BIOL 204 – MICROBIOLOGY FOR NURSING PROFESSIONALS
Introduction
Microbiology is a scientific study of microorganisms, bacterial and viral, fungi and parasitic; this
deals with the course and effect, that is, the nature and action of scientifically these
microorganisms. As a branch of biological science, Microbiologists have significant contribution
in healthcare especially diagnosing the causes, transmission, and control of infections and
diseases. In regard to its applicability to the practice of nursing, it cannot be overstated, since
nurses are actively exposed to patients and are frequently responsible for both infection
prevention and diagnosis as well as its management.
Historical Background
It is essential to understand the history of microbiology within the framework of health
care as it is a path filled with centuries of curiosity, alterations, and discoveries. Being one of the
oldest sciences, microbiology is dated from the times when microorganisms could not be seen
with the naked eye. Microbiologists claimed their rights as pioneers much earlier, though; one of
the oldest of them was a Dutch scientist, Antonie van Leeuwenhoek, who lived in the 17th
century. Leeuwenhoek discovered microorganisms through his versatile lens and used
microscopy to become the first person to describe them as animalcules that resided in water,
saliva, and other liquids. His contribution towards the development of such a category of science
as microbiology cannot be overestimated because he contributed toward the discovery of the fact
that there is a world of microorganisms.
The period of microbiology did not quite start gaining its impetus as a scientific
discipline until the nineteenth century. It was the yearning to the French chemist and biologist
Louis Pasteur who contributed immensely to its growth. Through the course of his experiments
on fermentation, Pasteur made a shift in thinking that culminated in the concept known as germ
theory of disease showing that use of microorganisms in the development of diseases as opposed
to the process of spontaneous generation. It was a revolutionary theory that revolutionized the
conceptual ideas of disease and paved way for changed in the approach to medicine and public
health.
Another prominent scientist of the same time as Pasteur was the German medical
practitioner, Robert Koch, who also strengthened the germ theory after coming up with a set of
principles for isolating microbes from diseases. Koch’s discoveries, such as the isolation of the
Tuberculosis bacterium helped to give proof of the concept of Germ Theory and accordingly
helped in forming the fundamentals of medical microbiology.
The history of microbial science has been integrated into nursing as a framework for
medicine; Nightingale studied the idea of cleanliness to prevent patient contamination.
conditions not only in the military hospitals, but also in general, and focused on the connection
between lack of hygiene measures, ill health, and very high mortality rates; as a result,
Nightingale called for increased attention to the cleanliness and thorough restructuring of
military medical facilities. She also endured the introduction of modern nursing, because she was
the first to draw attention to the carcinogens that exist in today’s world of medicine, but more
attention needs to be paid to microbiological security. In this regard, it will be pertinent to assert
that microbiology is fundamentally guided by several cardinal rules that define the fundamentals
of microbial investigation.
Basic Concepts of Microbiology
A microbial principle that is widely accepted and is known as; The microbial folklore
The folklore dictate that there are varied types of microbes in different places for instance soil
water and probably the whole body system. Among the bacteria, viruses and other
microorganisms, there are three common factors that determine the speed of their development,
as well as the internal organization of their cells and the hereditary characteristics – and there are
none of them that could not develop and populate all conceivable and inconceivable
environments.
Another operating law relevant to microbiology is the symbiosis type of relation whereby
microbiological organisms are reliant in other species or systems on which they reside. Some of
them are involved in some biochemical and nutrient cycles and some functions in the ecosystems
including nitrogen determination, decay, and even fermentation. Moreover, it is found that
microorganisms have interaction with plant life and animates besides human being and health of
host as well as balance of microcosm. When one wanted to make some calculations, then the
microorganisms had complicated and multiple relationship with the living organisms as well
with human being.
It is crucial to comprehend the methods and basis for classifying the microorganisms in
order to systematically arrange the various and abundant chemical compositions of microbial
life. According to taxonomic groups, microorganisms are divided into certain categories that
have common features regarding cell structure, metabolic activities and genetical similarities.
The primary levels that guide the microbial classification criterion are the domain divided into
three major domains, which include the Bacteria, the Archaea, the Eukarya.
