KEY Scientific Method in Action – The Discovery of Penicillin
... kind of bacteria that was being grown in Petri dishes. That’s when he noticed the penicillin mold that was also growing in some of the culture dishes. There was a clear area around the penicillin because the bacteria that had grown here had died. But there were no clear areas in the dishes without p ...
... kind of bacteria that was being grown in Petri dishes. That’s when he noticed the penicillin mold that was also growing in some of the culture dishes. There was a clear area around the penicillin because the bacteria that had grown here had died. But there were no clear areas in the dishes without p ...
Slide 1
... protect them from infections. If they lose their slime, they soon get infected scales. We want to know if fish slime contains chemicals which might make useful antibiotics for people. ...
... protect them from infections. If they lose their slime, they soon get infected scales. We want to know if fish slime contains chemicals which might make useful antibiotics for people. ...
Legionnaires' disease
Legionnaires' disease, also known as legionellosis or Legion fever, is a form of atypical pneumonia caused by any type of Legionella bacteria. Over 90% of cases of Legionnaires' disease are caused by Legionella pneumophila.Other causative species include L. longbeachae, L. feeleii, L. micdadei, and L. anisa. These species cause a less severe infection known as Pontiac fever, which resembles acute influenza. These bacterial species can be water-borne or present in soil, whereas L. pneumophila has only been found in aquatic systems, where it is symbiotically present in aquatic-borne amoebae. It thrives in temperatures between 25 and 45 °C (77 and 113 °F), with an optimum temperature of 35 °C (95 °F). During infection, the bacterium invades macrophages and lung epithelial cells and reproduces within the infected cells.