E. coli - Science Media Centre of Canada
... are through food, and 15 per cent from contaminated drinking water. The most common food vectors are ground beef and produce. The harmless forms of E. coli actually serve a purpose in the gut; they fight other, very harmful bacteria like Salmonella and can help break down carbohydrates for digestion ...
... are through food, and 15 per cent from contaminated drinking water. The most common food vectors are ground beef and produce. The harmless forms of E. coli actually serve a purpose in the gut; they fight other, very harmful bacteria like Salmonella and can help break down carbohydrates for digestion ...
Chapter 2: The Enterobacteriaceae
... Enrichment broths and selective media for Salmonella There are many enrichment broths for the isolation of salmonellas, but some however, can be toxic for some serovars. Strains of Salmonella Typhisuis, S. Choleraesuis, S. Pullorum and S. Gallinarum are inhibited by selenite and tetrathionate broths ...
... Enrichment broths and selective media for Salmonella There are many enrichment broths for the isolation of salmonellas, but some however, can be toxic for some serovars. Strains of Salmonella Typhisuis, S. Choleraesuis, S. Pullorum and S. Gallinarum are inhibited by selenite and tetrathionate broths ...
The Gram Stain Procedure
... The Gram Stain In the late 1800’s, Christian Gram observed that some genera of bacteria retained a dye-Iodine complex when rinsed with alcohol, while other genera were easily decolorized with alcohol and could be then visualized by a contrasting counterstain. This staining procedure defines two bac ...
... The Gram Stain In the late 1800’s, Christian Gram observed that some genera of bacteria retained a dye-Iodine complex when rinsed with alcohol, while other genera were easily decolorized with alcohol and could be then visualized by a contrasting counterstain. This staining procedure defines two bac ...
nest-monitoring plots: methods for locating nests and monitoring
... display nervousdisplacementbehavior.This "nest dance"involvesbouncing back and forth between a few trees or substrates,and in somecases alsoincludesvery rapid foraging.Eventually,shewill start to movedown toward the nest and then suddenlyfly back up. This behavior will be repeated several times in t ...
... display nervousdisplacementbehavior.This "nest dance"involvesbouncing back and forth between a few trees or substrates,and in somecases alsoincludesvery rapid foraging.Eventually,shewill start to movedown toward the nest and then suddenlyfly back up. This behavior will be repeated several times in t ...
Glencoe Biology - Mr. Jones Jaguars
... A nonliving strand of genetic material within a protein coat No organelles to take in nutrients or use energy Cannot make proteins Cannot move Cannot replicate on their own Most viruses range in size from 5 to 300 nanometers. ...
... A nonliving strand of genetic material within a protein coat No organelles to take in nutrients or use energy Cannot make proteins Cannot move Cannot replicate on their own Most viruses range in size from 5 to 300 nanometers. ...
Open Access
... As a consequence of agricultural intensification, large areas of species-rich grasslands have been lost and farmland biodiversity has declined. Previous studies have shown that the continuity of grazing management can have a significant influence on the environmental conditions and the levels of pla ...
... As a consequence of agricultural intensification, large areas of species-rich grasslands have been lost and farmland biodiversity has declined. Previous studies have shown that the continuity of grazing management can have a significant influence on the environmental conditions and the levels of pla ...
Past iGEM Projects: Case Studies
... • Sensors are relatively straight-forward in design (ABC) • I/O signal sensitivity is key • Tight regulation of detector components • Most of the components were available (engineering vs. research) • Real world applications ...
... • Sensors are relatively straight-forward in design (ABC) • I/O signal sensitivity is key • Tight regulation of detector components • Most of the components were available (engineering vs. research) • Real world applications ...
Efflux pumps of Gram-negative bacteria: what they do, how they do it
... et al., 2005). Both EPs consist of three distinct proteins. The transporter component of the AcrAB-TolC pump, AcrB, is attached to the plasma membrane and coded by the gene acrB. There are two fusion proteins, AcrA, coded by the gene acrA, that flank the AcrB transporter and are believed to assist th ...
... et al., 2005). Both EPs consist of three distinct proteins. The transporter component of the AcrAB-TolC pump, AcrB, is attached to the plasma membrane and coded by the gene acrB. There are two fusion proteins, AcrA, coded by the gene acrA, that flank the AcrB transporter and are believed to assist th ...
Coupling spatial segregation with synthetic circuits to control
... bacteria carrying each circuit (Fig 2G–I). In the presence of carbenicillin, cells carrying the BlaM circuit grew to high final densities only if their initial densities were sufficiently high (< 20,480-fold dilution of calibrated overnight culture for 30 lg/ml Cb, while < 2,560-fold for 100 lg/ml C ...
