Avirulence study was performed using staphylococcus aureus in mice. it was determined that the ld50 for the s. aureus alpha-toxin was 0.045 µg/kg of body weight toxin (a relatively low ld50). in the same mouse population, the id50 was determined to be 200,000 cells (a relatively high id50). what do these results taken together mean?

S. aureus strain is less infectious, but its alpha-toxin is highly-toxic.

Explanation:

Given data:

LD50 for S. aureus alpha toxin 0.45 \mu g/kg

ID50 for same mouse density found to be 200,000

From the data information given above Staphylococcus aureus was done on mice. The result show that LD50 is found to be 0.45\mu g/kg and ID50 found to be 200,000 on same mouse population

the result taken together mean that S. aureus strain is less infectious, but its alpha-toxin is highly-toxic.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2