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A classic circular form spider's web Infographic illustrating the process of constructing an orb web. A spider web, spiderweb, spider's web, or cobweb (from the archaic word coppe, meaning 'spider') [1] is a structure created by a spider out of proteinaceous spider silk extruded from its spinnerets, generally meant to catch its prey.
Erwinia is a genus of Enterobacterales bacteria containing mostly plant pathogenic species which was named for the famous plant pathologist, Erwin Frink Smith. It contains Gram-negative bacteria related to Escherichia coli, Shigella, Salmonella, and Yersinia. They are primarily rod-shaped bacteria. Many infect woody plants.
Streptomyces scabiei (also wrongly named Streptomyces scabies) [1] is a streptomycete bacterium species found in soils around the world. [2] Unlike most of the 500 or so Streptomyces species it is a plant pathogen causing corky lesions to form on tuber and root crops as well as decreasing the growth of seedlings.
Cholera (caused by Vibrio cholerae bacteria) and bubonic plague, or the Black Death (caused by the bacterium Yersinia pestis) are some of the most famous examples of how devastating a pandemic can be.
Lesions caused by the plant hypersensitive response HR is commonly thought of as an effective defence strategy against biotrophic plant pathogens , which require living tissue to gain nutrients . In the case of necrotrophic pathogens , HR might even be beneficial to the pathogen , as they require dead plant cells to obtain nutrients .
Caused by bacteria belonging to genus Legionella (90% of cases caused by Legionella pneumophila) Legionella is a very common organism that reproduces to high numbers in warm water; [18] but only causes severe disease when aerosolized. [19] Pontiac fever produces milder symptoms resembling acute influenza without pneumonia.
This is an accepted version of this page This is the latest accepted revision, reviewed on 17 December 2024. Disease caused by Yersinia pestis bacterium This article is about the disease caused by Yersinia pestis. For other uses, see Plague. Medical condition Plague Yersinia pestis seen at 200× magnification with a fluorescent label. Specialty Infectious disease Symptoms Fever, weakness ...
They typically develop within plant cells, causing the infected tissue to grow into a gall or scab. Important diseases caused by phytomyxeans include club root in cabbage and its relatives, and powdery scab in potatoes. [4] These are caused by species of Plasmodiophora and Spongospora, respectively. [5]