Table 1.

Effect of antibiotic mixture concentration on the culturable midgut bacteria of third-instar L. dispar

Antibiotic concentration, μg/ml of diet*Enterococcus sp., cfu per gutEnterobacter sp., cfu per gut
04.80 × 106 5.21 × 105
81.17 × 105 6.08 × 107
16nd1.13 × 108
311.00 × 101 1.67 × 101
631.30 × 105 2.50 × 104
1255.33 × 101 nd
250ndnd
500ndnd
  • nd, not detected.

  • *Larvae were reared on sterile artificial diet amended with an antibiotic mixture composed of 500 μg each of penicillin, gentamicin, rifampicin, and streptomycin per ml.