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Streptococcus bacteria can cause a sore throat or skin infection - Edexcel - GCSE Biology - Question 5 - 2018 - Paper 1
Question 5
Streptococcus bacteria can cause a sore throat or skin infection. An illness called scarlet fever can also develop during an infection with this bacterium. (a) Giv... show full transcript
Worked Solution & Example Answer:Streptococcus bacteria can cause a sore throat or skin infection - Edexcel - GCSE Biology - Question 5 - 2018 - Paper 1
Step 1
Give two precautions a doctor should take when treating a patient who is infected with Streptococcus.
Answer
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Wash hands after contact: It is essential for doctors to wash their hands thoroughly after coming into contact with an infected patient to prevent spreading the bacteria.
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Wear a protective mask: Using a mask can help protect the doctor from inhaling any potential infectious droplets that may be present.
Step 2
Calculate the percentage increase of the number of cases of scarlet fever between the periods September 2014 to March 2015 and September 2013 to March 2014.
Answer
To calculate the percentage increase, use the following formula:
ext{Percentage Increase} = rac{ ext{New Value} - ext{Old Value}}{ ext{Old Value}} imes 100
In this case, the old value is 2830 and the new value is 5943:
- Calculate the difference:
- Now use the values in the formula:
ext{Percentage Increase} = rac{3113}{2830} imes 100 = 110\%
Thus, the percentage increase in scarlet fever cases is 110%.