The page below is a sample from the LabCE course Bioterrorism: The Laboratory's Role and Response. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Suspicious Packages or Envelopes (continued)


  • Powdery substance felt through or appearing on the package
  • Oily stains, discolorations or odor
  • Lopsided or uneven envelope
  • Excessive packaging material such as masking tape, string, etc.
Other Suspicious Signs
  • Excessive weight
  • Ticking sound
  • Protruding wires or aluminum foil