The human body contains many microbes, which are mainly found on the skin, mucosal surfaces, and in the large intestine; in fact the human body contains 10 times more bacterial cells than human ones. As well as their own microbiome, humans are continually in contact with other microbes and the vast majority of microbes are not harmful. Most are essential for life. In certain circumstances, normally harmless microbes can become pathogenic.
Correct Answer: The human body has its own population of microbes
The increase in temperature and moisture of the air allows insects to breed more easily and survive winters in northern climates. This leads to larger populations of these insects along with more frequent contact with humans. Although water droplets may be more stable, this is an indirect effect of increased temperature, and is unlikely to have caused more respiratory disease.
Correct Answer: Spread of insect-transmitted disease
The most dangerous contaminant of water is from feces. The pathogens in feces tend to cause digestive disease, so more digestive diseases would be
Correct Answer: More digestive disease
Enterohemorrhagic, contagious, and multi-drug resistant are all disease types that can occur in clinical settings. When they occur there, they are known as “nosocomial”.
Correct Answer: Nosocomial
The majority of infectious diseases (in humans) are caused by viruses.
Correct Answer: Viruses
According to the Center for Disease Control hand washing is the most important defence against the spread of disease in hospitals. Microbes on the skin can easily be transferred from hands to food and other humans without thorough hand washing.
Correct Answer: All of the choices
Pathogens possess virulence factors which allow them to persist in the host, evade host defenses, and cause disease.
Correct Answer: Virulence factors
Inflammation causes all of these symptoms. Non-pathogens do not cause these symptoms, the blush reflex causes redness but not swelling or pain, and these symptoms can occur in the absence of an adaptive immune response.
Correct Answer: Inflammation
Antibiotic resistance is a serious concern worldwide and has been identified as such by the World Health Organization.
Correct Answer: There is increasing resistance to treatments that were once completely effective