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Based on my own test, Shigella flexneri tests negative for the citrate test.
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∙ 12y ago
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How can you differentiate Serratia marcescens and Shigella flexneri as an unknown?
A simple test you can perform is the Citrate test, Serratia marcensens is Citrate positive while Shigella flexneriis citrate negative.Also Serratia Marcensens is motile and Shigella flexneri is non motile if you have already done a Hydrogen Sulfide test you would have been able to already determine between the two.Also Serratia marcensens is VP positive while Shigella flexneri is negative.Serratia marcensens is lipase positive and Shigella flexneri is lipase negativeAnother distinguishing characteristic is that Serratia marcensens grows a distinct red color pigmentation the Shigella flexneri does not have.(These are all according to Bergeys Manual of Systematic bacteriology)
What is the positive organism for citrate utilization test?
The positive test control organism for citrate utilization test is Klebsiella pneumoniae
Does serratia test negative for citrate?
No, Serratia and Klebsiella test positive for citrate. E.Coli tests negative.
Is Morganella morganii positive for a citrate test?
M. Morganii is citrate negative
Bacillus cereus have a positive reaction for VP and citrate?
The B.cereus has a positive citrate test and a negative Voges Proskauer.
Citrate test result for Pseudomonas aeruginosa?
citrate result is positive in case of pseudomonas aeroginosa. slant and butt both will be positive
What is the result of citrate test for bacillus subtilis?
blue/positive
What are the results for klebsiella pneumoniae in the citrate utilization test?
Positive
Is staphylococcus epidermidis citrate positive?
Staphylococcus Epidermidis does return a gram positive result on the citrate lab test. Gram stains will produce these results on slides.
What does the citrate metabolic test test for?
it tests the ability of a bacteria to use citrate as its sole carbon source. if its positive, it will raise the pH and there will be no acid in the end product.
Is shigella positive for nitrate?
yes
Citrate utilization test?
The test indicates if an organism utilizes Citrate as it's only source of Carbon. Positive results will show growth on slant as well as changing the medium from green to blue (ph indicator)
