Actinobacteria

Under a magnification of 3841X, this scanning electron micrograph SEM) revealed some of the ultrastructural morphologic details exhibited by a number of Gram-positive bacilli, or rod-shaped, Mycobacterium fortuitum bacteria. See PHIL 11032 for a black and white version of this image.M. fortuitum is classified as a rapidly-growing Mycobacterium, due to the fact that it can be grown on laboratory culture medium in less than 7 days. As a human pathogen, this organism has been determined to be the cause of skin infections, including furunculosis, i.e., boils, on the legs of people receiving pedicures in nail salons.Created: 2009

After 72 hours of growth, and under a relatively low magnification of 7.5X, this blood agar plate (BAP) produced colonies of Eubacterium lentum bacteria.Created: 1972

This photomicrograph depicted a number of Gram-positive Corynebacterium diphtheriae bacteria, which had been stained using the methylene blue technique. The specimen was taken from a Pai’s slant culture.Created: 1973

Under a magnification of 3841X, this scanning electron micrograph SEM) revealed some of the ultrastructural morphologic details exhibited by a number of Gram-positive bacilli, or rod-shaped, Mycobacterium fortuitum bacteria. See PHIL 11033 for a colorized version of this image.M. fortuitum is classified as a rapidly-growing Mycobacterium, due to the fact that it can be grown on laboratory culture medium in less than 7 days. As a human pathogen, this organism has been determined to be the cause of skin infections, including furunculosis, i.e., boils, on the legs of people receiving pedicures in nail salons.Created: 2009

Magnified 1125X, this Brown & Brenn-stained photomicrograph revealed the presence of a single large chronic inflammatory granule due to an unidentified pathogen, found in a sample of a canine tissue specimen in a case of actinomycosis.Created: 1971

This scanning electron micrograph (SEM) depicted numbers of Segniliparus rugosus bacteria, of the strain ATCC BAA-947T = CIP-108380T, magnified 8922x.Created: 2005

This scanning electron micrograph (SEM) depicted numbers of Segniliparus rotundus bacteria, of the strain ATCC BAA-972T = CIP-108378T, magnified 5460x.Created: 2005

Magnified 160X, this Gamori-stained photomicrograph revealed the presence of a number of chronic inflammatory granules due to an unidentified pathogen, found in a sample of a canine tissue specimen in a case of actinomycosis.Created: 1971

Prepared using the Brown and Brenn method of staining, and under a magnification of 125X, this photomicrograph reveals histopathologic changes indicative of the presence of the Gram-positive, rod-shaped bacteria, Arachnia propionica.Created: 1972

Magnified 400X, this Brown & Brenn-stained photomicrograph revealed the presence of an unidentified pathogen found on the edge of a granule located in a sample of a canine plural exudate, in a case of actinomycosis.Created: 1971

After 72 hours of growth, and under a relatively low magnification of 7.5X, this blood agar plate (BAP) produced colonies of Propionibacterium acnes bacteria.Created: 1972

Magnified 400X, this Gram-stained photomicrograph revealed some of the histopathologic changes observed in a purulent exudate taken from a skin lesion determined to be due to the presence of Nocardia brasiliensis bacteria.Created: 1973

Under a magnification of 1125X, this Giemsa-stained photomicrograph revealed the presence of Gram-positive Corynebacterium sp. bacteria. Some species of the genus Corynebacterium, are actually a part of the normal population of human skin flora, however, one specie, Corynebacterium diphtheriae, causes an upper respiratory tract illness known as diphtheria. DiphtheriaClinical Features Respiratory diphtheria presents as a sore throat with low-grade fever and an adherent membrane of the tonsils, pharynx, or nose. Neck swelling is usually present in severe disease. Cutaneous diphtheria presents as infected skin lesions which lack a characteristic appearance.Etiologic Agent Toxin-producing strains of Corynebacterium diphtheriae.TransmissionDirect person- to-person transmission by intimate respiratory and physical contact. Cutaneous lesions are important in transmission.Created: 1972

This 1961 photograph depicted a Petri dish in which a colony of Streptomyces somaliensis fungal-like, aerobic bacterial organisms were being cultivated. The particular specie being grown here, S. somaliensis, are found in Africa, the Americas, Israel and India.Created: 1961

Magnified 125X, this photomicrograph revealed some of the morphology exhibited by a number of large and small Actinomyces odontolyticus microcolonies that had been cultured in a Petri dish atop a medium of brain heart infusion agar (BHIA), for a 48hr period.Created: 1973

Magnified 1800X, this Gram-stained photomicrograph revealed the presence of rod-shaped, Gram-positive Actinomyces odontolyticus bacteria that were found in a smear from a brain abscess. Note the hyphae, or branched chains of bacteria, giving these a fungal appearance.Created: 1971

Magnified 1800X, this Gram-stained photomicrograph revealed the presence of rod-shaped, Gram-positive Actinomyces odontolyticus bacteria that were found in a smear from a brain abscess. Note the hyphae, or branched chains of bacteria, giving these a fungal appearance.Created: 1971

Scanning Electron Micrograph of Mycobacterium chelonaeCreated:

Scanning Electron Micrograph of Mycobacterium chelonaeCreated:

Magnified 1000X, this photomicrograph revealed some of the ultrastructural morphology displayed by the aerobic, Gram-positive bacterium, Micromonospora sp.. This bacterium forms true mycelia that are composed of hyphae from which the reproductive spores arise. Note the many filamentous hyphae present in this micrograph.Created: 1972

Magnified 125X, this photomicrograph revealed some of the morphology exhibited by a number of Actinomyces viscosus microcolonies that had been cultured in a Petri dish atop a medium of brain heart infusion agar (BHIA), for a 48hr period.Created: 1973

Magnified 125X, this photomicrograph revealed some of the morphology exhibited by a number of Actinomyces viscosus microcolonies that had been cultured in a Petri dish atop a medium of brain heart infusion agar (BHIA), for a 48hrs period.Created: 1973

Magnified only 25X, this acid-fast (AF) stained tissue specimen revealed the presence of Gram-positive Actinomadura madurae bacterial organisms in the form of a chronic granulomatous inflammatory granule.Created: 1974

This Brown & Brenn-stained tissue specimen revealed the presence of Gram-positive Actinomadura madurae bacterial organisms.Created: 1974