Gram-Positive Bacteria

Pneumococcal meningitis in an alcoholic

Percentage of Nosocomial Enterococci Reported as Resistant to Vancomycin in Intensive Care Units and non-ICUs, 1989-1994 (graph)

Prevalence of High Level Penicillin Resistance in Streptococcus pneumoniae, United States

Scanning Electron Micrograph of Enterococcus species

Scanning Electron Micrograph of Enterococcus faecalis

Scanning Electron Micrograph of Staphylococcus epidermidis

Scanning Electron Micrograph of Streptococcus pneumoniae.

Scanning Electron Micrograph of Vancomycin Resistant Enterococci

This scanning electron micrograph depicts a grouping of methicillin resistant Staphylococcus aureus (MRSA) bacteria.

Histopathology of mediastinal lymph node in fatal human anthrax.

Blood agar plate culture of Corynebacterium aquaticum.

Blood agar plate culture of Corynebacterium diptheriae (belfanti).

Blood agar plate culture of Corynebacterium diptheriae (gravis), smooth.

Blood agar plate culture of Corynebacterium diptheriae (gravis), rough.

Blood agar plate culture of Corynebacterium diptheriae (intermedius).

Enterococcus species.

Micrococcus mucilaginosis.

Enterococcus species.

Streptococcus pneumoniae in spinal fluid after treatment with penicillin. FA stain (digitally colorized).

Streptococcus pneumoniae in spinal fluid. FA stain (digitally colorized).

Clostridium novyi. Leifson flagella stain (digitally colorized).

Clostridium tertium. Leifson flagella stain (digitally colorized).

Streptococcus mutans. Gram stain.

Haemophilus influenzae satelliting around Staphylococcus aureus.

Lactobacillus organisms and vaginal squamous epithelial cell.

Bacillus firmus. Gram stain.

Bacillus firmus. Leifson flagella stain.

Bacillus coagulans. Leifson flagella stain.

Bacillus coagulans showing spores. Gram stain.

Bacillus coagulans. Gram stain.

Bacillus circulans. Leifson flagella stain.

Bacillus circulans showing spores. Gram stain.

Bacillus circulans. Gram stain.

Bacillus cereus subsp. mycoides. Gram stain.

Bacillus cereus. Leifson flagella stain.

Bacillus cereus. Gram stain.

Bacillus brevis. Leifson flagella stain.

Bacillus brevis showing spores. Gram stain.

Bacillus brevis. Gram stain.

Bacillus anthracis. Gram stain.

Bacillus alvei. Leifson flagella stain.

Bacillus alvei. Gram stain.

A photomicrograph of Streptococcus mutans bacteria using Gram stain technique.

Anthrax skin lesion on face of man.

Hemorrhagic meningitis due to inhalation anthrax.

Bicarbonate agar and blood agar plate cultures of Bacillus anthracis.

Sheep blood agar plate culture of Bacillus anthracis and Bacillus cereus.

Blood agar and bicarbonate agar plate cultures of Bacillus cereus.

Blood agar plate culture of Bacillus anthracis.

Aerococcus species. Gram stain.

Actinomyces viscosus. Gram stain.

Blood agar plate culture of Corynebacterium diphtheriae intermedius.

Blood agar plate culture of Corynebacterium diphtheriae mitis.

Blood agar plate culture of Corynebacterium equi.

Blood agar plate culture of Corynebacterium haemolyticum.

Blood agar plate culture of Corynebacterium minutissimum.

Blood agar plate culture of Corynebacterium pseudodiphtheriticum.

Blood agar plate culture of Corynebacterium pseudotuberculosis.

Blood agar plate culture of Corynebacterium diphtheriae intermedius.

Blood agar plate culture of Corynebacterium diphtheriae mitis.

Blood agar plate culture of Corynebacterium haemolyticum.

Blood agar plate culture of Corynebacterium pseudotuberculosis.

Blood agar plate culture of Corynebacterium pyogenes.

Blood agar plate culture of Corynebacterium renale.

Blood agar plate culture of Corynebacterium striatum.