... bacteria carrying each circuit (Fig 2G–I). In the presence of carbenicillin, cells carrying the BlaM circuit grew to high final densities only if their initial densities were sufficiently high (< 20,480-fold dilution of calibrated overnight culture for 30 lg/ml Cb, while < 2,560-fold for 100 lg/ml C ...
plaque - WordPress.com
... to preferential adsorption of ions from solution of certain groups attached to pellicle or surface. • The charge on surface is always exactly balanced by an equivalent number of counter ions; the size of this electrical double layer is inversely proportional to ionic strength of environment. • As pa ...
... to preferential adsorption of ions from solution of certain groups attached to pellicle or surface. • The charge on surface is always exactly balanced by an equivalent number of counter ions; the size of this electrical double layer is inversely proportional to ionic strength of environment. • As pa ...
Mechanistic Classes of Antibacterials
... Overkill (multiple antibiotics) has worked well for HIV/AIDS, but not always applicable for bacteria (side effects). Direct observation therapy - continue antibiotic dose until no bacteria remain (not practical). Use narrow-spectrum antibiotics when applicable. Withhold the most powerful drugs - pre ...
... Overkill (multiple antibiotics) has worked well for HIV/AIDS, but not always applicable for bacteria (side effects). Direct observation therapy - continue antibiotic dose until no bacteria remain (not practical). Use narrow-spectrum antibiotics when applicable. Withhold the most powerful drugs - pre ...
Microspectrometric insights on the uptake of antibiotics
... or NAD, together usually referred to as autofluorescence, which can interfere with the signal from the antibiotic. This label-free approach is sensitive and can be performed not only by spectrofluorimeters but also by conventional microscopes. Studies using spectrofluorimetry carried out on a bacter ...
... or NAD, together usually referred to as autofluorescence, which can interfere with the signal from the antibiotic. This label-free approach is sensitive and can be performed not only by spectrofluorimeters but also by conventional microscopes. Studies using spectrofluorimetry carried out on a bacter ...
PDF ( 27 ) - DergiPark
... Abstract: This study aimed to identify phenotypic and genotypic resistance profiles of bacteria isolated from soil and manure samples obtained from a farm where tetracycline and tylosin were used extensively. Samples were collected from the manure and soil, before and after manure application. All o ...
... Abstract: This study aimed to identify phenotypic and genotypic resistance profiles of bacteria isolated from soil and manure samples obtained from a farm where tetracycline and tylosin were used extensively. Samples were collected from the manure and soil, before and after manure application. All o ...
Biofilms in the dairy industry
... release a soluble polysaccharide into their environment that induces physicochemical surface alterations, which prevent biofilm formation by a wide range of Gram-positive and Gram-negative bacteria. • More recently, Davies and Marques (2009) found that P. aeruginosa produces cis-2- decenoic acid, wh ...
... release a soluble polysaccharide into their environment that induces physicochemical surface alterations, which prevent biofilm formation by a wide range of Gram-positive and Gram-negative bacteria. • More recently, Davies and Marques (2009) found that P. aeruginosa produces cis-2- decenoic acid, wh ...
ocular defense ocular defense mechanisms
... Clear Corneal Cataract Extractions Ô BABY SHAMPOO NOT ANTIBACTERIAL 10:1 dilution Harsh on tender eyelid skin Ô ANTIBACTERIAL SOAPS CONTAIN BAK or EtOH Not good for use around the eye ...
... Clear Corneal Cataract Extractions Ô BABY SHAMPOO NOT ANTIBACTERIAL 10:1 dilution Harsh on tender eyelid skin Ô ANTIBACTERIAL SOAPS CONTAIN BAK or EtOH Not good for use around the eye ...
univERsity oF copEnhAGEn
... Classification is the term used when the culture is described by these parameters. When the characterization is made using many or important key parameters, classification may be extensive enough to allow for a tentative identification of the culture, typically to either genus or species level. Such ...
... Classification is the term used when the culture is described by these parameters. When the characterization is made using many or important key parameters, classification may be extensive enough to allow for a tentative identification of the culture, typically to either genus or species level. Such ...
Predator-induced chancres of bacterial size
... The introduction of more sophisticated methods to analyze parameters at the single bacterial cell level (Zimmermann et al. 1978, Sieracki et al. 1985, Simek & Fuksa 1989, Hicks et al. 1992) allowed more precise descriptions of the bacterial strategies to reduce grazing mortality or escape into resis ...
... The introduction of more sophisticated methods to analyze parameters at the single bacterial cell level (Zimmermann et al. 1978, Sieracki et al. 1985, Simek & Fuksa 1989, Hicks et al. 1992) allowed more precise descriptions of the bacterial strategies to reduce grazing mortality or escape into resis ...
1010ExamII
... An insignificant amount of the Earth’s carbon is in Bacteria and Archaea There are way more humans on Earth than Bacteria and/or Archaea Less than 1% of Bacteria and Archaea can be cultured in the laboratory All of the above are true None of the above are true ...