In the taxonomic scheme, the next level under domain Bacteria is the phylum that groups
microorganisms according to their phenotypic and genetic properties. Some of the widely known
bacterial phyla are Firmicut e s , Proteobacteria , Actinobacteria , and Bacteroidetes that consist
of distinct kind of species having their own metabolic flexibility and functional importance in
ecosystem.
Another type of microorganisms of non-living organisms which still have a very specific
form and means of reproduction is a virus. Viruses contain genetic material (DNA or RNA) and
are surrounded by an outer shell known as the capsid and, by the envelope, which is derived
from the host cell membrane only in some types of viruses. Bacteria reproduce by a mechanism
known as binary fission with the help of a host cell in the case of viruses to make the new viruses
to be produced.
Yeast molds, and mushrooms are the major subgroups of Fungi that are microorganisms.
The composition of all fungal cells is a feature of eukaryotic organisms and evidence by the
presence of membrane-bound organelles like nucleus, mitochondria, and endoplasmic reticulum.
Fungi belong to the large kingdom of organisms known as the realms and they assist in
decomposing organic matter recycling, mutual symbiotic relations with plants, and sometimes
act as parasites.
The other organisms that obtain food and shelter for existence through dependency on a
host organism are known as parasites, and they largely populate the exterior surface of the host
physique of the host organism is unique. They are organisms which are independent or have
low organizations, the ones which feed on other living beings; most diseases are caused by the
parasites which infest human and animals. Like other many parasites, if there is some
understanding of their developmental stages and mode of transmission and the epidemiology and
host parasite interactions; then that could be quite helpful particularly in planning the attempt to
understand and manage parasitic diseases.
Multiplication and reproduction of microbes: Procreation and raising the count are basic
ideas that are associated with the aliveness of microbes and the aids that are used in enhancing
reproduction in these areas. Asexual form of reproduction includes binary fission, budding, and
spores while sexual inclusion conjugation, transformation and transduction. It is also
noteworthy to realize that the growth and the population densities of microbes are regulative
mechanisms out of nutrient, temperature, pH, and oxygen level; therefore, the ability and need to
get microbial species vary.
Microbiology and Infection Control
This specialty is imperative with infection control process given that offers; scientific
evidence on source, characteristics and how infectious agents can be thwarted within healthcare
facilities. The actions and attributes of small creatures activity in the way that explorative
processes are set up to check differences and control advice in motives of health care contests
and instances. Adherence to this knowledge is especially crucial for the nursing personnel who
are often more historically engaged with patients and protective actions against infection.
Among several procedures employed to reduce/eliminate pathogens within clinical
surroundings, sterilization and asepsis are two standard methods. Asepsis focuses on modes of
handling techniques that prevent pathogens from getting access to aseptic areas of the body or
conversely shields articles and items that are in contact with sterile tissues from contaminants
during these procedures. This also entails exercise of sterile practices such as the method of
wearing gowns, wearing of masks, use of antiseptic solutions and the handling of belongings,
eating meals, and washing the hands of the patients. Sterilization, on the other hand, means and
process of eliminating all forms of microbial existences including the spores from the
instruments, operation tables, medical devices as well as other instruments that come into contact
with the patients. There are three broad categories of sterilization namely physical methods that
include autoclaving and radiation and chemical in chemical disinfectants. Because of such
differences between aseptic technique and sterilization, it is vital to recognize what they mean
and how they might reduce the chances of infection in surgeries and any type of invasion or even
treatment of an infected wound.
Transmission, the change of infection from one to the other or from organism to
organism or the act of conveyancing infection potential through a series of activities, sometimes
referred to as stages is termed as the chain of infection. It includes six key components:
Infection in relation to the pathogen is defined by pathogen, or the oppounist host, known as the
reservoir, the route of exit, mode of transmission, the portal of entry and the susceptible host, or
an individual in contact with the pathogen and stands a chance to be infected. In nursing, the
mode of transmission is helpful for purposes of anticipating areas affected in the chain and
comes up with ways that may help to prevent it. For instance, hand washing, wearing gloves,
protective clothing and other measures in dealing with the environment may hinder spread of
disease from one patient to the other.
