In Gram-stained preparations, M. atlantae will appear as:
a. either gram-negative coccobacilli or short, broad rods that tend to resist decoloriza-tion and may appear gram-variable.
b. gram-negative cocci in pairs or short chains.
c. coccobacilli or medium-sized rods.
d. coccobacilli that may appear in chains.
A
Other than Gram stain of patient specimens, no specific procedures are performed for the direct detection of these organisms in clinical material. M. atlantae, Moraxella nonliquefaciens, and Moraxella osloensis may appear either as coccobacilli or as short, broad rods that tend to resist decolorization and may appear gram-variable. This appearance is also evident for M. canis, which appears as cocci in pairs or short chains. M. lacunata is a coccobacillus or medium-sized rod, and Moraxella lincolnii is a coccobacillus that may appear in chains. All subspecies of Neisseria elongata are either coccobacilli or short, straight rods, and Neisseria weaverii is a medium-length, straight bacillus.
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