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an obligate relationship which is beneficial to both organisms is called


facultatitve relationship which is beneficial to both organisms is called


a relationship in which only one organism benefits, but neither is harmed is


a relationship in which one organism lives at the expense of another is


a relationship in which neither organism grows as well as it would in isolation is

bacillus thuringiensis

which of the following is not part of the normal body flora


Lactobacillus in the human colon is an exmple of a


Trichonympha and the termite are___ organisms


in the throat, Neisseria meningitidis is a __ organism


Since Neisseria meningitidis and Staphylococcus epidermidis are both normal flora of the throat, they are

they make lysosome

normal microbiota provide protection from infection by all of the following except


Staphylococcus aureus is a __ organism


SIDS is a/an ____ disease

Pseudomonas in burn patients

Which of the following is due to an opportunistic pathogen


the study of disease is


the study of the cause of disease is


The study of the origin and development of a disease is


an inanimate object which may transmit disease is called a

1 meter

The distance over which a droplet may be spread is less than

all the above

Zoonoses may be spread by

lyme disease

Which of the following is a zoonosis

nosocomial infection

Pseudomonas bacteria colonized the bile duct of a patient following his liver transplant surgery. this is an example of a

none of the above

All of the following can contribute to postoperative infections except


One example of a noncommunicable infectious disease is


Change in a body function is a ___ of disease


Objective, observable changes in the body are__


Which of the following is an example of a symptom


A disease which is easily spread from one organism to another is


The fraction of a population with a disease at a specified time measures the disease


Teh total number of existing cases in a population at a time, measured as a percentage of the population, measures the disease


a disease which develops slowly but which lasts a long time is called


a disease which starts in one spot but spreads through the circulatory or lymphatic system is


An epidemiological investigation which seeks to determine probable cause is

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