In the chain of transmission, Sarah is the susceptible host, and Streptococcus pneumoniae is an infectious agent.
What disease does Streptococcus pneumoniae cause?
Streptococcus pneumoniae generally causes pneumonia that infects the lungs. It can also cause meningitis which usually involves the inflammation of the coverings of the brain and spinal cord.
Most of the Streptococcus species can cause disease but only a few of them provoke the majority of pneumococcus infections.
Sarah has been eating and sleeping poorly. Such consistent habits significantly decline her immune system. In this chain of transmission, she has been drastically affected by Streptococcus pneumoniae which is known as the infectious agent. It is considered a pathogen that is capable of causing disease in humans.
Therefore, in the chain of transmission, Sarah is the susceptible host, and Streptococcus pneumoniae is an infectious agent.
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