6.1 Bacteria and Viruses

The Oregon Barbering Examination Information Bulletin (revised October 25, 2019) lists Microbiology as 4 of 100 theory questions — 4 percent — covering bacteriology: viruses, immunity, parasites, and bacteria. Those four items look small next to Barbering Services (42) or Anatomy and Physiology (25). They are not small in Salem. The same facts feed Safety and Infection Control (6 theory questions on Occupational Safety and Health Administration (OSHA), Food and Drug Administration (FDA), Environmental Protection Agency (EPA), and Centers for Disease Control and Prevention (CDC) standards) and the 90-question Oregon Laws and Rules Examination, where Facility Standards is 35 items. A candidate who treats microbiology as four flashcards and then guesses at high-level disinfectant on the laws paper is studying the wrong exam.

The Health Licensing Office (HLO) draws theory from Milady's Standard Professional Barbering, 5th Edition (2011) and Pivot Point Barbering Fundamentals, 1st Edition (2018). Oregon then maps those textbook organisms onto Oregon Administrative Rule (OAR) Chapter 817: what a high-level disinfectant is, which tools must be immersed, and why bloodborne-pathogen training is now a renewal attestation.

Why bacteria and viruses matter on the Oregon exams

You are not tested so you can prescribe antibiotics. You are tested so you can tell a pathogenic organism from a harmless one, a local infection from a general infection, a virus from a bacterium, and a razor that needs high-level immersion from a comb that needs 1,000 parts per million (ppm) of quaternary ammonium compound (quats). OAR 817-005-0005 defines disinfect as using a process to destroy harmful organisms, including bacteria, viruses, germs, and fungi. Soiled means an article that has been used and has not been cleaned or disinfected for use on the next client. Pathogenic load plus a soiled razor is how a pustule on one face becomes the next client's problem.

Pathogenic versus nonpathogenic bacteria

Bacteria are one-celled microorganisms. Nonpathogenic bacteria are harmless or helpful in the right setting — for example, organisms that help break down organic matter. The Oregon exams care about pathogenic bacteria: the disease-causing ones that live on skin, hair, implements, and soiled towels. Nonpathogenic does not mean “skip the jar.” You still clean and disinfect every tool used in the field of practice before the next client (OAR 817-010-0068).

Cocci, bacilli, and spirilla

Textbook bacteriology classifies pathogenic bacteria by shape. Learn the names; the laws exam will not draw the picture for you.

Cocci are round. They rarely show independent movement. They travel on dust, implements, capes, and skin-to-skin contact.

• Staphylococci form grape-like clusters. They produce pus and are the usual cause of abscesses, pustules, and boils. Staphylococcus aureus is the organism behind many shop-relevant skin infections, including methicillin-resistant strains discussed in OSHA bloodborne material.
• Streptococci form chains. They are associated with strep throat and blood poisoning (septicemia).
• Diplococci grow in pairs and are associated with pneumonia.

Bacilli are rod-shaped and are the most common bacteria in textbook lists. They include the organisms of tetanus, typhoid fever, tuberculosis, and diphtheria. Spirilla are spiral or corkscrew-shaped; textbook examples include the organisms of syphilis and Lyme disease.

Movement and spores

Bacilli and spirilla can move with flagella (hair-like extensions; some texts also say cilia). Cocci generally do not. Movement is a classification fact on the theory paper. It is not a reason to skip disinfection. A motile bacillus on a damp towel is still a soiled-article problem under OAR 817-005-0005.

Some bacilli form spores — a hard, protective coating that lets the organism survive drought, heat, and many chemical disinfectants. Spore formers are why barbering textbooks distinguish disinfection (destroys most harmful organisms on a nonliving surface) from sterilization (destroys all microbial life, including spores). Oregon does not require every shop to run an autoclave. OAR 817-010-0068 lets an authorization holder disinfect or sterilize tools before each client. If sterilization equipment is used, it must be a steam sterilizer, dry-heat sterilizer, or autoclave that is registered and listed with the FDA, used per the manufacturer's instructions. For everyday Oregon barbering, the Board's substitute for “kill the hard bacterial target on a sharp” is not a guess at 70 percent alcohol. It is high-level disinfectant: a chemical agent that has demonstrated tuberculocidal activity and is registered with the EPA (OAR 817-005-0005). Tuberculosis bacilli are the textbook hard target. A product that is EPA-registered but not tuberculocidal is low-level disinfectant — bactericidal, germicidal, fungicidal, and limited virucidal — and it is not enough for razors.

