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Leptospirosis is a blood infection caused by the bacterium Leptospira [8] that can infect humans, dogs, rodents and many other wild and domesticated animals. [8] Signs and symptoms can range from none to mild (headaches, muscle pains, and fevers) to severe (bleeding in the lungs or meningitis). [5]
The icteric form is also known as Weil's disease. [29] It has been shown in studies that L. interrogans may damage the endothelial cell lining of various vessels and organs, allowing them to leak and further spread the bacteria to other parts of the body. [30] Symptoms can appear anywhere between 2 and 4 weeks after exposure.
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It has long been suspected as a causative agent in Crohn's disease in humans, [4] [5] but studies have been unable to show definite correlation. [6] One study has argued that the presence of antibodies against Mycobacterium avium subspecies paratuberculosis is associated with increased propensity of patients with Crohn's disease to receive ...
An etiological agent of disease may require an independent co-factor, and be subject to a promoter (increases expression) to cause disease. An example of all the above, which was recognized late, is that peptic ulcer disease may be induced by stress, requires the presence of acid secretion in the stomach, and has primary etiology in ...
Theodor Otto Diener (28 February 1921 – 28 March 2023) was a Swiss-American plant pathologist. [1] In 1971, he discovered that the causative agent of the potato spindle tuber disease is not a virus, but a novel agent, which consists solely of a short strand of single-stranded RNA without a protein capsid, eighty times smaller than the smallest viruses.
Drs. Eugeniusz Lazowski and his medical-school friend Stanisław Matulewicz were practicing in the small town of Rozwadów in Poland during World War II.Dr. Matulewicz realized that since Proteus vulgaris strain OX19 was used to manufacture the then-common Weil-Felix antibody-agglutination test for typhus, inoculating villagers with dead Proteus would cause a false positive result without ...
Rickettsia prowazekii is a species of gram-negative, obligate intracellular parasitic, aerobic bacilliform bacteria of class Alphaproteobacteria that is the etiologic agent of epidemic typhus, transmitted in the feces of lice. In North America, the main reservoir for R. prowazekii is the flying squirrel.