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Matière vivante, Bactéries
Les spécimens vivants sont utilisés dans une grande variété d’études, notamment pour observer les effets physiologiques des médicaments sur le rythme cardiaque d’un spécimen, l’effet de la température sur le métabolisme, la locomotion des micro-organismes, ainsi que pour étudier la respiration des plantes, la photosynthèse, la plasmolyse et plus encore. Les cultures d’algues forment des colonies cellulaires très faciles à visualiser, ce qui permet de mieux comprendre les parois cellulaires et les plastes. De nombreux spécimens vivants se reproduisent rapidement, ce qui facilite un enchaînement rapide des tests successifs.
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Ward's® Live Escherichia coli, Lactose Negative Culture
Escherichia coli - Lactose neg
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Ward's® Live Morganella morganii (Proteus morganii) Culture - PATHOGEN
Isolated from human intestine, this organism is known for its distinctive putrefactive odor.
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Ward's® Live Providencia stuartii (Proteus inconstans group B) Culture
All microbial cultures undergo an extensive quality control program prior to releasing for sale, so they are guaranteed for purity as well as for species.
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Ward's® Live Serratia liquefaciens Culture
Colorless, most widely dispersed of the Serratia species.
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Ward's® Live Neisseria flava Culture
Isolated from human nasopharynx. Presumably not related to N. sicca; some relation to N. gonorrhoeae. Often agglutinates in saline.
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Ward's® Live Rhizobium leguminosarum Culture
Nitrogen fixation, produces nodules on legume roots. Bacteroids from nodules can be X, Y, and club shapes.
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Ward's® Live Pseudomonas putida Culture
From soil and water rich in minerals. Organism of putrefaction.
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Ward's® Live Salmonella enteritidis Culture - PATHOGEN
Frequent human isolate. Causes gastroenteritis.
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Ward's® Live Shigella flexneri Culture - PATHOGEN
From sewage and human intestine. Causes dysentery.
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Ward's® Live Escherichia coli JM101 (Host) Culture
E. coli with JM101 can be transformed with pUC8 plasmid to become resistant to Ampicillin and to metabolize lactose