Health care associated infections refer to infections that a patient develops while
undergoing treatment for another disease or during a healthcare stay. Basically, HAIs can be
considered to be highly undesirable due to direct effects on patients’ conditions, length of stay
and costs. HAIs are divided into five broad categories: including the urinary tract infections,
surgical site infections, pneumonia, central line-associated bloodstream infections, and the
Clostridium difficile associated disease. These infections result from pathogenesis that often
opportunistically arise in conditions pertaining hospital environments and include; Escheria coli,
Staphylococcus aureus, Methycilin-Resistant Staphylococcus aureus, Pseudomonas aeruginosa,
and Enterococcus species. Awareness and appearance of bacteria that are resistant to
antimicrobials also add to HAIs, calling for better administrative practices in infection
prevention and prudent utilization of antimicrobials.
The nurses could be directly involved in implementing the interventions to prevent HAIs
through teaching their patients on ways to avoid getting infected and carrying out assessments
for possibility of infection. For instance hygiene incorporating employments of catheters in
lessens the incidence of UTI while corresponding controls and dressing procedures helps in
decreasing incidences of SSIs. Observing the rate of infection and isolation also helps healthcare
organizations to identify cases and decrease avoidable occurrences of diseases to enable the
reduction of risk impact on patients.
Microbiology and Antibiotic Resistance
Any given antibiotic has a specific range that it can cover; antibiotic resistance is
therefore the ability of bacteria to survive in the presence of a certain antibiotic that would have
normally been lethal to them. This is especially a concern in health systems as this makes it
impossible to treat the affected area since common methods do not work for the individual and in
addition, the infection does not go away and becomes even more prevalent and is easily passed
on to other people. Concerning the current threat to global health, they highlighted that the
emergence and development of antibiotic resistance make many of the existing drugs to be of no
effect when treating bacterial infections. It is, however, necessary to point out that there are
several forms and levels of bacterial resistance to antibiotics, and it is multiple and complex, in
which, for example, the emergence of new mutants can be attributed to it or the incorporation of
resistant genes from other bacteria.
One of the most famous approaches is the biopolymerization of the enzymes that degrade
or modify the antibiotic’s structure that indicates they are not antibiotics and do not have specific
functions. For instance, there are many enzymes refer to as beta-lactamase that has the potential
to break down beta-lactam antibiotics for example penicillin besides cephalosporin. The one is
conductance of alteration of form or dimensions of bacterial cell targets to which the antibiotics
attach and act such as altered penicillin-binding proteins of methicillin-resistant Staphylococcus
aureus that makaccepted the antibiotic unable to bind and produce the desired effect. Bacteria
have also adopted other strategies through which they can neutralize or escape the effects of the
antibiotics these are; Efflux pump systems that expel the antibiotics out of bacterial cells and
alteration of cell membrane lipopolysaccharide content which prevents the antibiotics from
penetrating into the bacterial cell.
Research studies suggest that antibiotic resistance has a very negative impact that ails the
patient and the populous at large. The loads of pathogen production by these resistant bacteria
are seen to be linked to the increased rates of morbidity and mortality, longer and statistically
significantly more prolonged lengths of stay and treatment costs. Individuals with chronic
infections will tend to require a longer, more expensive kind of treatment coupled with the fact
that there may be no cure for the illness to begin with. This is even made worse in patients with
a weakened immune system and such usage will further complicate the situation such as
immunocompromised patients are likely to get severe illnesses. On a broader framework, the
rate of occurrence of antibiotic resistance turns into a factor that restricts the treatment of
infections, can interfere with the surgery and cancer treatments in addition to forcing an
advancement of modern medicine.
The author’s supposition is that it has been cause to suggest that measures to address the
antibiotic resistance are required strategy and that these should be applied within clinical practice
using several approaches. One of these is implementation of antimicrobial stewardship
programmes which are programmes that are designed to ensure that antibiotics should be used
efficiently in a manner that would go a long way in checking the rates of development of the
resistance. These programmes consist of; Antibiotic stewardship which can be described as an
analysis in regards to the prescription of antibiotics, which involves prescription of antibiotics
only when necessary, the right choice of the specific antibiotic required due to its susceptable
test, proper dosage of the antibiotic as well as choosing the right duration of therapy. It also
important to note that there are other ICP and AP control measures that are useful in preventing
or containing spread of resistant bacteria in healthcare facility such as hand hygiene, PPE, and
environmental cleaning.
