Gram Stain Microscopy Gallery | World of Bacteria

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This visual index brings together Gram-stained micrographs from across the World of Bacteria atlas. It is designed for rapid comparison of bacterial staining patterns and cellular morphology while keeping each dedicated species page as the main educational destination.

Gram stain microscopy of Achromobacter xylosoxidans showing gram-negative rods — Achromobacter xylosoxidans Gram-negative rods

Gram stain microscopy of Acinetobacter baumannii showing gram-negative coccobacilli — Acinetobacter baumannii Gram-negative coccobacilli

Gram stain microscopy of Aeromonas hydrophila showing gram-negative rods — Aeromonas hydrophila Gram-negative rods

Gram stain microscopy of Aeromonas veronii showing gram-negative rods — Aeromonas veronii Gram-negative rods

Gram stain microscopy of Bacillus anthracis showing gram-positive rods — Bacillus anthracis Gram-positive rods

Gram stain microscopy of Bacillus cereus showing gram-positive rods — Bacillus cereus Gram-positive rods

Gram stain microscopy of Citrobacter koseri showing gram-negative rods — Citrobacter koseri Gram-negative rods

Gram stain microscopy of Clostridioides difficile showing gram-positive rods — Clostridioides difficile Gram-positive rods

Gram stain microscopy of Clostridium perfringens showing gram-positive rods — Clostridium perfringens Gram-positive rods

Gram stain microscopy of Corynebacterium amycolatum showing gram-positive rods — Corynebacterium amycolatum Gram-positive rods

Gram stain microscopy of Corynebacterium aurimucosum showing gram-positive pleomorphic coryneform rods — Corynebacterium aurimucosum Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium diphtheriae showing gram-positive pleomorphic coryneform rods — Corynebacterium diphtheriae Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium jeikeium showing gram-positive pleomorphic coryneform rods — Corynebacterium jeikeium Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium kroppenstedtii showing gram-positive pleomorphic coryneform rods — Corynebacterium kroppenstedtii Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium macginleyi showing gram-positive pleomorphic coryneform rods — Corynebacterium macginleyi Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium mucifaciens showing gram-positive pleomorphic coryneform rods — Corynebacterium mucifaciens Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium propinquum showing gram-positive pleomorphic coryneform rods — Corynebacterium propinquum Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium pseudodiphtheriticum showing gram-positive pleomorphic coryneform rods — Corynebacterium pseudodiphtheriticum Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium pseudotuberculosis showing gram-positive pleomorphic coryneform rods — Corynebacterium pseudotuberculosis Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium resistens showing gram-positive pleomorphic coryneform rods — Corynebacterium resistens Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium simulans showing gram-positive pleomorphic coryneform rods — Corynebacterium simulans Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium striatum showing gram-positive pleomorphic coryneform rods — Corynebacterium striatum Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium tuberculostearicum showing gram-positive pleomorphic coryneform rods — Corynebacterium tuberculostearicum Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Corynebacterium ulcerans showing gram-positive pleomorphic coryneform rods — Corynebacterium ulcerans Gram-positive pleomorphic coryneform rods

Gram stain microscopy of Enterococcus faecalis showing gram-positive cocci in pairs and short chains — Enterococcus faecalis Gram-positive cocci in pairs and short chains

Gram stain microscopy of Enterococcus faecium (Blood culture) showing gram-positive cocci — Enterococcus faecium Blood culture Gram-positive cocci

Gram stain microscopy of Escherichia coli (Beta-haemolytic strain) showing gram-negative rods — Escherichia coli Beta-haemolytic strain Gram-negative rods

Gram stain microscopy of Escherichia coli (Nissle 1917 strain) showing gram-negative rods — Escherichia coli Nissle 1917 strain Gram-negative rods

Gram stain microscopy of Escherichia coli (Non-haemolytic strain) showing gram-negative rods — Escherichia coli Non-haemolytic strain Gram-negative rods

Gram stain microscopy of Escherichia coli (STEC strain, O157:H7) showing gram-negative rods — Escherichia coli STEC strain, O157:H7 Gram-negative rods

Gram stain microscopy of Finegoldia magna showing gram-positive cocci — Finegoldia magna Gram-positive cocci

Gram stain microscopy of Gardnerella vaginalis showing gram-variable pleomorphic rods — Gardnerella vaginalis Gram-variable pleomorphic rods

Gram stain microscopy of Kingella kingae showing gram-negative coccobacilli — Kingella kingae Gram-negative coccobacilli

Gram stain microscopy of Klebsiella pneumoniae showing gram-negative rods — Klebsiella pneumoniae Gram-negative rods

Gram stain microscopy of Kocuria rhizophila showing gram-positive cocci in tetrads — Kocuria rhizophila Gram-positive cocci in tetrads

