Enterobacteriaceae

After 24 hours, this inoculated MacConkey agar culture plate cultivated colonial growth of Gram-negative, rod-shaped, and facultatively anaerobic Proteus vulgaris bacteria.Created: 1985

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

At an extremely high magnification of 44, 818X, twice that of PHIL 10574 and 10575, this colorized scanning electron micrograph (SEM) revealed some of the morphologic details displayed by a single Gram-negative Escherichia coli bacterium. This bacterium was a member of the strain, 0:169 H41 ETEC (Enterotoxigenic E. coli). See PHIL 10576 for a black and white version of this image.Enterotoxigenic E. coli, a common cause of bacterial diarrhea…Enterotoxigenic Escherichia coli, or ETEC, is an important cause of bacterial diarrheal illness. Infection with ETEC is the leading cause of travelers' diarrhea and a major cause of diarrheal disease in underdeveloped nations, especially among children. ETEC is transmitted by food or water contaminated with animal or human feces. Although ETEC causes a significant amount of illness worldwide, the infection will end on its own and is rarely life-threatening.Created: 2008

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

Magnified 600X, this fluorescent antibody stained photomicrograph revealed the presence of enteropathogenic Escherichia coli bacteria, which were found in a fecal smear from an infant with diarrhea. E. coli is a member of the family of bacterial organisms within the family Enteribacteriaceae, and contains the highly pathogenic strain, which has been given the label O157:H7.Created: 1960

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

Magnified 1250X, this fluorescent antibody stained photomicrograph revealed the presence of enteropathogenic Escherichia coli bacteria, which were found in a fecal smear from an infant with diarrhea. E. coli is a member of the family of bacterial organisms within the family Enteribacteriaceae, and contains the highly pathogenic strain, which has been given the label O157:H7.Created: 1960

Under a high magnification of 10961x, this colorized scanning electron micrograph (SEM) depicted a number of Gram-negative Escherichia coli bacteria of the strain O157:H7. E. coli O157:H7 is one of hundreds of strains of this bacterium. Although most strains are harmless, and live in the intestines of healthy humans and animals, this strain produces a powerful toxin, which can cause severe illness.E. coli O157:H7 was first recognized as a cause of illness in 1982 during an outbreak of severe bloody diarrhea; the outbreak was traced to contaminated hamburgers. Since then, most infections have come from eating undercooked ground beef.The combination of letters and numbers in the name of the bacterium refers to the specific markers found on its surface, which distinguishes it from other types of E. coli. See PHIL 8797 for a black and white version of this image.Created: 2006

Under a magnification of 3418x, this colorized scanning electron micrograph (SEM) depicted a number of Gram-negative Escherichia coli bacteria of the strain O157:H7. E. coli O157:H7 is one of hundreds of strains of this bacterium. Although most strains are harmless, and live in the intestines of healthy humans and animals, this strain produces a powerful toxin, which can cause severe illness.E. coli O157:H7 was first recognized as a cause of illness in 1982 during an outbreak of severe bloody diarrhea; the outbreak was traced to contaminated hamburgers. Since then, most infections have come from eating undercooked ground beef.The combination of letters and numbers in the name of the bacterium refers to the specific markers found on its surface, which distinguishes it from other types of E. coli. See PHIL 8798 for a black and white version of this image.Created: 2006

Under a magnification of 6836x, this colorized scanning electron micrograph (SEM) depicted two Gram-negative Escherichia coli bacteria of the strain O157:H7. E. coli O157:H7 is one of hundreds of strains of this bacterium. Although most strains are harmless, and live in the intestines of healthy humans and animals, this strain produces a powerful toxin, which can cause severe illness.E. coli O157:H7 was first recognized as a cause of illness in 1982 during an outbreak of severe bloody diarrhea; the outbreak was traced to contaminated hamburgers. Since then, most infections have come from eating undercooked ground beef.The combination of letters and numbers in the name of the bacterium refers to the specific markers found on its surface, which distinguishes it from other types of E. coli. See PHIL 8799 for a black and white version of this image.Created: 2006

Under a magnification of 6836x, this colorized scanning electron micrograph (SEM) depicted a number of Gram-negative Escherichia coli bacteria of the strain O157:H7, which is one of hundreds of strains of this bacterium. Although most strains are harmless, and live in the intestines of healthy humans and animals, this strain produces a powerful toxin, which can cause severe illness.E. coli O157:H7 was first recognized as a cause of illness in 1982 during an outbreak of severe bloody diarrhea; the outbreak was traced to contaminated hamburgers. Since then, most infections have come from eating undercooked ground beef.The combination of letters and numbers in the name of the bacterium refers to the specific markers found on its surface, which distinguishes it from other types of E. coli. See PHIL 8800 for a black and white version of this image.Created: 2006

Under a high magnification of 13671x, this colorized scanning electron micrograph (SEM) depicted a single Gram-negative Escherichia coli bacterium of the strain O157:H7. E. coli O157:H7 is one of hundreds of strains of this bacterium. Although most strains are harmless, and live in the intestines of healthy humans and animals, this strain produces a powerful toxin, which can cause severe illness.E. coli O157:H7 was first recognized as a cause of illness in 1982 during an outbreak of severe bloody diarrhea; the outbreak was traced to contaminated hamburgers. Since then, most infections have come from eating undercooked ground beef.The combination of letters and numbers in the name of the bacterium refers to the specific markers found on its surface, which distinguishes it from other types of E. coli. See PHIL 8801 for a black and white version of this image.Created: 2006