Tracking the resistance and monitoring trends is useful in early identification of
resistance agents and changes in resistance patterns to cater for in treatment protocols. This
evidence based approach also enables the determination of the empirical therapy based on the
resistance patterns within a certain locality and also facilitates the use of strategies to prevent
infections. Consumer awareness campaigns on rational use of antibiotics and the risks associated
with the over exploitation of antibiotics are also needed to discourage the unnecessary demand of
medical scripts for antibiotics.
The new antibiotics, other treatments and diagnostics tools must be developed to control
the disease producing microbes which have become resistant. The search and development of
new and better antimicrobial agents, bacteriophages and immunotherapy make human a better
prospect in future. Furthermore, enhancement on technologies used in diagnosing resistant
infections in patients is helpful in that resistant infection are diagnosed early and an efficient
treatment approach is adopted in the management of patient care.
Microbiology and Immunology
Immunology is a branch of biomedical science that focuses on the analysis of immunity,
immunogenicity, function of the immune system, ways and means through which the immune
system holds itself. It is the body’s shield against elements that are foreign like pathogens
(bacteria, viruses, fungi, and parasites) and potentially harming substances. It is a delicate
balance of the different cells and proteins, and among the cells these are white blood cells
specifically Lymphocytes, macrophages and dendritic cells and among these proteins are
Antibodies, cytokines, and the complement system. The immune response is typically divided
into two main categories: known as the immediate, but generic, defense as compared to the
adaptive immunity, provides long-standing and targeted protection due to pathogen recognition
and recall.
Microbiology is a vital subject that aids in the study of infections owing to the fact that it
outlines modes of conduct of diseases and their responses to their hosts. Scientifically, the use of
microorganisms in the diagnosis of diseases provides insights into the etiological actor, the
manner in which the pathogen disseminates and the relevant pathogenicity. The assessment of
these approaches contributes to the identification of prospective diagnostic signs, therapeutic
strategies, or prophylactic measures. For instance, the knowledge of what defines an antigen on
the outermost surface of the pathogen has been essential to create drugs that have affinity
towards it or vaccines that can create an immune response towards it.
Vaccines could be described as one of the most effective strategies and means in
contemporary fight against diseases and protection of population’s health. They operate
selectively through the activation of the immune response in order to ward off the invader
without the onset of the disease. Vaccines contain components of the pathogen also referred to as
antigens, which may be attenuated/live organisms, killed organisms/subunits or mRNA that
produces the antigen and stimulates the adaptive immunity. The body forms antibodies and
memory T-cells upon vaccination that help in the identification of invading germs, allowing for a
fast and efficient launch of a defense mechanism if the person comes into contact with the actual
pathogen in the future. Vaccination began with the aim of combating small pox and has gone on
to prevent many other diseases including polio measles, and influenza among others and has
greatly reduced mortality and morbidity globally.
Herd immunity is also called community immunity and it is a situation that can arise due
to immunity developed by a high proportion of the population against an infectious disease
through the use of a vaccine or from previous exposure. Immunisation on its part helps safeguard
those individuals who are unable to be immunised because of some underlying conditions or a
low immunity level with the goal of reducing the spread of the disease in the community.
Operational understanding of the idea of the threshold effect is crucial for nursing practice since
nurses are often involved in vaccination, education, and promotion of immunization-related
legislation.
Because vaccines are administered and monitored within nursing practice, nurses
frequently participate in giving vaccines, timeously noting possible side effects, and educating
patients and their families regarding the advantages and disadvantages of vaccination. They also
ensure communities are sensitized on issues concerning vaccination and consequent herd
immunity. During an epidemic or a pandemic, this cadre is typically on the front lines at
administering infectious disease control measures, contact tracing, and public health campaigns.
Microbiology in Clinical Diagnosis
Microbiology is an essential component of the clinical diagnostic process as it is the entity
responsible for offering diagnosis means and methods when an infectious agent is suspected to
be the source of disease. Right diagnosis is critical in meeting patient needs and providing
treatment since is directs treatment, controls transmission of diseases, and reduces the
unnecessary administration of antibiotics that cause resistance.
