Infection

4. The process of foreign organisms invading and multiplying in or on a host organism
5. A source of infection including things like food, soil and objects we touch
6. The type of spread where infectious agents are spread through sneezing, coughs or breathing out
8. When the host has recovered from the infection but is still shedding
10. The route of infection when colonic bacteria enters the female urinary tract
13. The route of infection which is usually caused by poor hygiene
14. Things we can contract an infection from including animals, insects and other humans
15. The organ where infectious agents can be transmitted directly into the host

1. Someone who harbours the pathogen for long periods of time but shows no symptoms (7,7)
2. An example of this route of infection is the spread of malaria
3. An infectious agent that is non-living but consist of genetic material surrounded by a protein coat or envelope
7. An organism that causes disease
8. A type of host-organism interaction where one organism benefits while causing no harm to the other
9. Two independent organisms living together to their mutual benefit
11. An infectious agent that can be either rod, sphere or spiral shaped
12. One organism benefits at the expense of the other
14. An example of direct person-to-person spread found on the face