Under a magnification of 7075x, this colorized scanning electron micrograph (SEM) depicted a number of Gram-negative Escherichia coli bacteria of the strain O157:H7. E. coli O157:H7 is one of hundreds of strains of this bacterium. Although most strains are harmless, and live in the intestines of healthy humans and animals, this strain produces a powerful toxin, which can cause severe illness.E. coli O157:H7 was first recognized as a cause of illness in 1982 during an outbreak of severe bloody diarrhea; the outbreak was traced to contaminated hamburgers. Since then, most infections have come from eating undercooked ground beef.The combination of letters and numbers in the name of the bacterium refers to the specific markers found on its surface, which distinguishes it from other types of E. coli. See PHIL 8802 for a black and white version of this image.Created: 2006

This colorized version of PHIL 7137 depicts a highly magnified scanning electron micrographic (SEM) view of a dividing Escherichia coli bacteria, clearly displaying the point at which the bacteria’s cell wall was dividing; Magnification 21674x.Created: 2005

Transmission electron micrograph of Escherichia coli O157:H7. See PHIL 188 for a black and white version of this image.Created: 1995

This scanning electron micrograph (SEM) depicts a number of rod-shaped Escherichia coli bacteria, some of which have formed colonial groupings, while others have remained isolated as single cells; Magnification 3607x.Created: 2005

This scanning electron micrograph (SEM) depicts a highly magnified view of a rod-shaped Escherichia coli bacterium; Magnification 12800x.Created: 2005

This scanning electron micrograph (SEM) depicts a highly magnified view of a dividing Escherichia coli bacteria, clearly displaying the point at which the bacteria’s cell wall was dividing; Magnification 21674x.Created: 2005

This scanning electron micrograph (SEM) depicts two Escherichia coli bacteria, clearly displaying one or more peritrichous flagella, i.e., flagella that may originate from anywhere on the bacterium’s cell wall surface.; Magnification 4890x.Created: 2005

These are colonies of Escherichia coli bacteria grown on a Hektoen enteric (HE) agar plate medium; colonies of E. coli grown on HE agar display a raised morphology, and are yellow, to orange-yellow in coloration.Created: 1976

At an extremely high magnification of 44, 818X, twice that of PHIL 10574 and 10575, this scanning electron micrograph (SEM) revealed some of the morphologic details displayed by a single Gram-negative Escherichia coli bacterium. This bacterium was a member of the strain, 0:169 H41 ETEC (Enterotoxigenic E. coli). See PHIL 10577 for a colorized version of this image.Enterotoxigenic E. coli, a common cause of bacterial diarrhea…Enterotoxigenic Escherichia coli, or ETEC, is an important cause of bacterial diarrheal illness. Infection with ETEC is the leading cause of travelers' diarrhea and a major cause of diarrheal disease in underdeveloped nations, especially among children. ETEC is transmitted by food or water contaminated with animal or human feces. Although ETEC causes a significant amount of illness worldwide, the infection will end on its own and is rarely life-threatening.Created: 2008

At a very high magnification of 22,409X, this scanning electron micrograph (SEM) revealed some of the morphologic details displayed by a single Gram-negative Escherichia coli bacterium. This bacterium was a member of the strain, 0:169 H41 ETEC (Enterotoxigenic E. coli).Enterotoxigenic E. coli, a common cause of bacterial diarrhea…Enterotoxigenic Escherichia coli, or ETEC, is an important cause of bacterial diarrheal illness. Infection with ETEC is the leading cause of travelers' diarrhea and a major cause of diarrheal disease in underdeveloped nations, especially among children. ETEC is transmitted by food or water contaminated with animal or human feces. Although ETEC causes a significant amount of illness worldwide, the infection will end on its own and is rarely life-threatening.Created: 2008

At a very high magnification of 22,409X, this scanning electron micrograph (SEM) revealed some of the morphologic details displayed by two joined Gram-negative Escherichia coli bacteria. These bacteriia were members of the strain, 0:169 H41 ETEC (Enterotoxigenic E. coli).Enterotoxigenic E. coli, a common cause of bacterial diarrhea…Enterotoxigenic Escherichia coli, or ETEC, is an important cause of bacterial diarrheal illness. Infection with ETEC is the leading cause of travelers' diarrhea and a major cause of diarrheal disease in underdeveloped nations, especially among children. ETEC is transmitted by food or water contaminated with animal or human feces. Although ETEC causes a significant amount of illness worldwide, the infection will end on its own and is rarely life-threatening.Created: 2008

At a very high magnification of 25,920X, twice that of PHIL 10570 and 10571, this scanning electron micrograph (SEM) revealed some of the morphologic details displayed a single Gram-negative Escherichia coli bacterium. This bacterium was a member of the strain, 0:169 H41 ETEC (Enterotoxigenic E. coli).What is ETEC?ETEC was first recognized as a cause of human diarrheal illness in the 1960s. It have since emerged as a major bacterial cause of diarrhea among travelers and children in the developing world. ETEC is increasingly recognized as an important cause of foodborne illness in developed nations, such as the United States.ETEC produces two toxins, a heat-stable toxin (known as ST) and a heat-labile toxin (LT). Although different strains of ETEC can secrete either one or both of these toxins, the illness caused by each toxin is similar.Created: 2008