Test 2 Flashcards
MCS (toxicant-induced loss of tolerance)
sensitivity or intolerance to a number of chemicals and other irritants at very low concentrations
Sick building syndrome
a collection of symptoms reported
by workers in a given building for which no
cause is apparent.
Building related Illness
symptoms due to being in building with an identifiable cause
Natural Gas location and sx
- formed when layers of buried plant and animal is exposed to intense heat and pressure over thousands of year
- hydrocarbon mostly methane
- respiratory sx
- lower WBCs, higher RBCs, Hct, Hgb, and platelets
What are VOCs
any carbon-based compounds that readily enter a gaseous state
Benzene found in
- volcanoes
- forest fires
- a natural part of crude oil, gasoline, and cigarette smoke
- refinery emissions, motor vehicle exhaust
- glues
- paints
- furniture wax
- detergents
Benzene health effects
- Drowsiness
- Dizziness
- Rapid or irregular heartbeat
- Headaches
- Tremors
- Confusion
- Unconsciousness
- Death (at very high levels)
- Vomiting
- Irritation of the stomach
- Sleepiness
- Convulsions
Chronic
- bone marrow and immune suppression
- irregular menses and decreased size of ovaries’
- leukemia
Toluene
methylbenzene
Toluene location
- plastic soda bottles
- synthetic fragrances
- inks
- cleaning agents
- nylon
- paint thinner
- gasoline
- coatings
- adhesives
- cigarette smoke
Toluene health effects
- CNS
- fatigue
- sleepiness
- headaches
- nausea
- developmental effect in children of pregnant women
- chronic inhalation
- Irritation of the upper resp. tract and eyes, sore throat, dizziness, and headache
Xylene
Aromatic hydrocarbon aka dimethylbenzene
Xylene health effects
- depression of CNS
- Headache
- Dizziness
- Nausea
- Vomiting
- Irritation to the lungs that cause chest pain and SOB
- liver and kidney damage at high levels
- HEENT irritation
- irritation and dermatitis
- can penetrate most clothing
Phenol
carbolic acid
White volatile crystalline solid
Phenol locations
- petroleum
- conversion to precursors of plastics
- Bisphenol-A
- Phenolic resins
- Aspirin
- Herbicides
- Chloraseptic and Carmex
Phenol health effects
- Corrosive to eyes, skin, and resp tract
- dermatitis
- lung edema
- seizure
- coma
Formaldehyde
- Formalin, Formol, Methyl Aldehyde
- CH2O
- Colorless
- Flammable
- Pungent, irritating odor
Formaldehyde location
- Adhesives, glues, dyes
- biopsy containers
- Carpet, particle board, plywood
- Paper products
- Germicide, Embalming Fluid
- Fertilizer & food production
- “Wrinkle-free” clothing, Cosmetics
- Petroleum exhaust, tobacco smoke
Formaldehyde health effects
- Bronchitis, pulmonary edema, asthma (only upper respiratory tract)
- Sinonasal & nasopharyngeal carcinoma
- Leukemia
Vinyl chloride
Chloroethene
Vinyl Chloride Monomer (VCM)
#3
Location of Vinyl chloride
new car smell
PVC
multiple VC
What is the route of administration of VOCs?
inhalation, ingestion, transdermal absorption
MCS risk factors
- upper SES
- Caucasian
- middle age female
- males
- fibromyalgia
- chronic fatigue syndrome
- psychiatric/mental health condition
MCS diagnosis
- Sx are reproducible with repeated chemical exposures.
- Condition has persisted for significant period of time.
- Low levels of exposure result in manifestations of the syndrome (i.e. increased sensitivity).
- Sx improve when the triggering chemicals are removed.
- Responses often occur to multiple chemically unrelated substances.
