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This image depicts a Petri dish containing a sheeps blood agar (SBA) medium, which had been inoculated with Gram-negative Yersinia pestis bacteria. Y. pestis is the pathogen responsible for causing human plague. This was the appearance of the colonial growth after 72 hours of incubation at 25º C.People usually get plague from being bitten by a rodent flea that is carrying the plague bacterium or by handling an infected animal. Millions of people in Europe died from plague in the Middle Ages, when human homes and places of work were inhabited by flea-infested rats. Today, modern antibiotics are effective against plague, but if an infected person is not treated promptly, the disease is likely to cause illness or death.Created: 2009
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This photograph depicts Salmonella sp. bacteria that had been cultured in a tetrathionate-enrichment broth, and stained using the direct fluorescent-antibody (FA) technique.Created: 1980
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This image depicts a Petri dish containing a MacConkey agar medium, which had been inoculated with Gram-negative Yersinia pestis bacteria. Y. pestis is the pathogen responsible for causing human plague. This was the appearance of the colonial growth after 48 hours of incubation.People usually get plague from being bitten by a rodent flea that is carrying the plague bacterium or by handling an infected animal. Millions of people in Europe died from plague in the Middle Ages, when human homes and places of work were inhabited by flea-infested rats. Today, modern antibiotics are effective against plague, but if an infected person is not treated promptly, the disease is likely to cause illness or death.Created: 2009
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Under a high magnification of 10431X, half that of PHIL 10566, this scanning electron micrograph (SEM) revealed a colony of Gram-negative bacilli, or rod-shaped Salmonella sp. bacteria. The genus Salmonella is a member of the taxonomic family, Enterobacteriaceae, and approximately 2000 serotypes of this genis are known to cause disease in human beings.How do people catch Salmonella?Salmonella live in the intestinal tracts of humans and other animals, including birds. Salmonella are usually transmitted to humans by eating foods contaminated with animal feces. Contaminated foods usually look and smell normal. Contaminated foods are often of animal origin, such as beef, poultry, milk, or eggs, but any food, including vegetables, may become contaminated. Thorough cooking kills Salmonella. Food may also become contaminated by the hands of an infected food handler who did not wash hands with soap after using the bathroom.Created: 2008
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This image depicts a Petri dish containing a sheeps blood agar (SBA) medium, which had been inoculated with Gram-negative Yersinia pestis bacteria. Y. pestis is the pathogen responsible for causing human plague. This was the appearance of the colonial growth after 48 hours of incubation at 37º C.People usually get plague from being bitten by a rodent flea that is carrying the plague bacterium or by handling an infected animal. Millions of people in Europe died from plague in the Middle Ages, when human homes and places of work were inhabited by flea-infested rats. Today, modern antibiotics are effective against plague, but if an infected person is not treated promptly, the disease is likely to cause illness or death.Created: 2009
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Under a high magnification of 10431X, half that of PHIL 10566, this scanning electron micrograph (SEM) revealed a colony of Gram-negative bacilli, or rod-shaped Salmonella sp. bacteria. The genus Salmonella is a member of the taxonomic family, Enterobacteriaceae, and approximately 2000 serotypes of this genis are known to cause disease in human beings. See PHIL 10945 for a colorized version of this image.How can Salmonella infections be diagnosed?Many different kinds of illnesses can cause diarrhea, fever, or abdominal cramps. Determining that Salmonella is the cause of the illness depends on laboratory tests that identify Salmonella in the stool of an infected person. Once Salmonella has been identified, further testing can determine its specific type.Created: 2008
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This image depicts a Petri dish containing a sheeps blood agar (SBA) medium, which had been inoculated with Gram-negative Yersinia pestis bacteria. Y. pestis is the pathogen responsible for causing human plague. This was the appearance of the colonial growth after 48 hours of incubation at 25º C.People usually get plague from being bitten by a rodent flea that is carrying the plague bacterium or by handling an infected animal. Millions of people in Europe died from plague in the Middle Ages, when human homes and places of work were inhabited by flea-infested rats. Today, modern antibiotics are effective against plague, but if an infected person is not treated promptly, the disease is likely to cause illness or death.Created: 2009
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At a very high magnification of 20863X, this scanning electron micrograph (SEM) revealed two Gram-negative bacilli, or rod-shaped Salmonella sp. bacteria. The genus Salmonella is a member of the taxonomic family, Enterobacteriaceae, and approximately 2000 serotypes of this genis are known to cause disease in human beings. See PHIL 10569 for a colorized version of this image.What sort of germ is Salmonella?Salmonella is actually a group of bacteria that can cause diarrheal illness in humans. They are microscopic living creatures that pass from the feces of people or animals to other people or other animals. There are many different kinds of Salmonella bacteria. Salmonella serotype Typhimurium and Salmonella serotype Enteritidis are the most common in the United States. Salmonella germs have been known to cause illness for over 100 years. They were discovered by an American scientist named Salmon, for whom they are named.Created: 2008
