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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 Neisseria sicca Culture
Isolated from human nasopharynx, saliva, and sputum. Spontaneously agglutinates in saline.
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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 Klebsiella pneumoniae Culture - PATHOGEN
Noted for capsular swelling. Causes pneumonia and urinary tract infections.
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Ward's® Live Halobacterium salinarium Culture
Red-pigmented halophile from evaporating salt ponds; requires 25% salt medium, lyses easily in plain water, releasing DNA.
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Ward's® Live Proteus mirabilis Culture - PATHOGEN
Isolated from sewage, human intestines, and urinary tract infections. Spreading colonies are seen on agar growth medium.
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Ward's® Moraxella catarrhalis
Normal flora of respiratory tract. Beta-lactamase positive. Also known by the name Branhamella catarrhalis
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Ward's® Live Serratia marcescens Cultures: Strain 933 and Strain WCF
Both of these strains of Serratia marcescens are colorless mutants when plated alone, but when grown together, they produce a red pigment.
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Ward's® Live Escherichia coli (non-muccoid) Culture
Used for culturing Dictyostelium discoideum (cellular slime mold).
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Ward's® Live Aquaspirillium itersonii 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.