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Methodes d'évaluation de la biomasse

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Cellule <strong>de</strong> Petroff-Hausser<br />

25 carrés couvrent une surface <strong>de</strong><br />

1mm2.<br />

On compte les bactéries (x) dans<br />

quelques carrés pris au hasard (n).<br />

Nbre total <strong>de</strong> bactéries dans 1mm2<br />

X = (x/n) 25<br />

La chambre a une profon<strong>de</strong>ur <strong>de</strong><br />

0,02mm ( Volume: 0,02mm3)<br />

Bactérie/mm3 = (x/n) 25 . 1/0,02<br />

1mm3 = 1µl

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