Bird influenza is an emerging disease. If you were given the task of using Koch's postulates of finding the pathogen causing bird flu, what sequence of procedures should you use?

A. (1) Inoculate a healthy bird with the suspected pathogen to see whether it becomes sick, (2) compare symptoms of that bird with those from a bird known to have the disease, (3) isolate the pathogen from both birds in pure culture and stain them to see whether they are both Gram-positive, and (4) make a vaccine from the pure culture of one bird and inject it into another to see if it recovers.
B. (1) Take blood samples from a sick bird, (2) isolate the pathogen in pure culture, (3) treat the bird for the disease and when it recovers take a second blood sample, and (4) test the blood to check whether it no longer contains the pathogen.
C. (1) Inject a bird with the suspected pathogen, (2) inject another bird with a control that doesn't contain the suspected pathogen, (3) repeat with more birds, and (4) plate out samples of blood from both kinds of birds to see if you can isolate the pathogen in pure culture.
D. (1) Isolate in pure culture the suspected pathogen from sick birds, then (2) use a series of medications to treat the sick birds, (2) select the medication that worked best, (3) apply that medication to pure cultures of the pathogen, and (4) see whether it kills the pathogen, compared to control treatments without the medication.
E. (1) Check whether the presence of the suspected pathogen correlates with the occurrence of symptoms, then (2) isolate the pathogen from an infected bird and grow it in pure culture, (3) inoculate cells from pure culture into a healthy host to see whether it causes the disease, and (4) attempt to isolate the suspected pathogen from the inoculated host.


E. (1) Check whether the presence of the suspected pathogen correlates with the occurrence of symptoms, then (2) isolate the pathogen from an infected bird and grow it in pure culture, (3) inoculate cells from pure culture into a healthy host to see whether it causes the disease, and (4) attempt to isolate the suspected pathogen from the inoculated host.

Biology & Microbiology

You might also like to view...

Not all vertebrates are considered chordates because not all of them possess tails as adults.

a. true b. false

Biology & Microbiology

The difference between a single nucleotide polymorphism (SNP) and a point mutation is that:

A. a point mutation becomes permanently incorporated into the genome, whereas a SNP does not. B. a SNP becomes permanently incorporated into the genome whereas a point mutation does not. C. a point mutation can be corrected by various repair mechanisms, whereas a SNP cannot. D. a SNP can be corrected by various repair mechanisms, whereas a point mutation cannot. E. a point mutation is when a base pair is changed to a different base pair, whereas a SNP is when the base pair differs among individuals in a population.

Biology & Microbiology

Bovine spongiform encephalopathy is an example of a prion disease

Indicate whether the statement is true or false

Biology & Microbiology

_________________ is the process that results from the union of gametes from two different parents.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology