Any of various bacteria of the genus Rickettsia, carried as parasites by many ticks, fleas, and lice, that cause diseases such as typhus, scrub typhus, and Rocky Mountain spotted fever in humans.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "rickettsia" in a sentence
"But Infante said the Chilean salmon industry relied on the drugs to fight a particular bacteria, rickettsia, which is carried by sea lice and has long plagued the industry."
"After bacteria I will be doing either viruses, rickettsia, fungi or parasites."
"DESCRIPTION: An infection occurs when the body as a whole or in part is invaded by a pathogenic agent such as a bacteria, virus, parasite, fungi, or rickettsia microorganisms originating from arthropods such as lice, fleas, mosquitoes, or ticks."