Blood agar plate culture of Corynebacterium ulcerans.

Blood agar plate culture of Erysipelothrix rhusiopathiae.

Anthrax, skin of neck.

Bacillus anthracis

Transmission electron micrograph of Bacillus anthracis.

Confocal micrograph of Bacillus anthracis.

Transmission electron micrograph of Bacillus anthracis.

Bacillus anthracis capsule production on bicarbonate agar medium.

Bacillus anthracis M'Faydean capsule stain.

Bacillus anthracis Indian Ink capsule stain.

Bacillus anthracis Gamma phage lysis on sheep blood agar.

B. anthracis Direct Fluorescent Antibody (DFA) cell wall stain.

B. anthracis Direct Fluorescent Antibody (DFA) capsule stain.

Bacillus species Malachite Green spore stain.

Bacillus anthracis spores seen under phase contrast microscopy.

Bacillus species Malachite Green spore stain.

Bacillus anthracis Avirulent Pasteur Strain, Non-hemolytic on sheep blood agar

Bacillus anthracis tenacity positive on sheep blood agar.

Bacillus cereus showing hemolysis on sheep blood agar.

Clostridium botulinum growing on egg yolk agar showing the lipase reaction after 72 hours of incubation.

Clostridium botulinum spores stained with Malachite Green Stain.

Anthrax lesion on volar surface of right forearm.

Anthrax lesion on the neck.

Wound botulism involvement of compound fracture of right arm.

A diphtheria skin lesion on the leg.

Diphtheria skin lesion on the neck.

Photomicrograph of Corynebacterium diphtheriae magnified 1200x.

Anthrax lesion on the skin of the forearm caused by the bacterium Bacillus anthracis.

A photomicrograph of Clostridium botulinum bacteria.

A photomicrograph of Streptococcus pyogenes bacteria.

Photomicrograph of Streptococcus pyogenes bacteria, 900x Mag.

Photomicrograph of Streptococcus (Diplococcus) pneumoniae bacteria, using Gram stain technique.

Photomicrograph of Streptococcus pneumoniae bacteria revealing capsular swelling using the Neufeld-Quellung test.

This drawing depicts Bacillus anthracis taken from the peritoneum using a Hiss capsule stain.

Scanning electron micrograph of a Staphylococcus biofilm on the inner surface of a needleless connector.

Plate culture of Actinomyces sp., a Gram positive opportunistic pathogen that is normally found in the oral cavity.

Plate culture of Actinomyces sp., a gram-positive opportunistic pathogen that is normally found in the oral cavity.

A BHI plate culture of Actinomyces sp., strain X616, at 72hrs of growth.

This is a thioglycollate broth culture of Actinomyces naeslundii; strain X600.

A BHI agar plate culture of Actinomyces sp., strain X573, incubated anaerobically.

A BHI agar plate culture of Actinomyces sp., strain X407, at 7 days, incubated anaerobically.

A BHI agar plate culture of Actinomyces sp., strain X573, at 7 days, incubated anaerobically.

A patient with Actinomycosis on the right side of the face.

This photomicrograph shows the bacterium Bacteroides thetaiotaomicron cultured in a thioglycollate medium for 48 hours.

This tissue specimen shows signs of Pitted Keratolysis due to a Dermatophilus sp. infection; using a PAS stain.

This slide culture shows Rhodococcus rhodochrous that has been cultured on tap water agar.

This is a photomicrograph of a slide culture of Mycobacterium fortuitum grown on tap water agar.

This is a slide culture of a Streptomyces sp. grown on tap water agar.

This micrograph demonstrates a clustering of Dermatophilus congolensis bacteria using a Giemsa stain.

This is a photomicrograph of Dermatophilus congolensis bacteria using a Giemsa stain.

This micrograph depicts Nocardia brasiliensis found in a purulent exudate from a skin lesion using gram-stain.

This photomicrograph reveals Clostridium perfringens grown in Schaedler�s broth using gram-stain.

This micrograph depicts a Peptostreptococcus sp. grown in Schaedler�s broth using gram-stain.

