When a Pathogen Spreads from the Original Site to Other

Q21: A relationship in which one organism benefits

Q22: Vectors that transmit pathogens and also serve

Q23: The number of new cases of a

Q24: Which of the following is likely to

Q25: A worldwide epidemic is considered a(n)_ disease.

Q27: A nonliving object such as a tissue,towel,or

Q28: Animals,usually arthropods,that carry pathogens from one host

Q29: The degree or extent of disease-evoking power

Q30: The presence of microbes in or on

Q31: The type of infection in which several