A cerebral spinal fluid sample from a patient potentially infected with Eastern Equine Encephalitis virus is classified as which category?

A cerebral spinal fluid sample from a patient potentially infected with Eastern Equine Encephalitis virus is classified as which category?

• A. Category A Infectious substance
• B. Category B Infectious substance
• C. Exempt patient specimen
• D. Not regulated

Answer: (B)

The main idea is how infectious substances are categorized for shipping based on what the material actually contains. A patient specimen, like cerebrospinal fluid, that is suspected of containing an infectious agent but is not known to contain a highly dangerous agent is shipped as Category B (UN 3373). Category B covers diagnostic specimens that may harbor infectious substances but do not meet the criteria for Category A, which applies only when the substance is known or reasonably believed to contain a highly dangerous agent in a form that could cause severe disease on exposure.

So, even though Eastern Equine Encephalitis virus is serious, a CSF sample obtained for diagnosis is treated as Category B because it is a clinical specimen awaiting test results, not a pure culture or confirmed high-risk material. This dictates the packaging requirements (triple packaging with absorbent, leak-proof inner and outer containers) and labeling for Category B. If the sample were confirmed to contain a Category A agent, then Category A packaging would be required.