[Le-Roy]

Sabertooth painted a scenario in #28 that I would like to see discussed by medicos.

Would candy-bars injected w/smallpox be an effective medium for transmission?

[Brian Kopp DPM]

A little basics on viral disease transmission. Many viral diseases are transmitted via fomites:

fomite

SYLLABICATION: fo·mite
PRONUNCIATION: fmt
NOUN: An inanimate object or substance that is capable of transmitting infectious organisms from one individual to another.
ETYMOLOGY: Back-formation from New Latin fmits, pl. of Latin fmes, tinder, from fovre, to warm. See dhegwh- in Appendix I.

In other words, you touch something, get the virus on your hand, then touch you face, mouth, nose or other mucus membrane.

Candy wrappers would be a perfect fomite because the act of handling the candy wrapper occurs immediately before the contact with the mouth.

In other words, no need to inject anything.

Just a light dusting of smallpox virus in the form or a powder. If done correctly it would be undetectable.

And unlike anthrax, which requires thousands of huge bacterial spores be inhaled into the lungs, relatively few microscopic smallpox viruses would be required. And nasal exposure would be sufficient to cause full blown infection, whereas nasal exposure with anthrax is relatively harmless.

No trick or treating for my kids this year.

• Contact with fomites:
  1. Indirect contact transmission is a form of contact transmission where transmission occurs from a reservoir via inanimate objects.
  2. These objects generally are referred to as fomites.
  3. Fomites are basically almost anything an infected individual (or reservoir) can touch, upon which can be left a residue of contagious pathogen.
• Exceptions include the various inanimates referred to as vehicles:
  1. food
  2. air
  3. liquids
• Typically it is more difficult to avoid indirect contact transmission than it is to avoid direct contact transmission.
• A certain degree of organismal durability may be necessary to survive passage on a fomite.
• The best way to prevent indirect contact transmission is by:
  1. avoiding contact with fomites
  2. avoiding contact of hands with mucous membranes especially when handling or potentially handling fomites
  3. the use of barriers when handling fomites
  4. disinfecting fomites before handling

[Brian Kopp DPM]

I started a new thread on this question:

SMALL POX AND HALLOWEEN CANDY- A short primer on viral disease transmission