Gram-positive rods

Variation in the magnesium (Mg) content of the medium may exert a marked effect on cell division of some bacteria. In a Mg-deficient medium, Gram-positive rods grow in the form of long filaments. Such filaments revert to normal forms when transferred to the same medium supplemented with suitable concentrations of Mg. Filament formation is enhanced by the addition of zinc and cobalt. Inhibition of cell division occurs also in media supplemented with an excess of Mg. 

If any Gram-positive rods survive the heat shock, further testing is required. 

Endospore-forming gram-positive rods and cocci. Aerobic Bacillus (B. anthracis, anthrax), anaerobic Clostridium (C. tetani, tetanus C. botulinum, botulism)... 

Major constituent of normal vaginal flora, facultative or anaerobic gram-positive rods increased numbers during pregnancy, during ovulation, at menopause, and during steroid treatment... 

Micrococcus sedentarius Actinomyces pyogenes (gram-positive rods, ++ -R... 

Gram-negative rods were the most sensitive to this effect, Gram-positive rods much less so, and spherical bacilli (cocci) not at all. Forming afil-... 

Tetanus is a condition characterised by prolonged, involuntary contraction of the skeletal muscles. The condition can be localised or generalised. Tetanus is caused by the bacterium Clostridium tetani, an obligate, anaerobic, Gram-positive rod-shaped bacterium. The pathogen produces an exotoxin called tetanospasmin. Tetanospasmin is a potent neurotoxin which blocks neurotransmitter release from inhibitory neurons resulting in muscular contractions. C. tetani is not an invasive microbe, rather the spread of the toxin is due to... 

The gram-positive rods or cocci of the order Methanobacteriales [3] and of the genus Methanopyrus [4] possess an electron-dense cell wall sacculus, mostly 15-20 nm in width,... 

Desulfotomaculum species are gram-positive, rod shaped, spore-forming SO -reducing bacteria that as a group display wide phylogenetic diversity (Rabus et al., 2000). They are also quite... 

Liver involvement is reflected in moderately elevated transaminases, histologically detected monohistiocytic granulomas and miliary microabscesses (frequently with gram-positive rods) as well as occasional evidence of non-specific reactive hepatitis. (91, 93) (s. fig. 24.13)... 

Gram-positive, filamentous rods Gram-positive rod, aerobic, spore-former... 

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