... An insignificant amount of the Earth’s carbon is in Bacteria and Archaea There are way more humans on Earth than Bacteria and/or Archaea Less than 1% of Bacteria and Archaea can be cultured in the laboratory All of the above are true None of the above are true ...
Lesson Working regime of microbiological laboratory. The rules of
... c.* they are small cocci-shaped unmotile, asporogenes bacteria d. they are capsulated e. Chlamydia are stained with Gram as gram-positive bacteria 5. Choose the correct statement about Spirochetes: a. they contain teichoic acids in the cell wall; b. they are readily stained with Gram; d. *they are ...
... c.* they are small cocci-shaped unmotile, asporogenes bacteria d. they are capsulated e. Chlamydia are stained with Gram as gram-positive bacteria 5. Choose the correct statement about Spirochetes: a. they contain teichoic acids in the cell wall; b. they are readily stained with Gram; d. *they are ...
CONTROLLING Pseudomonas aeruginosa BIOFILMS
... Bacterial cells often form sessile biofilms that are up to 1,000 times more resistant to antimicrobial agents than free-living cells. Meanwhile, bacteria produce a small subpopulation of slow-growing or non-growing persister cells that exhibit high tolerance to antibiotics. Both biofilms and persist ...
... Bacterial cells often form sessile biofilms that are up to 1,000 times more resistant to antimicrobial agents than free-living cells. Meanwhile, bacteria produce a small subpopulation of slow-growing or non-growing persister cells that exhibit high tolerance to antibiotics. Both biofilms and persist ...
What is an E. Coli Infection? Escherichia coli commonly abbreviated
... Several different strains of harmful E. coli can cause diarrhea disease. A particularly dangerous type is called enterohemorrhagic E. coli, or EHEC. EHEC often causes bloody diarrhea and can lead to kidney failure in children or people with weakened immune systems. In 1982, scientists identified the ...
... Several different strains of harmful E. coli can cause diarrhea disease. A particularly dangerous type is called enterohemorrhagic E. coli, or EHEC. EHEC often causes bloody diarrhea and can lead to kidney failure in children or people with weakened immune systems. In 1982, scientists identified the ...
Bacterial differentiation within Moraxella bovis colonies growing at
... different mode of differentiation, and these sectors were similar to those seen in the air-surface colonies. Using the symmetry of these colonies, the incidence of both phase variants and clonal variants could be studied. Bacterial variation, or differentiation, plays an important role in the surviv ...
... different mode of differentiation, and these sectors were similar to those seen in the air-surface colonies. Using the symmetry of these colonies, the incidence of both phase variants and clonal variants could be studied. Bacterial variation, or differentiation, plays an important role in the surviv ...
10470 exploring bacteria - The Described and Captioned Media
... It might be surprising that bacteria provide a usehl way to teach about behavior and how it helps organisms survive, but bacteria do exhibit simple behaviors. For instance, motile bacteria move toward useful substances such as food and away from dangerous ones. Populations Bacteria reproduce quickly ...
... It might be surprising that bacteria provide a usehl way to teach about behavior and how it helps organisms survive, but bacteria do exhibit simple behaviors. For instance, motile bacteria move toward useful substances such as food and away from dangerous ones. Populations Bacteria reproduce quickly ...
Trophic roles of heterotrophic nanoflagellates and ciliates among
... interactions among these organisms in a hypereutrophic pond from March to October 1997. Densities of HNF and ciliates were high and attained a maximum of 1 . 4 X 105 and 3500 cells ml-l, respectively. However, the high densities decreased as chlorophyll concentration increased. Since the predominant ...
... interactions among these organisms in a hypereutrophic pond from March to October 1997. Densities of HNF and ciliates were high and attained a maximum of 1 . 4 X 105 and 3500 cells ml-l, respectively. However, the high densities decreased as chlorophyll concentration increased. Since the predominant ...
Bacteria
... teristics. Bacteria can be characterized properly only when bacterial colonies change into stalked structures, grow they are grown on a defined medium because the characlong, branched filaments, or form erect structures that reteristics of these organisms often change, depending on lease spores, sin ...
... teristics. Bacteria can be characterized properly only when bacterial colonies change into stalked structures, grow they are grown on a defined medium because the characlong, branched filaments, or form erect structures that reteristics of these organisms often change, depending on lease spores, sin ...
Quorum sensing
Quorum sensing is a system of stimulae and response correlated to population density. Many species of bacteria use quorum sensing to coordinate gene expression according to the density of their local population. In similar fashion, some social insects use quorum sensing to determine where to nest. In addition to its function in biological systems, quorum sensing has several useful applications for computing and robotics.Quorum sensing can function as a decision-making process in any decentralized system, as long as individual components have: (a) a means of assessing the number of other components they interact with and (b) a standard response once a threshold number of components is detected.