Microbiology glossary, terms and definitions from X, Y and Z

Microbiology related glossary, terms and definition from X, Y and Z
Microbiology related glossary, terms, and definition from X, Y, and Z. Created with BioRender.com

Microbiology terms and definitions from X

X-factor definition

  • Substances from the heme fraction of blood hemoglobin. (Microbiology: An Introduction by Tortora, Funke, and Case)

X-ray definition

  • The ionizing radiation that can be used to sterilize objects. (Alcamo’s Fundamentals of Microbiology)

Xenobiotic definition

  • A synthetic compound not produced by organisms in nature. (Brock Biology of Microorganisms)
  • Synthetic chemicals that are not readily degraded by microorganisms. (Microbiology: An Introduction by Tortora, Funke, and Case)

Xenodiagnosis definition

  • A method of diagnosis based on exposing a parasite-free normal host to the parasite and then examining the host for parasites. (Microbiology: An Introduction by Tortora, Funke, and Case)

Xenograft definition

  • A tissue graft between members of different species, such as between a pig and a human. (Alcamo’s Fundamentals of Microbiology)
  • The transfer of a tissue or an organ from an animal of one species to a recipient of another species. (Foundation in Microbiology by Talaro and Chess)
  • A tissue graft from another species. (Microbiology: An Introduction by Tortora, Funke, and Case)
  • A tissue graft between animals of different species. (Prescott’s Microbiology)

Xerophile definition

  • An organism adapted to growth at very low water potentials. (Brock Biology of Microorganisms)
  • Microorganisms that grow best under low water activity (aw) conditions, and may not be able to grow at high aw values. (Prescott’s Microbiology)

Microbiology terms and definitions from Y

Yaws definition

  • A tropical disease caused by Treponema pertenue that produces granulomatous ulcers on the extremities and occasionally on the bone but does not produce a central nervous system or cardiovascular complications. (Foundation in Microbiology by Talaro and Chess)

Yeast definition

  • (1) A type of unicellular, nonfilamentous fungus that resembles bacterial colonies when grown in culture. (2) A term sometimes used to denote the unicellular form of pathogenic fungi. (Alcamo’s Fundamentals of Microbiology)
  • The single-celled growth form of various fungi. (Brock Biology of Microorganisms)
  • Single-celled, budding fungi. (Foundation in Microbiology by Talaro and Chess)
  • Nonfilamentous, unicellular fungi. (Microbiology: An Introduction by Tortora, Funke, and Case)
  • A unicellular, uninuclear fungus that reproduces either asexually by budding or fission, or sexually through spore formation. (Prescott’s Microbiology)

Yeast Artificial Chromosome (YAC) definition

  • A genetically engineered chromosome with yeast origin of replication and centromere sequence. (Brock Biology of Microorganisms)
  • Engineered DNA that contains all the elements required to propagate a chromosome in yeast and is used to clone foreign DNA fragments in yeast cells. (Prescott’s Microbiology)

Yeast infection definition

  • Disease caused by the growth of certain yeasts in a susceptible host. (Microbiology: An Introduction by Tortora, Funke, and Case)

Yellow fever definition

  • Best-known arboviral disease. Yellow fever is transmitted by mosquitoes. Its symptoms include fever, headache, and muscle pain that can proceed to oral hemorrhage, nosebleeds, vomiting, jaundice, and liver and kidney damage. (Foundation in Microbiology by Talaro and Chess)

Microbiology terms and definitions from Z

Zone of inhibition definition

  • The area of no bacterial growth around an antimicrobial agent in the disk-diffusion method. (Microbiology: An Introduction by Tortora, Funke, and Case)

Zoonosis definition

  • An animal disease that may be transmitted to humans. (Alcamo’s Fundamentals of Microbiology)
  • Any disease primarily of animals that is occasionally transmitted to humans. (Brock Biology of Microorganisms)
  • An infectious disease indigenous to animals that humans can acquire through direct or indirect contact with infected animals. (Foundation in Microbiology by Talaro and Chess)
  • A disease that occurs primarily in wild and domestic animals but can be transmitted to humans. (Microbiology: An Introduction by Tortora, Funke, and Case)
  • A disease that can be transmitted from animals to humans. (Prescott’s Microbiology)

Zooplankton definition

  • The collection of nonphotosynthetic microorganisms (protozoa, tiny animals) that float in the upper regions of aquatic habitat and together with phytoplankton comprise the plankton. (Foundation in Microbiology by Talaro and Chess)

Zoospore definition

  • An asexual algal spore; has two flagella. (Microbiology: An Introduction by Tortora, Funke, and Case)

Zooxanthella definition

  • A dinoflagellate found living symbiotically within cnidarians (corals) and other invertebrates. (Prescott’s Microbiology)

Zygomycetes definition

  • A group of fungi that usually has aseptate hyphae. Sexual reproduction normally involves the formation of zygospores. (Prescott’s Microbiology)

Zygomycota definition

  • A phylum of fungi whose members have coenocytic hyphae and form zygospores, among other notable characteristics. (Alcamo’s Fundamentals of Microbiology)

Zygospore definition

  • A sexually produced spore formed by members of the Zygomycota. (Alcamo’s Fundamentals of Microbiology)
  • A thick-walled sexual spore produced by the zygomycetes fungi. It develops from the union of two hyphae, each bearing nuclei of opposite mating types. (Foundation in Microbiology by Talaro and Chess)
  • A sexual fungal spore characteristic of the zygomycetes. (Microbiology: An Introduction by Tortora, Funke, and Case)
  • A thick-walled, sexual, resting spore characteristic of the zygomycetes fungi. (Prescott’s Microbiology)

Zygote definition

  • In eukaryotes, the diploid cell resulting from the union of two haploid gametes. (Brock Biology of Microorganisms)
  • A diploid cell produced by the fusion of two haploid gametes. (Microbiology: An Introduction by Tortora, Funke, and Case)

References and Sources

  1. Alcamo’s Fundamentals of Microbiology
  2. Brock Biology of Microorganisms
  3. Foundation in Microbiology by Talaro and Chess
  4. Microbiology: An Introduction by Tortora, Funke, and Case
  5. Prescott’s Microbiology

3 thoughts on “Microbiology glossary, terms and definitions from X, Y and Z”

  1. it is not displaying any kind of notes except the title and references in microbiology terms topic please resolve the problem asap
    thank you

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