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satellitism
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satellitism
satellitism is the pattern of arrangement of heamophillus influenzae on blood agar strearked with staphylococcus aureus in the centre.
This is because heamophillus influenzae requires 2 factors for its culture i.e 1) X FACTOR- heme or hematin and 2) V FACTOR - NAD ( found in the staphylococcusstreak in the centre.
It is observed as thick colonies at the centre near the streak and decrease daimeter progressively towards the periphery ( due to decreased levels of NAD).
This is because heamophillus influenzae requires 2 factors for its culture i.e 1) X FACTOR- heme or hematin and 2) V FACTOR - NAD ( found in the staphylococcusstreak in the centre.
It is observed as thick colonies at the centre near the streak and decrease daimeter progressively towards the periphery ( due to decreased levels of NAD).
sakia fazal (2007M041)- Posts : 4
Join date : 2008-11-15
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