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Mycoplasma host specificity: fact or fiction?

D G Pitcher1, R A J Nicholas

  • 1Respiratory and Systemic Infection Laboratory, Health Protection Agency, 61 Colindale Avenue, London NW9 5HT, UK.

Veterinary Journal (London, England : 1997)
|November 4, 2005
PubMed

Insights

Mycoplasma, the smallest self-replicating bacteria, can infect unusual hosts, potentially causing disease, especially in immunocompromised individuals. This review examines these cross-species infections and their diagnostic implications.

Area of Science:

  • Microbiology
  • Bacteriology
  • Host-Pathogen Interactions

Background:

  • Mycoplasma are the smallest self-replicating bacteria, reliant on host cells for nutrients due to limited metabolic pathways.
  • Generally considered host-specific, Mycoplasma species are increasingly reported in non-native hosts.
  • These host-range expansions can lead to pathological outcomes, particularly in immunocompromised or physiologically compromised hosts.

Purpose of the Study:

  • To review reported incidents of Mycoplasma host-range expansion.
  • To discuss the potential pathological impact of these cross-species infections.
  • To explore the implications for laboratory diagnosis of Mycoplasma.

Main Methods:

  • Literature review of reported Mycoplasma cross-species infections.
  • Analysis of pathological outcomes associated with non-native Mycoplasma hosts.
  • Speculation on diagnostic challenges posed by these events.

Main Results:

  • Compilation of documented cases where Mycoplasma species were found in atypical hosts.
  • Identification of predisposing factors, such as immunodeficiency, exacerbating Mycoplasma infections.
  • Observations of potential disease manifestation in humans and animals with unknown physiological status.

Conclusions:

  • Mycoplasma host specificity may be less absolute than previously assumed.
  • Cross-species Mycoplasma infections represent a potential diagnostic challenge, particularly in vulnerable hosts.
  • Further investigation is needed to understand the full scope and impact of Mycoplasma host-range expansion.

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