These slant cultures growing Actinomyces viscosus, reveal the oxygen requirements of this bacterium; strain W828.

This Brown and Brenn stained brain abscess tissue sample reveals histopathologic changes due to A. naeslundii bacteria.

This methylamine silver stained brain abscess tissue sample shows histopathologic changes due to A. naeslundii bacteria.

Note the presence of the gram-positive acid-fast Nocardia brasiliensis bacteria using a modified Fite-Faraco stain.

This micrograph reveals a granule with an eosinophilic border, i.e. Splendore-Hoeppli phenomenon, due to N. brasiliensis.

This micrograph depicts histopathologic changes due to the gram-positive organism, Actinomyces israelii.

This micrograph depicts the gram-positive bacterium Bifidobacterium eriksonii.

This micrograph depicts gram-positive Peptostreptococcus spp. bacteria, which are known to grow in chain formations.

These slant cultures demonstrate the variations in colonial appearance among aerobic Actinomycetes spp..

This micrograph depicts the gram-positive bacterium Bifidobacterium eriksonii grown in blood agar for 48 hours.

This micrograph depicts the gram-positive bacterium Eubacterium alactolyticum grown in blood agar for 48 hours.

This micrograph depicts the gram-positive bacterium Propionibacterium acnes grown in blood agar for 48 hours.

This micrograph depicts the gram-positive bacterium Bifidobacterium eriksonii grown in thioglycollate medium at 48 hours.

This micrograph depicts the gram-positive bacterium Propionibacterium acnes grown in thioglycollate medium at 48 hours.

This plate culture of Mycobacterium balnei shows a rough colony of granular growth containing fine red pigment deposits.

This is a plate culture of Mycobacterium balnei revealing the presence of red pigment deposits.

This plate culture grew a smooth colony of Mycobacterium balnei with red pigment, silver fringe and peripheral flange.

This extreme close-up of a plate culture of Mycobacterium balnei reveals a smooth colony margin with transmitted light.

This is a plate culture of the bacteria Nocardia asteroides grown on 7H10 agar plates at 37� C.

This is a plate culture of the bacteria Nocardia asteroides grown on 7H10 agar medium at 37� C.

This micrograph depicts Streptococcus pneumoniae bacteria in cerebral spinal fluid using FA staining technique.

This photomicrograph depicts the histopathologic changes associated with nocardiosis of the lung.

This is a plate culture of Nocardia asteroides, strain 7H10, grown at 37�C.

Pictured is a Lowenstein-Jensen Slant culture of Nocardia asteroids at 37�C.

This is a blood agar, cycloserine mannitol plate culture growing colonies of Clostridium difficile for 48 hours.

Using the API� system, here 50 wells have been inoculated with Clostridium ramosum.

This strip of API� wells was inoculated with Bifidobacterium eriksonii, also called Actinomyces eriksonii.

This photograph depicts Clostridium difficile colonies after 48hrs growth on a blood agar plate; Magnified 4.8X.

This Gram-stain micrograph depicts Clostridium difficile after 24hrs of growth in chopped meat medium; Magnified 956X.

This is an image of Clostridium difficile colonies grown on cycloserine mannitol agar after 48 hours.

This is an impression smear photomicrograph of Clostridium difficile bacteria grown on cycloserine mannitol blood agar.

This is a photomicrograph of gram-positive Clostridium innocuum bacteria.

This is a photomicrograph of Clostridium tertium bacteria using a Leifson flagella stain; Magnified 320X.

This is a photomicrograph of gram-positive Clostridium innocuum bacteria.

These are Clostridium botulinum Type A colonies, Strain 2, grown on a 48hr blood agar plate.

This is a Clostridium botulinum type A colony grown on a 72 hour blood agar plate; Magnification 5X.

This Gram-stained micrograph of Clostridium botulinum Type-A in thioglycollate broth was incubated for 48hrs at 35�C.

These are Clostridium botulinum Type E colonies displaying an opaque zone grown on a 48hr egg yolk agar plate; Mag. 1.9X.

