DIAGNOSTIC MICROBIOLOGY MOCK EXAM
AND STUDY MATERIAL WITH CLINICAL CASES
AND LABORATORY DIAGNOSTIC PRACTICE
◉ Moist heat.
Answer: a method of microbial control using hot water or steam to
denature proteins and destroy microorganisms. Autoclaving with
steam under pressure is the most effective moist heat sterilization
method.
◉ Pasteurization.
Answer: a moist heat process that reduces microbial numbers in
food and beverages to improve safety and shelf life without complete
sterilization. Milk is commonly pasteurized at specific temperatures
to destroy pathogens like Mycobacterium tuberculosis.
◉ Filtration.
Answer: a physical method of removing microorganisms from
liquids or air by passing them through a filter with microscopic
pores. HEPA filters remove airborne microbes in hospitals and
laboratories.
◉ Environmental Protection Agency (EPA).
,Answer: the United States federal agency responsible for regulating
disinfectants and environmental safety. The EPA approves
disinfectants used on environmental surfaces.
◉ Food and Drug Administration (FDA).
Answer: the United States federal agency responsible for regulating
food, drugs, medical devices, and antiseptics used on living tissue.
The FDA evaluates safety and effectiveness of antiseptic drug
products.
◉ Germ theory.
Answer: the scientific theory stating that microorganisms are the
cause of many diseases. Developed through the work of scientists
such as Louis Pasteur and Robert Koch.
◉ Antisepsis.
Answer: the prevention of infection by inhibiting or destroying
microorganisms on living tissues. Handwashing before surgery is an
example of antisepsis.
◉ Alcohols.
Answer: chemical antiseptics and disinfectants that denature
proteins and disrupt cell membranes. Common examples are ethanol
and isopropanol used in hand sanitizers.
, ◉ Health care antiseptic drug products.
Answer: antiseptic preparations intended for use by healthcare
personnel to reduce microorganisms on skin and mucous
membranes. Examples include surgical scrubs and preoperative skin
preparations.
◉ Over the counter (OTC).
Answer: medications or antiseptic products that can be purchased
without a prescription because they are considered safe when used
as directed. Many hand sanitizers are OTC products.
◉ Aldehydes.
Answer: highly effective disinfectants and sterilants that inactivate
microorganisms by cross-linking proteins and nucleic acids.
Examples include formaldehyde and glutaraldehyde.
◉ Formaldehyde.
Answer: a gaseous or liquid aldehyde used as a high-level
disinfectant and preservative. It is effective against spores but is
irritating and potentially carcinogenic.
◉ Glutaraldehyde.
Answer: a high-level disinfectant used to sterilize heat-sensitive
medical equipment such as endoscopes. It is effective against
bacteria, viruses, fungi, and spores.
AND STUDY MATERIAL WITH CLINICAL CASES
AND LABORATORY DIAGNOSTIC PRACTICE
◉ Moist heat.
Answer: a method of microbial control using hot water or steam to
denature proteins and destroy microorganisms. Autoclaving with
steam under pressure is the most effective moist heat sterilization
method.
◉ Pasteurization.
Answer: a moist heat process that reduces microbial numbers in
food and beverages to improve safety and shelf life without complete
sterilization. Milk is commonly pasteurized at specific temperatures
to destroy pathogens like Mycobacterium tuberculosis.
◉ Filtration.
Answer: a physical method of removing microorganisms from
liquids or air by passing them through a filter with microscopic
pores. HEPA filters remove airborne microbes in hospitals and
laboratories.
◉ Environmental Protection Agency (EPA).
,Answer: the United States federal agency responsible for regulating
disinfectants and environmental safety. The EPA approves
disinfectants used on environmental surfaces.
◉ Food and Drug Administration (FDA).
Answer: the United States federal agency responsible for regulating
food, drugs, medical devices, and antiseptics used on living tissue.
The FDA evaluates safety and effectiveness of antiseptic drug
products.
◉ Germ theory.
Answer: the scientific theory stating that microorganisms are the
cause of many diseases. Developed through the work of scientists
such as Louis Pasteur and Robert Koch.
◉ Antisepsis.
Answer: the prevention of infection by inhibiting or destroying
microorganisms on living tissues. Handwashing before surgery is an
example of antisepsis.
◉ Alcohols.
Answer: chemical antiseptics and disinfectants that denature
proteins and disrupt cell membranes. Common examples are ethanol
and isopropanol used in hand sanitizers.
, ◉ Health care antiseptic drug products.
Answer: antiseptic preparations intended for use by healthcare
personnel to reduce microorganisms on skin and mucous
membranes. Examples include surgical scrubs and preoperative skin
preparations.
◉ Over the counter (OTC).
Answer: medications or antiseptic products that can be purchased
without a prescription because they are considered safe when used
as directed. Many hand sanitizers are OTC products.
◉ Aldehydes.
Answer: highly effective disinfectants and sterilants that inactivate
microorganisms by cross-linking proteins and nucleic acids.
Examples include formaldehyde and glutaraldehyde.
◉ Formaldehyde.
Answer: a gaseous or liquid aldehyde used as a high-level
disinfectant and preservative. It is effective against spores but is
irritating and potentially carcinogenic.
◉ Glutaraldehyde.
Answer: a high-level disinfectant used to sterilize heat-sensitive
medical equipment such as endoscopes. It is effective against
bacteria, viruses, fungi, and spores.