Common Microbiological Tests Used in Clinical Practice
i. Cultures: Of all the given groups, it will be potentially fitting to state that the culture
technique falls under the category of microbiological methods – the most conventional
and still widely used in the modern practice. This allows the increase in bacterial or
other microbial isolates derived from clinical specimens including blood, urine, sputa,
tissue etc on nutrient complex media. In isolation its diagnostic characteristics of the
specific cause of the diseases embraces the growth rate of the bacteria or virus among the
other light and electron microscopic tests carried on the specimen as well as the
biochemical tests applied on the specimen when it is cultured on a single media.
Escherichia coli is favorable to culture because of cells, and just about all aberrational
bacterial and asymptomatic I would presume fungous infections can be identified with
cultures. For instance, bloodstream bacterial infection that can be cultivated from blood,
respiratory that may include Streptococcus pneumoniae or Mycobacterium tuberculosis
cultivated from sputum.
ii. Serological Assays: Serology is a typical type of diagnosis that focuses on testing for
presence of specific antibodies or antigens in blood sample of the targeted infections.
This test is especially of value in those cases where definite organisms may not be easily
culturable from the clinical specimens or are no more present in the specimen. Some of
the common techniques that are used include serological testing, the enzyme
immunoassay, the dipstick serological testing and other rapid tests which are especially
used in identification of a virus such as the HIV, the Hepatitis B, Epstein Barr virus and
sometimes even cancer. Some common examples of a latex device include the use of
viral antigens which are coated on the latex and identified in the blood test by antibodies
that search for the said viral antigens and they are valuable in screening the patients that
may have been earlier sensitized or infected by certain viruses.
iii. Molecular Diagnostics: For example, the PCR tests which are known to be molecular
techniques have greatly boosted the diagnosis of infectious diseases. PCR enables mere
targeting and cloning of particular genetic sequences from the pathogens; that can
identify bacteria, viruses, fungi as well as parasites with high precision and within a short
span of time. Molecular diagnostics are accurate techniques since they are sensitive and
specific, and therefore can be used to identify organisms that are difficult to culture or
those which are present in low abundance. For instance, PCR is mostly applied in
diagnosing viral diseases including COVID 19, influenza and human papillomavirus
( HPV).
Importance of Accurate and Timely Diagnosis in Patient Care
Accurate and timely diagnosis of infectious diseases is critical for several reasons: That is why
the diagnosis of infectious diseases is so indispensable for many reasons:
i. Targeted Treatment: Localization of the infection and the identification of the
pathogens involved can then enable one to be in a better position to give out the correct
antimicrobial therapy. This target approach also raises the number of days that those
having LLPs are not sick, will be inclined to avoid other detrimental effects, to be useful
in enhancing the quality of services do with pap. This is also achieved in avoiding the
prescription of antibiotics with a broader spectrum for infections, with additional adverse
effects and development of resistance as well.
ii. Infection Control: Measures to simplify and apply to the evaluation and infection
control typically rely on speed in identifying the pathogens that cause the infections. For
instance, if a specific patient is diagnosed with TB or any other contagious virus
including Ebola, it is essential to know that such patients should not be exposed to
ordinary patients, and the healthcare professionals serving in the health facility must also
wear protective gear to avoid contracting the virus or spreading it to fellow medical
practitioners. This also provides a platform to check on the root cause of different
infections and reduce their spread by health professionalists.
iii. Public Health Surveillance: Diagnostic microbiology on the other hand is very vital in
generation of disease surveillance data on the occurrence and prevalence of different
infectious diseases in a given communities or cross section of the population. This
information is very vital in defining the enormous development, the initial detection of
the possible epidemic, and the necessary planned public health intervention. For
instance, during the current COVID-19 pandemic globally, diagnostic testing is relevant
in assessing the multiple cases of the virus’s spread and in the development of policies, as
well as countervailing measures.
iv. Patient Management and Prognosis: Glioma staging at an early and an accurate stage
can help healthcare providers in the management of the patients because it helps a lot in
the decisions making of the suitable treatment options, the supportive care, and follow-up
care. For serious or fatal conditions like sepsis or meningitis, it is vital for these
infections to be diagnosed early so that proper treatment mechanisms can be instigated to
help the patient.
