TABLE 1.

Results of biomonitoring, questionnaire, and work processes

Sample codeWork process(es)No. of B. cereus-like CFUaPresence of symptomsd
BiomonitoringFecesBefore monitoringOn day of monitoringDay after monitoring
171Watering with VectoBac8.5 × 103b,c 6.5 × 103103
166Packing0, 8.0 × 103
507Packing0, 0102+++
565Watering with VectoBac2.3 × 103, 2.7 × 103
302Packing (working in Vectobac-sprayed area sprayed day before)1.9 × 104, 2.2 × 104103
410Handling cuttings<103, 1.9 × 104+
412Planting cactus2.4 × 104, 8.3 ×103+++
413Handling cuttings1.0 × 103, <103+++
419Handling cuttings3.5 × 103, <103+++
421Watering with VectoBac4.0 × 104, 5.5 × 103102+++
429Handling cuttings, moving plants<103, <103+++
457Watering with VectoBac1.1 × 104, 2.2 × 104103
459Watering with VectoBac2.5 × 104, 1.9 × 104102
223Handling cuttings0, 5.3 × 103
573Handling cuttings, moving plants5.8 × 103, 0102+++
526Watering with Bactimos1.5 × 105, 1.4 × 104
244Watering with VectoBac1.5 × 103, 2.5 × 103102
246Packing<103, 2.5 × 103
525Cutting, packing2.0 × 103, 2.5 × 103
524Cutting, packing0, 1.6 × 104
  • a Determined on B. cereus selective substrate as mentioned in Materials and Methods.

  • b Monitoring data are listed with the CFU count from the filter, followed by the CFU count from the MultiDust foam disk from each individual.

  • c To get an estimate of the concentration of B. cereus bacilli in the air (CFU per liter), multiply the number by 195 (2 liters/min × 60 min/h × 7.5 h).

  • d +, symptoms present; −, symptoms absent.