A coccobacillus (plural coccobacilli), or bacilluscocco, is a type of bacterium with a shape intermediate between cocci (spherical bacteria) and bacilli (rod-shaped bacteria). Coccobacilli, then, are very short rods which may be mistaken for cocci.[1]

Haemophilus influenzae, Gardnerella vaginalis, and Chlamydia trachomatis are coccobacilli. Aggregatibacter actinomycetemcomitans is a Gram-negative coccobacillus prevalent in subgingival plaques. Acinetobacter strains may grow on solid media as coccobacilli. Bordetella pertussis is a Gram-negative coccobacillus responsible for causing whooping cough. Yersinia pestis, the bacterium that causes plague, is also coccobacillus.[2]

Coxiella burnetii is also a coccobacillus.[3] Bacteria from the genus Brucella are medically important coccobacilli that cause brucellosis. Haemophilus ducreyi, another medically important Gram-negative coccobacillus, is observed in sexually transmitted disease, chancroid, of Third World countries.[4]

References

  1. Tankeshwar, Acharya (April 11, 2016). "Gram-Negative Cocci and Coccobacilli of Medical Significance; List of Bacteria and Diseases".
  2. Collins, Frank M. (1996). "Pasteurella, Yersinia, and Francisella". In Baron, Samuel (ed.). Medical microbiology (4 ed.). University of Texas Medical Branch at Galveston. ISBN 978-0-9631172-1-2. PMID 21413268.
  3. Walters, Sherry. Thacker, Leon (ed.). "Q-fever (Coxiella burnetti) Zoonoses: An historical and persistent rickettsial disease". Purdue University Animal Disease Diagnostic Laboratory.
  4. Schaechter, Moselio; DiRita, Victor J.; Dermody, Terence (2007). Schaechter, Moselio; Engleberg, N. Cary (eds.). Schaechter's Mechanisms of Microbial Disease (4 ed.). Philadelphia, Pa.: Lippincott Williams & Wilkins. p. 666. ISBN 978-0-7817-5342-5.


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