Microbiology Education for Nursing Professionals
Considering the current state of assessment of microbiology education in nursing
programs, NursCAD can assert that the substance of knowledge within most programs needs
further development but has better prospects for sustainable enhancement than it might seem at
first sight. As expected, microbiology is included in the first few courses offered in nursing
schools; however, the knowledge is essential for comprehending the basic mechanism of
diseases and infections, as well as the primary role of microbes. Still, it is clear that the course
and program may in some areas at least cover a wider range of topics and in others, a deeper
level of detail. It is also may be still possible that some programs may contain full courses with
the lab activity as a part of the given course; others may contain only several of those
components placed in the different science or nursing courses. The literature highlighted here
makes it clear that the education in microbiology remains inconsistent, which corroborates the
need for the enhancement or formalization of the specific education of nursing pupils so that all
of them will be prepared with knowledge and skills that they need in dealing with microbial
aspects of health problems of their patients.
Strategies for Integrating Microbiology Content into Nursing Curricula
Microbiology knowledge is one of the important fields that the nursing students must
cover; therefore, the knowledge must be delivered in a proper manner meaning that the proper
approaches should be taken on how the lesson will be delivered and how the knowledge will be
applied. Microbiology courses can be greatly improved by providing the students with specific
practical skills in identification of microorganisms, cultures, staining techniques, and diagnostic
methods and this can be done by offering focused microbiology courses. These courses should
include the following critical aspects of Microbiology: Microbial physiology, diseases causation,
antibiotics, and measures to combat infections. Incorporation of microbiology material into the
clinical nursing courses will help enhance the content and enable students to remember what has
been taught better. For example, if a professor takes his students through the clinical rotations,
then he might use contagious diseases and then relate these with microbiology. Understanding
current norms to absorb the particular essences of those individuals who developed this
curriculum may be nurtured to coach microbiologists and prospectors for infection control.
Importance of Continuing Education in Microbiology for Practicing Nurses
Microbiology is one of the active skills practiced among the nurses; there are the new
microbial threats hence education to make the nurse knowledgeable on new data infections and
control measures. In this respect of practice in infectious diseases, one realizes that it is still
quite dynamic that is why it is not surprising to come across new/invented infectious agents,
appearance of new diagnostic methods that can identify such agents, as well as the changes in
antibiotic resistance patterns. Continuing in professional practice reflects the professional nurse
in applying knowledge and skills to patient care including nursing needs, strategies for managing
insecurity upon exposure to infections and the ability to be part an interdisciplinary team. It is
thus feasible to progress in knowledge through workshops or online and web-based twig or
seminar, certified courses like infection control and microbiology most of all. In more detail,
these opportunities also promote the places of improving Clinical Practice philosophy along with
personal and great ambassadors for profession promotion and each nurses’ development within
the field of nursing profession.
Conclusion
Education on microbiology is key in nursing education due to the numerous roles it plays
in nursing practice through helping the health professionals to prevent diseases and infections
leading to better patient outcomes and population health. Therefore, it is crucial to advance the
knowledge on integration of microbiology in nursing and ensure that nurses are prepared to
manage the risks posed by infectious diseases and antibiotic resistance. It is fundamental to
uphold competence amongst the nurses concerning the handling of the microbes and, in the same
regards, ensuring that the nurses update themselves with current practices that are being
implemented in the noble course.
The continued patronage in research work education pragmatic knowledge and practice
enhancement remain obligatory for enhancing microbiology in nursing practice. As the
generation of new pathogens and development of resistance of the known ones is a reality, so
knowledge and methods needs to be upgraded and new effective strategies should be found. In
promoting the development of continuing education and interprofessionalism, these nursing
professionals can also play an active and vital role toward the prevention of infectious diseases,
which in turn will enhance the quality of care.
References
Hence, the following references are written in APA format as a reference norm. Please, do
not forget to change the font and citation style to the one more suitable for your paper (APA/
MLA / Chicago/ etc).
1. Centers for Disease Control and Prevention. (2020). Antibiotic resistance threats in the
United States, 2019. Retrieved from https://www. cdc. gov/drugresistance/pdf/threats-
report/2019-ar-threats-report-508. pdf
2. Fleming, A. (1929). On the antibacterial action of cultures of a penicillium, with special
reference to their use in the isolation of B. influenzae. British Journal of Experimental
Pathology, 10(3), 226-236.
3. Koch, R. (1882). The etiology of tuberculosis. Berlin: Springer.
4. Nightingale, F. (1859). Notes on nursing: What it is, and what it is not. London: Harrison.
