translate English to French: Reliable bacteriological sampling of fish smaller than 4 cm in fork length is technically more difficult: such fish need be sampled only when unusual and unexplained mortality rates or disease signs are observed. b.
L s o sn dé vg di n ê e catl nspu lpéec daetpt gns e pi os ’ eae o ett éhn l né,ora r ne ’ n a oèe s l v r io s g s h bactériens selon un taux qui offre une probabilité de 95 % de déceler un spécimen cn m n dn u l e spoat u l t xdi et ndcl l et e5 au ot i as n o n upsn qe e a ’ f i ée b s d % a é t u n co ae minimum.