Detection of NheA from Bacillus spp. in food and soil isolates using real-time and rep-PCR

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dc.contributor.advisor McKillip, John L.
dc.contributor.author Beer, Matthew R.
dc.date.accessioned 2011-08-05T17:46:20Z
dc.date.available 2011-08-06T05:30:06Z
dc.date.created 2011-06-23
dc.date.issued 2011-06-23
dc.identifier.citation http://liblink.bsu.edu/catkey/1656302
dc.identifier.uri http://cardinalscholar.bsu.edu/handle/123456789/194911
dc.description.abstract Bacillus cereus is traditionally thought to be the only member of its genus accepted as a pathogen in foods like grains, fruits, vegetables and milk due to the presence of the nonhemolytic (Nhe) operon. However, many other Bacillus spp. may also harbor the Nhe operon and be pathogenic. Real-time PCR targeted the nheA gene in 37 samples obtained from food, soil, and reference cultures by analyzing the standard deviations of melt peaks. Rep-PCR was used to compare the banding patterns of each sample against B. cereus ATCC14579 and three B. thuringiensis strains to “fingerprint” each isolate. Of the original 43 isolated tested, 37 were Gram-positive rods. The remaining six samples were Gram-positive cocci. Twenty-five of the 37 Gram-positive Bacillus spp. were nheA positive, while twelve were negative. Many of the nheA positive strains were species not previously known to contain Nhe, and were capable of causing gastroenteritis in consumers.
dc.description.sponsorship Department of Biology
dc.subject.lcsh Enterotoxins.
dc.subject.lcsh Bacillus (Bacteria) -- Genetics.
dc.subject.lcsh Bacillus (Bacteria) -- Identification.
dc.subject.lcsh Polymerase chain reaction.
dc.subject.lcsh Food contamination -- Testing.
dc.subject.lcsh Soil pollution -- Testing.
dc.title Detection of NheA from Bacillus spp. in food and soil isolates using real-time and rep-PCR en_US
dc.title.alternative Detection of non-hemolytic enterotoxin A from Bacillus spp. in food and soil isolates using real-time and rep-polymerase chain reaction
dc.description.degree Thesis (M.S.)
dc.date.liftdate 2011-08-06


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  • Master's Theses [5454]
    Master's theses submitted to the Graduate School by Ball State University master's degree candidates in partial fulfillment of degree requirements.

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