CAIE IGCSE Biology 16.6.5 Controlling the Spread of STIs
Practise selecting and explaining barrier, testing, education and treatment measures that reduce STI transmission.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Practise selecting and explaining barrier, testing, education and treatment measures that reduce STI transmission.
Chlamydia is a sexually transmitted infection (STI) that is caused by a bacterium.

Fig. 2.1 shows the number of chlamydia cases in a country in 2018.
Describe how the spread of STIs, such as chlamydia, can be controlled.
any four from:
abstain from sexual contact ;
condoms / femidom ;
testing / screening ;
contact tracing ;
education (about, risks / how it is transmitted / prevention) ;
use of antibiotics ;
no sharing of needles ;
using screened blood for transfusions ;
vaccination ;
AVP ;