These are cultures of the anaerobic bacterium Clostridium perfringens grown on an egg yolk agar plate.

These Clostridium perfringens colonies were cultured on a half-antitoxin plate.

These Clostridium perfringens colonies were cultured on a SPS (Sulfite Polymyxin Sulfadiazine) agar plate.

The Clostridium difficile enterotoxin, CPE, is the principal toxin involved in C. difficile foodborne illness.

This micrograph of the bacterium Clostridium difficile is made from an impression smear of 72hr anaerobe blood agar.

These are Clostridium sporogenes colonies grown on a 48hr blood agar plate; Magnification 15X.

This photomicrograph depicts Gram-stained Peptococcus niger grown on a LD broth culture.

Here F. mortiferum and C. perfringens grew on PEA agar with inhibition of E. coli and P. vulgaris.

E. coli, F. mortiferum, P. vulgaris, and C. perfringens were grown on a 24hr blood agar culture.

F. mortiferum and C. perfringens, with E. coli and P. vulgaris inhibited, grown on 48hr PEA agar.

This MacConkey plate grew colonies of E. coli, F. mortiferum, P. vulgaris, but not C. perfringens.

This is a close up of contaminated Jalape�o peppers involved in an outbreak of botulism in Pontiac, Michigan, April, 1977.

This is a close-up image of a plate culture of Mycobacterium balnei revealing a number of red pigment deposits.

This is lymph node impression smear reveals B. anthracis on the left, with normal, non-infected tissue on the right.

This was a blood agar culture plate growing B. anthracis and other soil flora.

This agar culture plate is growing Bacillus anthracis colonies.

This is a photomicrograph of lung tissue infected with Bacillus anthracis bacteria.

This was a blood agar culture plate growing B. anthracis and other soil flora.

This man was "made up" so as to show symptoms of cutaneous anthrax due to B. anthracis.

This is the histopathologic appearance of an actinomycetic mycetomatous granule using a Brown and Brenn stain.

This micrograph reveals mycelia and pairs of spores of a Gram-positive Microbispora sp..

This Gram-positive aerobic Nocardia asteroides slide culture reveals chains of amongst aerial mycelia.

This is an actinomycotic mycetomatous granule due to the bacteria Streptomyces somaliensis.

This is a micrograph of an exudate taken from a subdural empyema due to an infection caused by multiple genera of bacteria.

This culture dish grew E. coli, F. mortiferum, P. vulgaris, and C. perfringens bacterial colonies.

These are Clostridium chauvoei colonies; Magnification 2X.

This photograph shows Clostridium subterminale colonies grown on a 48 hour blood agar plate; Magnification 15X.

This enlargement depicts Clostridium paraputrificum colonies grown on a 48 hour blood agar plate; Magnification 15X.

This enlargement depicts Clostridium capitovale colonies grown on a 48 hour blood agar plate; Magnification 15X.

This photomicrograph shows Peptostreptococcus anaerobius on blood agar plate (BAP) using Gram's stain after 48 hours.

This image shows colonies of Peptostreptococcus asaccharolyticus, formerly Peptococcus aerogenes, on blood agar.

This image shows a blood agar culture growing colonies of the gram-positive bacteria Peptococcus magnus bacteria.

This was a Mycobacterium tuberculosis drug susceptibility test done on an agar medium.

This photomicrograph reveals Mycobacterium tuberculosis bacteria using acid-fast Ziehl-Neelsen stain; Magnified 1000X.

This is a close-up of a Mycobacterium tuberculosis culture revealing this organism�s colonial morphology.

This methylene blue-stained micrograph shows Staphylococcus aureus bacteria, an organism linked to Toxic Shock Syndrome.

This Gram-stained micrograph reveals Staphylococcus aureus bacteria, which can be responsible for Toxic Shock Syndrome.

This micrograph reveals the histopathologic changes in lung tissue due to Toxic Shock Syndrome (TSS) taken during an autopsy.

This is a scanning electron micrograph depicting Gram-positive Staphylococcus aureus bacteria.

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