1. ELISA

2. Serological test
Antibodies are specific for the antigen stimulated their production
Indirect ELISA
Patient serum ahs antibodies again a certain antigen
Patient has been expose to that pathogen

3. Antibodies against
HIV
Secondary antibodies
Against human
Antibodies.
Neisseria
gonorrhoeae
Enzyme linked
antibodies
Substrate – colorless
Product – blue

4. 6 patients
History suggests they might have picked up HIV.
Infects CD4
Virus sometimes becomes latent
No symptoms
Eventually virus destroys T cells
Susceptible to opportunistic infections

5. Transmitted through
Blood
Other body fluids (sexual contact)
Contaminated needle

8. 1/ / /10, / / /106
10, , ,000, ,000000

10. # microbes in 1g soil =
# colonies X reciprocal of the dilution
50 colonies
Dilution 1/10,000
(50) (10,000) =500,000 cells/gram of soil