environmental and nutritional diseases air pollution toxic exposure –air –water –work/domestic...
TRANSCRIPT
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Environmental and Nutritional Diseases
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• Air pollution• Toxic exposure
– Air– Water– Work/domestic
• Sun light and radiation• Trauma• Self induced
– Tobacco– Drugs
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Indoor vs. Outdoor
• Indoor – Radon– East Coast– Tobacco– Off-gassing
• Outdoor– Gasses– Particulates– Increased UV
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Air Pollution
• Great scale– In door– Out door– Ozone– Chemicals
• 10,000 – 20,000 liters• Particle size
– 5-10 microns bronchi– 1-2 microns alveoli
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Dealing with the Agent
• Filtration• Mucus• Cough reflex• If too small
– Can’t remove– Scarring and
alveolar damage
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Emphysema
• Proteolytic damage– Activation of
inflammatory enzymes– Decreased inhibition
• Small airways • Alveoli• Loss of surface area
for gas exchange
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Lung Changes of Emphysema
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Asthma
• Hypersensitivity type I• Air passages• Bronchoconstriction• Permanent small
airway narrowing• Many allergens
– Pollens– Mold spores– Dander
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Hypersensitivity Pneumonitis
• Interstitial tissue• Molds and chemicals• Injury to alveolar
lining cells• Fibrosis
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Pneumoconiosis
• Scarring secondary to inhaled particulates– Coal– Silica– Cotton fibers
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Lung Cancer
• Tobacco smoke• Secondhand tobacco• Industrial agents• Radon
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Tobacco Smoke
• Firsthand• Secondhand• Types of injury
– Carcinogens– Cell irritants & damage– Poisons– Drug related
• Diseases– Multiple cancers– Atherosclerosis
• Penile dysfunction
– Emphysema– Bronchitis
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Tobacco related tumors
• Squamous cell carcinoma of lung
• Bladder cancer• Gastric cancer• Pancreatic cancer
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Lead
• Paint• Industrial• Absorption variable• Organs
– Brain & peripheral n.– Bone marrow– Kidney tubules– Long bone growth
centers in children
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Silicates and other Particulates
• Silica– Industrial– Sand on the streets– Scarring
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Silica Scar
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Alcohol Related
• Ethanol & others• May help lipid metab.• Cellular toxin• Acute & Chronic• CNS depressant
– Depresses inhibitions
• Liver cell injury– Acute fatty liver– Cirrhosis– Fat soluble vitamins
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Metabolism of ethanol
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Drug Abuse
• Crack Cocaine– Arrhythmia– Dissecting aorta
• IV drugs– Respiratory death– Endocarditis
• Social and economic• HIV
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Cocaine
• Inhibits uptake of transmitter
• Stimulatory– Hypertension– Arrhythmia– MI– Stroke– Dissection of aorta
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Aortic Dissection
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Pulmonary Edema
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Pulmonary Edema
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Endocarditis
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Physical Agents
• Mechanical injury– Abrasions– Contusions– Lacerations– Incised wounds– Penetrating wounds
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Ecchymosis
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Thermal Injury
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• Radiation effects
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Nutritional Diseases
• Too little nutrient• Isolated deficiency is rare• Too much nutrient
– “With French Fries?”
• How did it come to happen– Dietary related– Refined out of diet– Absorption problem– Utilization
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Protein deficit, Kwashiorkor
• Second child• Edema• CNS• Skin and hair
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Marasmus
• Lack of calories• Stunting• Loss of
subcutaneous fat• Muscular atrophy
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Obesity
• Hypertension– 6 miles of capillaries
• Insulin resistance• DM type II• High serum lipids• Atherosclerosis• Gallstones• Osteoarthritis
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Specific Vitamin Deficiencies
• Fat soluble vitamins– K, A, D, & E– Problems of absorption– Pancreatic insufficiency– Liver disease– Multiple deficiencies
• Water soluble vitamins– B-complex– C– Dietary absence– GI related
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Vitamin A
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Bitot’s Spot
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Keratomalacia
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Epithelial Changes
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Epithelial Changes
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Night Blindness
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Vitamin D
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Vitamin D Deficincy
• Skin in most adults– Renal and liver steps
• Fish oils• Rickets in children• Osteomalacia in adults
– Fractures
• Excess leads to hypercalcemia– Renal stones
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Vitamin K Deficiency
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B Complex
• Water soluble
• Green vegetables
• Cereals
• Deficiency states– Starvation– Refinement of food– Alcoholics
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Thiamine Deficiency, Beri Beri
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Thiamine Deficiency, CNS
• Alcoholism• Wernicke’s
encphalopathy– Physical abn.– Mamillary body
necrosis
• Korsakoff’s– Psychiatric– Confabulation
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Niacin, Pellagra
• 3 D’s of Pellagra– Dermatitis– Diarrhea– Dementia
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Commercial Message
• In keeping with fat soluble vitamins.
• Fish oil supplements and the like.
• The John West Red Salmon Company
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Vitamin C
• Citrus and vegies
• Function– Water soluble free radical scavenger– Helps absorb Fe and Cu (in reduced state)– Collagen metabolism
• Hydroxylation of lysine and proline• Scurvy
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Vitamin C deficiency
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Vitamin C deficiency
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Vitamin C deficiency
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