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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 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 Bacillus subtilis Culture
This organism is commonly isolated in soil and produces antibiotics such as bacitracin, subtilisin, and mycobacillin.
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Ward's® Live Corynebacterium xerosis 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® Kocuria rosea
This organism is commonly isolated from soil or water, and produces a pink or rose colored pigment.
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Ward's® Live Salmonella typhimurium, Ames Test Strain Culture - PATHOGEN
Ames test strain for detecting carcinogens. Causes infection in humans.
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Ward's® Live Shigella sonnei Culture - PATHOGEN
isolated from human intestine. Lactose positive and sucrose positive after a few days’ growth. Causes a mild form of dysentery.
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Ward's® Live Mycobacterium phlei Culture - PATHOGEN
This pathogenic organism is sometimes isolated from hay and grass.
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Ward's® Live Staphylococcus epidermidis Culture
This organism is normal flora of human skin.
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Ward's® Live Streptococcus salivarius Culture
Normal flora of the mouth and throat. Lancefield group K, gamma hemolysis.