Local versus general infection

A local infection is confined to one area — a pimple, a boil, a razor-nick pustule. A general infection (systemic) is carried through the bloodstream. The shop implication is the same on both written exams: do not shave or clip over an active, draining, or undiagnosed lesion; wash hands immediately before and after each client (OAR 817-010-0008); and never put a soiled sharp back in the drawer for the next face.

Viruses, including bloodborne pathogens

A virus is a submicroscopic particle that infects a living host cell. Antibiotics do not kill viruses. Barber-relevant viruses include hepatitis B virus (HBV), hepatitis C virus (HCV), human immunodeficiency virus (HIV), human papillomavirus (HPV), and herpes simplex virus (HSV).

HBV, HCV, and HIV are bloodborne pathogens. They travel in blood and other potentially infectious materials (OPIM). A nick during a close shave, a clipper bite, or a contaminated straight razor is the exposure path. Standard barbering texts treat HBV as the hardier bloodborne virus on environmental surfaces; HIV is more fragile outside the body. Do not use that comparison as permission to skip disinfection. Oregon's answer is chemical process plus BBP training, not a guess about how long a virus “probably” lived on the blade.

That is why Oregon requires bloodborne pathogens (BBP) training for field-of-practice certificate renewal on or after July 1, 2025, under Senate Bill 217 and OAR 817-008-0000. You attest at renewal that you hold current BBP training. Do not mail the card to HLO. Keep the documentation five years following the renewal. If HLO audits you, you have 30 calendar days from the notification date to produce it. HLO's Board of Cosmetology FAQ states BBP certifications are valid for one year and must be taken each year. This chapter's theory items still ask what HBV, HCV, and HIV are. The renewal rule asks what you do about them after you pass.

HPV (warts) and HSV (cold sores, fever blisters) live on the face and lips. Do not shave over vesicles, open sores, or warty growths. A razor that nicks a herpes vesicle can seed new lesions along the shave path and contaminate the next client if the blade is not discarded or the reusable handle is not cleaned and high-level disinfected. Stop, refer, and protect the implement. Oregon Revised Statute (ORS) 690.005(2) keeps barbering cosmetic, not a medical treatment of viral disease.

Oregon high-level versus low-level disinfectant

OAR 817-005-0005 also defines sharp-edged or pointed, non-electrical tools and implements as items that may contact bloodborne pathogens, including razors and shears.

OAR 817-010-0068 (nonelectrical tools) is a sequence, not a splash:

1. Remove all hair and all foreign material.
2. Clean thoroughly with soap or detergent and water.
3. Rinse thoroughly with clear, clean water.
4. Then either completely immerse sharps (razors, shears, and other edged or pointed tools) in high-level disinfectant per the manufacturer's instructions; or completely immerse non-sharps (combs, brushes, rollers, rods) in 1,000 ppm of a commercial quat or other low-level disinfectant per the manufacturer's instructions; or sterilize with approved FDA-listed equipment.

OAR 817-010-0069 (electrical tools): all electrical tools except clipper blades are cleaned of hair and then disinfected with low-level disinfectant. Electrical clipper blades must be disinfected before each use by removing hair and completely saturating the blade with a high-level disinfectant solution, spray, or foam per the manufacturer's instructions. Blades may instead be sterilized by an approved method.

A wipe of the clipper housing is not a substitute for saturating the blade. A 1,000 ppm quat jar is not a substitute for high-level immersion of a straight razor. Alcohol on a towel is not Oregon's high-level definition.

A Bend chair and a soiled razor

Marco, a certificate holder in Bend, finishes a head shave, wipes the straight razor on a towel, and drops it in a jar of leftover 1,000 ppm quats because the high-level jug is empty. The next client wants a fade and a neck shave. On the theory paper that is a spore-and-bloodborne miss. On the laws paper it is an OAR 817-010-0068 miss: a sharp implement must be cleaned, rinsed, and immersed in high-level (EPA-registered and tuberculocidal) disinfectant, not parked in a low-level comb jar. Marco's shop story — “we have never had a problem” — does not replace the rule. The four microbiology items are how HLO checks that you know why the jug on the counter has to be the tuberculocidal one.