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1) Which of the following is the correct term for describing the number of Pathogens or amount of toxin required to kill 50% of inoculated populations? a) ID 50 b) TD 50 c) LD50 2) Which of the following terms is used to describe the degree to which an organism is pathogenic? a) Avirulent b) Virulent c) Pathogenic 3) In which of the following diseases symptoms develop slowly; pathologic changes can occur over longer time spans? a) Chronic b) Acute c) Nosocomial 4) Which of the following is the period in which disease is most severe? a) Period of illness b) Prodromal period c) Period of convalescence 5) In which disease causal pathogen goes dormant for extended periods of time with no active replication but then activates and produces symptoms? a) Infectious b) Iatrogenic c) Latent 6) Zoonotic diseases are transmitted from? a) Humans to animals b) Animals to humans c) Birds to humans 7) Which of the following is the first period of disease? a) Prodromal b) Illness c) Incubation 8) How are iatrogenic diseases caused? a) contracted as the result of a medical procedure b) transmitted from animals to humans c) Acquired in hospital settings 9) Which of the following is a sign? a) Chills b) Body temperature c) Dizziness 10) Diseases that are easily and rapidly spread from one host to another? a) Contagious b) Noninfectious c) Noncommunicable 11) Ability of a microbial agent to cause disease is called? a) Pathogenicity b) Acute disease c) Convalesce 12) Symnptoms developing rapidly but lasting a short time is a) Acute disease b) broad spectrum c) Pathogenic

BIOL 20 Chapter 15

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