Crossword clues for rickettsia
Douglas Harper's Etymology Dictionary
parasitic organism, 1919, named 1916 in Modern Latin by H. da Rocha-Lima in honor of U.S. pathologist H.T. Ricketts (1871-1910), who first identified it in 1909 and died of typhus as a result of his contact with it, + abstract noun ending -ia. The bacteria causes typhus and Rocky Mountain spotted fever, but is unrelated by pathology or etymology to rickets (q.v.), which is the result of vitamin D deficiency. The surname is a development from Rickard, variant of Richard, or else from the diminutive form Ricot.
Wiktionary
n. Any of a group of gram-negative bacteria, of the genus ''Rickettsia'', carried as parasites by ticks, fleas and lice; they cause typhus and other diseases
Wikipedia
Rickettsia is a genus of nonmotile, gram-negative, nonspore-forming, highly pleomorphic bacteria that can present as cocci (0.1 μm in diameter), rods (1–4 μm long), or thread-like (10 μm long). The term rickettsia, named after Howard Taylor Ricketts, is often used interchangeably for any member of the Rickettsiales. Being obligate intracellular parasites, the Rickettsia survival depends on entry, growth, and replication within the cytoplasm of eukaryotic host cells (typically endothelial cells). Rickettsia cannot live in artificial nutrient environments and is grown either in tissue or embryo cultures; typically, chicken embryos are used: a method developed by Ernest William Goodpasture and his colleagues at Vanderbilt University in the early 1930s.
Rickettsia species are transmitted by numerous types of arthropod, including chigger, ticks, fleas, and lice, and are associated with both human and plant disease. Most notably, Rickettsia species are the pathogen responsible for: typhus, rickettsialpox, Boutonneuse fever, African tick bite fever, Rocky Mountain spotted fever, Flinders Island spotted fever and Queensland tick typhus (Australian tick typhus). Despite the similar name, Rickettsia bacteria do not cause rickets, which is a result of vitamin D deficiency. The majority of Rickettsia bacteria are susceptible to antibiotics of the tetracycline group.
Usage examples of "rickettsia".
There is a class of things called Rickettsia which are smaller still and may not be bacteria at all, and there are viruses.
Based on our current level of knowledge, at least seventy different types of bacteria, viruses, rickettsiae, and fungi can be weaponized.
This has to be something more like some of the rickettsiae, with some enyzmatic mechanisms intact so it can feed and reproduce from material it can absorb from the body fluids, outside the cells.