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This image depicts a Petri dish containing a MacConkey agar medium, which had been inoculated with Gram-negative Yersinia pestis bacteria. Y. pestis is the pathogen responsible for causing human plague. This was the appearance of the colonial growth after 24 hours of incubation.People usually get plague from being bitten by a rodent flea that is carrying the plague bacterium or by handling an infected animal. Millions of people in Europe died from plague in the Middle Ages, when human homes and places of work were inhabited by flea-infested rats. Today, modern antibiotics are effective against plague, but if an infected person is not treated promptly, the disease is likely to cause illness or death.Created: 2009
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This SEM depicts a number of clusters of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria under a relatively low magnification of 1,546x. See PHIL 9328 for a black and white version of this image.Created: 2007
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This image depicts a Petri dish containing a sheeps blood agar (SBA) medium, which had been inoculated with Gram-negative Yersinia pestis bacteria. Y. pestis is the pathogen responsible for causing human plague. This was the appearance of the colonial growth after 24 hours of incubation at 37º C.People usually get plague from being bitten by a rodent flea that is carrying the plague bacterium or by handling an infected animal. Millions of people in Europe died from plague in the Middle Ages, when human homes and places of work were inhabited by flea-infested rats. Today, modern antibiotics are effective against plague, but if an infected person is not treated promptly, the disease is likely to cause illness or death.Created: 2009
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This SEM depicts a highly magnified cluster of Gram-negative, non-motile Acinetobacter baumannii bacteria; Mag - 27600x. See PHIL 6497 for a black and white version of this image.Created: 2004
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This micrograph was stained using a fluorescent antibody staining technique (FA), which uses the specific conjugated antiserum to Fraction 1 (F1) antigen of Yersinia pestis to identify the antigens present in animal tissues, and appropriate cultures.Created: 1993
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This SEM depicts a couple of clusters of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria as seen under a magnification of 12,739x. See PHIL 9330 for a black and white version of this image.Created: 2007
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This photograph depicts the colonial growth pattern displayed by Providencia alcalifaciens bacteria cultured on a blood agar plate (BAP).Created: 1976
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This SEM depicts a couple of clusters of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria as seen under a magnification of 12,739x. See PHIL 10094 for a colorized version of this image.Created: 2007
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This photograph depicts the colonial growth pattern displayed by Providencia alcalifaciens bacteria cultured on a Hektoen enteric (HE) agar medium; when grown on HE agar, P. alcalifaciens produces colonies very similar to those produced by Shigella spp., which are greenish-blue in color, and appear moist.Created: 1976
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This SEM depicts a number of clusters of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria as seen under a low magnification of 773x.Created: 2007
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This photograph depicts the colonial growth pattern displayed by Providencia alcalifaciens bacteria cultured on a Xylose Lysine Sodium Deoxycholate (XLD) agar plate.Created: 1976
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This SEM depicts a number of clusters of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria under a relatively low magnification of 1,546x. See PHIL 10096 for a colorized version of this image.Created: 2007
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This inoculated human blood agar culture plate cultivated colonial growth of Gram-negative, rod-shaped and facultatively anaerobic Serratia marcescens bacteria.Note the hemolytic effect induced by the presence of the S. marcescens, which was indicated by the halo surrounding each of the bacterial colonies. In these lightened area, a lysis of red blood cells (RBCs) contained in the blood agar medium had taken place. In this case the hemolytic effect is termed beta-hemolysis (ß-hemolysis), whereupon, there is a complete lysis of the RBCs. Beta hemolysis is due to the bacterial production of hemolysins. There is another type of hemolytic reaction, which is known as alpha hemolysis (a-hemolysis), in which case there would be a greenish halo visible surrounding the bacterial colonies, and is sometimes referred to as incomplete, or partial hemolysis. Alpha hemolysis is brought on due to the bacterial production of peroxides.Created: 1973
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This SEM depicts a number of clusters of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria under a magnification of 6,182x.Created: 2007
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This inoculated blood agar base plate cultivated colonial growth of Gram-negative, rod-shaped and facultatively anaerobic Serratia marcescens bacteria.Created: 1973
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This SEM depicts a pair of aerobic Gram-negative, non-motile Acinetobacter baumannii bacteria under a magnification of 24,730x.Created: 2007