2/19/99

Public Health

 

Drugs of Abuse Potential

·         Handout        18-explanation

19-20 questions

20-list of classification schedule; CSA (Controlled Substance Act) put forth by the DEA(drug enforcement agency); CSA-I – CSA-V

CSA-I—have most abuse potential and no medical application, most deadly; most likelihood for being addictive; highest dependence potential

 

CSA-V—least abuse potential; often have medical application; least likely to be addictive/dependence potential

·         Know the category the drug belongs to :  narcotics, cannabis, depressants, stimulants, halucinagens

·         How consumed

·         Medical use-what is it

 

 

Worms

·         Can be found almost anywhere in the body

·         Know where each worm can be found in the body from handout 18

·         Unique biological  ways to enter human system

·         Unique survival ways to survive defense mechanisms

·         Ex:  penetrate through the skin, can be ingested, can become blood borne and move to other parts of the body, penetrate tissues and organs

·         Have ability to survive in our system by virtue of having a very thick cuticle (covering) which is not digested by enzymes in our system

·         Many reproduce at an enormous rate and often time 99% of the larvae are expelled from the body, the 1% that remains is enough to cause problems for the host

·         Larvae may be source of disease

·         Ability to penetrate, cut, attached by having hooks, cutting plates that help them to remain in the system

·         Most cause disease by physical obstruction or damage to organs by their presence and the growth rate—blocking the passages; a few produce toxins that can by involved in pathogenicity

·         Some have vegetative reproduction—cloning, Planaria can be cut into pieces and regenerates the missing portions to create a complete organism

·         Many are hermaphrodites—has both male and female sex organs on the same animal

 

Trichinosis

·         In many larval stages cause sickness.  Larvae many be bigger than the adult form.

 

Necator Americanus—New World hook worm