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Streptococcus bacteria can cause a sore throat or skin infection - Edexcel - GCSE Biology - Question 5 - 2018 - Paper 1

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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.

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Answer

  1. Wash hands after contact with the patient to prevent the spread of bacteria.
  2. Wear protective gloves or clothing to reduce the risk of direct contact with the patient.

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.

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Answer

To calculate the percentage increase, use the formula:

extPercentageIncrease=New Number−Old NumberOld Number×100 ext{Percentage Increase} = \frac{ \text{New Number} - \text{Old Number} }{ \text{Old Number} } \times 100

Substituting the values:

extPercentageIncrease=5943−28302830×100 ext{Percentage Increase} = \frac{5943 - 2830}{2830} \times 100

Calculating the difference:

5943−2830=31135943 - 2830 = 3113

Now substituting back, we get:

31132830×100≈110%\frac{3113}{2830} \times 100 \approx 110\%

Thus, the percentage increase is approximately 110%.

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