Across
- 3. a type of drug that kills bacteria
- 5. a disease caused by bacteria
- 9. a disease caused by a virus and spread by sexual contact
- 10. a type of drug that relives symptoms
- 11. a stage of drug testing that does not involve humans
- 12. something that looks like a drug but contains no drug
- 13. contains dead or weakened version of a pathogen
Down
- 1. a type of pathogen that is prokaryotic
- 2. a type of disease that can be spread from person to person
- 4. the microorganism that is the origin of penicllin
- 5. a first barrier of defence that prevents entry of pathogens
- 6. a disease caused by a protist pathogen
- 7. is present in the stomach to kill bacteria
- 8. the surname of the scientist that discovered penicillin
- 10. a microorganism that can cause disease