Gram stain microscopy of Legionella pneumophila showing gram-negative rods — Legionella pneumophila Gram-negative rods

Gram stain microscopy of Listeria monocytogenes showing small gram-positive rods — Listeria monocytogenes Small Gram-positive rods

Gram stain microscopy of Micrococcus luteus showing gram-positive cocci in tetrads — Micrococcus luteus Gram-positive cocci in tetrads

Gram stain microscopy of Mycobacterium smegmatis showing poorly gram-staining acid-fast rods — Mycobacterium smegmatis Poorly Gram-staining acid-fast rods

Gram stain microscopy of Neisseria gonorrhoeae showing gram-negative diplococci — Neisseria gonorrhoeae Gram-negative diplococci

Gram stain microscopy of Neisseria meningitidis showing gram-negative diplococci — Neisseria meningitidis Gram-negative diplococci

Gram stain microscopy of Neisseria subflava showing gram-negative diplococci — Neisseria subflava Gram-negative diplococci

Gram stain microscopy of Proteus mirabilis showing gram-negative rods — Proteus mirabilis Gram-negative rods

Gram stain microscopy of Pseudomonas aeruginosa showing gram-negative rods — Pseudomonas aeruginosa Gram-negative rods

Gram stain microscopy of Salmonella enterica showing gram-negative rods — Salmonella enterica Gram-negative rods

Gram stain microscopy of Shigella flexneri showing gram-negative rods — Shigella flexneri Gram-negative rods

Gram stain microscopy of Shigella sonnei showing gram-negative rods — Shigella sonnei Gram-negative rods

Gram stain microscopy of Staphylococcus aureus showing gram-positive cocci in clusters — Staphylococcus aureus Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus auricularis showing gram-positive cocci in clusters — Staphylococcus auricularis Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus borealis showing gram-positive cocci in clusters — Staphylococcus borealis Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus capitis showing gram-positive cocci in clusters — Staphylococcus capitis Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus condimenti showing gram-positive cocci in clusters — Staphylococcus condimenti Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus epidermidis showing gram-positive cocci in clusters — Staphylococcus epidermidis Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus haemolyticus showing gram-positive cocci in clusters — Staphylococcus haemolyticus Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus hominis showing gram-positive cocci in clusters — Staphylococcus hominis Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus intermedius showing gram-positive cocci in clusters — Staphylococcus intermedius Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus lugdunensis showing gram-positive cocci in clusters — Staphylococcus lugdunensis Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus pasteuri showing gram-positive cocci in clusters — Staphylococcus pasteuri Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus pettenkoferi showing gram-positive cocci in clusters — Staphylococcus pettenkoferi Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus pseudintermedius showing gram-positive cocci in clusters — Staphylococcus pseudintermedius Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus saprophyticus showing gram-positive cocci in clusters — Staphylococcus saprophyticus Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus simulans showing gram-positive cocci in clusters — Staphylococcus simulans Gram-positive cocci in clusters

Gram stain microscopy of Staphylococcus warneri showing gram-positive cocci in clusters — Staphylococcus warneri Gram-positive cocci in clusters

Gram stain microscopy of Stenotrophomonas maltophilia showing gram-negative rods — Stenotrophomonas maltophilia Gram-negative rods

Gram stain microscopy of Streptococcus agalactiae showing gram-positive cocci in chains — Streptococcus agalactiae Gram-positive cocci in chains

Gram stain microscopy of Streptococcus anginosus showing gram-positive cocci in chains — Streptococcus anginosus Gram-positive cocci in chains

Gram stain microscopy of Streptococcus dysgalactiae showing gram-positive cocci in chains — Streptococcus dysgalactiae Gram-positive cocci in chains

Gram stain microscopy of Streptococcus mitis showing gram-positive cocci in chains — Streptococcus mitis Gram-positive cocci in chains

Gram stain microscopy of Streptococcus pneumoniae showing gram-positive diplococci — Streptococcus pneumoniae Gram-positive diplococci

Gram stain microscopy of Streptococcus pseudopneumoniae showing gram-positive diplococci — Streptococcus pseudopneumoniae Gram-positive diplococci

Gram stain microscopy of Streptococcus pyogenes showing gram-positive cocci in chains — Streptococcus pyogenes Gram-positive cocci in chains

Gram stain microscopy of Turicella otitidis showing gram-positive coryneform rods — Turicella otitidis Gram-positive coryneform rods

Gram stain microscopy of Vibrio cholerae showing gram-negative curved rods — Vibrio cholerae Gram-negative curved rods

Gram stain microscopy of Vibrio parahaemolyticus showing gram-negative curved rods — Vibrio parahaemolyticus Gram-negative curved rods

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