- Symptoms involve multiple-organ symptoms
Sick building syndrome sx
- Fatigue, H/a, Nausea
- EENT irritation
- Chest tightness, Asthma
- Concentration, Memory-loss
Xylene location
- histology labs for tissue processing
- petroleum, coal, and wood tar
- solvent
- Occupational (mechanics)
- Leaking underground storage tanks
PVC use
- Plastic pipes, Insulation,
- Vinyl siding (Houses)
- window frames
- garden hosing
- medical tubing
- carpeting
- vinyl flooring
combined with phthalates
- Shower curtains
- Packaging – Clear plastic casing (hard) & shrink-wrap (soft)
- Toys (Child & Adult)
- Clothing (Pleather)
PVC health effects
- Demyelinating Neuro-toxin: Dizziness, Fatigue, Neurasthenia, Ataxia
- Respiratory & Mucous Membrane irritants
- Highly Hepatotoxic/Carcinogenic
- Hepatic Angiosarcoma
- Portal Hypertension & Cirrhosis
- esophageal variances
- Purpura & Thrombocytopenia
- Synergy (30-700%) w/ co-morbid conditions: Alcohol intake, Hep C, Tobacco Smoking
- Raynaud’s Phenomenon: Vasospasm of distal extremities
- acroosteolysis: Dissolution of terminal phalanges & SI Joint
- Scleroderma-like skin changes
Polycyclic Aromatic Hydrocarbons (S-VOC) (PAH)
Multiple conjoined benzene rings
stay in environment for a while
What are the two PAHs
naphthalene
benzo(a)pyrene
How are PAHs absorbed?
- skin
- lungs via respiratory particles
- GI tract
How do you test for PAHs? Dose high levels correlate to harm?
urine hydroxypyrene levels
no
Naphthalene
Low Molecular Weight (LMW)
- 2-3 rings (e.g. Naphthalene)
- Aka Tar Camphor
- C10H8
- White solid
- Flammable
- Volatile Aromatic
- Unstable molecule
- Does not linger in the environment
naphthalene found in
- Ingredient of Mothballs
- Industrially produced as a by-product of coal processing (coal tar)
- an industrial by-product in manufacturing (e.g. PVC)
- home-based combustion (Wood, Propane)
Naphthalene health effects
- hemolytic anemia
- Fatigue, Pallor
- Decreased Hgb & Hct
- Heightened concern for people with known anemia conditions (Sickle cell, G6PD)
- Nausea, vomiting, diarrhea, hematuria, jaundice, renal failure
- Respiratory Irritant
Benzo(a)pyrene
higher molecular weight
- 4-7 rings (e.g. Benzo(a)pyrene)
- C20H12
- 5 rings
- can form Heterocyclic Amines (HCA)
Benzo(a)pyrene found in
- Fossil Fuels
- Charred/ Grilled Food
- Tobacco Smoke
Benzo(a)pyrene health effects
- cancer
- Lungs
- Prostate
- Pancreas
- Stomach
- Colon
- Rectal
Benzo(a)pyrene MOA of disease
- Flat, planar structure of HMW PAH molecule
- Slips into Double Helix
- Interference with normal genetic processes (Transcription, etc…)
- Inhibits p52 tumor suppressor gene
Benzo(a)pyrene treatment
stop smoking or grilling
brassicas
antioxidants
vit E
marinade foods
What are the health effects of smoke?
- lung cancer
- bronchitis
- asthma
- SOB
- CVD
- otitis media
- decreased immune function
What factor affect smoke exposure?
- exposure concentration
- size of room
- number of smokers
- air patterns
What is continine?
tobacco smoke a metabolite of nicotine
how do you test for continine and the purpose of testing?
- urine test
- blood, saliva, hair
- to monitor tobacco cessation
- tracking exposure
what are natural plastics?
- lignin
- rubber
- silk
what are synthetic plastic/polymers?
very large molecules composed of repeating small monomers
- nylon
- latex
- acrylic
- polyester
thermoplastics
- the main type of consumer plastics
- formed by melting the raw material of solid plastic resin and forming it into products
- can be melted again theoretically
thermoset plastics
- liquids that are set by the use of a catalyst
- in computer casting, synthetic rubber tires, fiberglass boats, surfboards
- can break into small bits and persist in the environment
Derivation of platics
- petroleum
- natural gas feedback
- coal
- corn
- soy
- sugar cane
What is #1 plastic?
polyethylene terephthalate
What is #2 plastic?
high density polyethylene
What is #3 plastic?
polyvinyl chloride
What is #4 plastic?
low density polyethylene
What is #5 plastic?
polypropylene