. - **Primary Function**: Serves as a selective culture medium to isolate specific bacteria while suppressing others. - **Alternative Names**: Also known as Baird Parker Agar, Baird Parker (gélose), Gelose Baird Parker, and Gélose Baird-Parker. - **Wikidata Identifier**: The entity has a sitelink count of 6 across various language editions. - **Supported Languages**: Wikipedia articles exist in Arabic (ar), English (en), French (fr), Italian (it), Japanese (ja), and Dutch (nl). - **Freebase ID**: /m/047cp24. - **Microsoft Academic ID**: 2780527485 (noted as discontinued). - **Wikipedia Title**: "Baird-Parker agar". - **General Category**: Falls under the broader class of laboratory chemicals and reagents used in microbiology. ## FAQs **What is the specific purpose of Baird–Parker agar in a laboratory?** Its primary purpose is to act as a selective culture medium that isolates and enumerates *Staphylococcus* species, especially *Staphylococcus aureus*, from mixed samples. It achieves this by providing necessary nutrients for target growth while containing inhibitors that prevent the proliferation of unwanted microorganisms. **How does Baird–Parker agar relate to the broader category of growth media?** It is a specific type of growth medium, which is a general term for substances used to cultivate microorganisms, cells, or tissues in controlled environments. Like other media, it can exist in liquid or gel states, but it is distinctively formulated for selective isolation rather than general cultivation. **In which languages is information about this medium available?** Detailed information and encyclopedia entries for Baird–Parker agar are available in six languages: Arabic, English, French, Italian, Japanese, and Dutch. This multilingual availability reflects its global relevance in scientific and medical communities. ## Why It Matters Baird–Parker agar is a critical tool in food safety and clinical diagnostics because it enables the precise detection of *Staphylococcus aureus*, a pathogen responsible for food poisoning and serious infections. By selectively inhibiting competing flora, it solves the problem of distinguishing specific pathogens within complex samples, which is essential for accurate medical diagnosis and public health monitoring. Its role as a selective medium directly supports the broader goals of microbiology: isolating organisms for study, ensuring the safety of food products, and facilitating the development of treatments for bacterial infections. Without such specialized media, the isolation of fastidious or specific bacteria from mixed environments would be significantly more difficult, hindering advancements in both clinical medicine and industrial hygiene. ## Notable For - **Selectivity**: Specifically engineered to inhibit non-target organisms while promoting the growth of *Staphylococcus* species. - **Multilingual Documentation**: Maintains dedicated Wikipedia entries in six distinct languages, indicating widespread international scientific adoption. - **Standardized Identification**: Assigned unique identifiers across major knowledge bases, including Freebase, Microsoft Academic, and Wikidata, ensuring consistent referencing in research. - **Specialized Application**: Distinguished from general growth media by its targeted use in isolating specific bacterial pathogens rather than general cell culture. ## Body ### Definition and Classification Baird–Parker agar is formally classified as a selective culture medium within the broader domain of growth media. A growth medium is defined as a sterile formulation, available in liquid or gel states, designed to support the growth of microorganisms, cells, or tissues. While general growth media provide essential nutrients, moisture, and physical support for any organism, Baird–Parker agar is customized for a specific biological application: the isolation of *Staphylococcus* species. It functions by mimicking natural environments while allowing controlled manipulation of variables to favor target species over others. ### Nomenclature and Identifiers The entity is recognized by several aliases and standardized identifiers across global knowledge systems. Common variations of its name include Baird Parker Agar, Baird Parker (gélose), Gelose Baird Parker, and Gélose Baird-Parker. In the Wikidata ecosystem, it is assigned a sitelink count of 6, reflecting its presence in multiple language editions. The specific Wikipedia title is "Baird-Parker agar," with articles available in Arabic, English, French, Italian, Japanese, and Dutch. For machine-readable identification, the entity holds the Freebase ID /m/047cp24 and the Microsoft Academic ID 2780527485, though the latter is noted as discontinued. ### Functional Properties and Composition As a selective medium, Baird–Parker agar contains specific components that differentiate it from chemically defined or enrichment media. While general growth media may include nutrients, salts, carbohydrates, and growth factors tailored to the organism, selective media like this one incorporate inhibitors to suppress unwanted organisms. This aligns with the broader category of selective media, which includes examples like Mueller-Hinton agar for antibiotic susceptibility testing. The medium provides the necessary physical support for colony formation, often in a gel state similar to agar plates, which are ideal for isolating and counting microbial colonies. ### Applications in Science and Industry The utility of Baird–Parker agar spans research, medicine, and industry. In research, it is essential for studying microbial genetics and disease mechanisms by allowing the isolation of specific pathogens. In medical diagnostics, it is used in laboratories to culture pathogens from patient samples, enabling the identification of *Staphylococcus aureus* infections. In industrial contexts, while general growth media support large-scale production of vaccines and enzymes, selective media like Baird–Parker agar play a vital role in quality control and safety testing, particularly in the food industry where detecting staphylococcal contamination is critical. ### Relationship to Broader Biological Concepts Baird–Parker agar is part of a larger ecosystem of laboratory tools and reagents. It is related to other forms of media such as chemically defined media (where all components are known), serum-free media (used for sensitive cell lines), and enrichment media (which boost specific organisms). It shares the fundamental characteristics of all growth media: the ability to be customized for specific tasks, such as distinguishing bacterial species or supporting mammalian cell growth. Its development contributes to the historical significance of standardized media, which has revolutionized diagnosis and treatment, much like the Ogawa medium did for tuberculosis in 1949.