Medical Parasitology Quiz
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Questions and Answers

The course focuses on the study of ______.

parasitology

Students will learn how to ______ diseases caused by parasites.

diagnose

The course includes practical settings to identify the species of ______.

parasite

Public health specialists address problems based on the socioeconomic status of ______.

<p>communities</p> Signup and view all the answers

Students must report and defend their work during the ______.

<p>finals</p> Signup and view all the answers

The knowledge in immunology is important for understanding how the immune system responds to ______.

<p>parasites</p> Signup and view all the answers

Assignments are randomly assigned to each student, meaning you can't pick your ______.

<p>topic</p> Signup and view all the answers

Quizzes are worth points depending on the ______ of the question.

<p>difficulty</p> Signup and view all the answers

The area of biology concerned with the dependence of one living organism on another is known as ______.

<p>parasitology</p> Signup and view all the answers

Medical parasitology primarily deals with parasites that affect ______.

<p>humans</p> Signup and view all the answers

Tropical medicine addresses special medical problems related to tropical ______.

<p>diseases</p> Signup and view all the answers

Commensalism is a symbiotic relationship where one species benefits without harming or benefiting the ______.

<p>other</p> Signup and view all the answers

The relationship between termites and flagellates is an example of ______.

<p>mutualism</p> Signup and view all the answers

Parasitism is a relationship where one organism, the parasite, depends on the ______ for survival.

<p>host</p> Signup and view all the answers

When two organisms live together and harm one another, it is not classified as ______.

<p>symbiosis</p> Signup and view all the answers

Neglected tropical diseases create favorable conditions for ______.

<p>parasites</p> Signup and view all the answers

The life cycle of the parasite becomes more complicated, the lesser the chances are for the individual parasite to survive, especially in the intermediate ______.

<p>host</p> Signup and view all the answers

Infection can occur through ______, which includes bites from infected insects.

<p>vectors</p> Signup and view all the answers

Contaminated soil and water, along with a lack of sanitary ______, can lead to the spread of infections.

<p>toilets</p> Signup and view all the answers

Consumption of contaminated food can result in ______ transmission of diseases.

<p>oral</p> Signup and view all the answers

Pig is a coprophagous organism that eats the ______ of another animal.

<p>excrement</p> Signup and view all the answers

Porcine cysticercosis can become a ______ inside the person.

<p>tapeworm</p> Signup and view all the answers

Neurocysticercosis in humans is the most common cause of acquired ______ worldwide.

<p>epilepsy</p> Signup and view all the answers

Epidemiology is the study of patterns, distribution, and occurrence of ______.

<p>disease</p> Signup and view all the answers

The term 'prevalence' refers to the number of individuals in a population estimated to be infected with a particular ______.

<p>parasite</p> Signup and view all the answers

Morbidity control involves the avoidance of ______ caused by infections.

<p>illness</p> Signup and view all the answers

To assess the risk of infection, it is necessary to identify potential ______ factors.

<p>causes</p> Signup and view all the answers

The ______ death rate refers to the number of deaths in a population due to a particular disease.

<p>mortality</p> Signup and view all the answers

Endemic diseases report a certain location for ______ intervention programs.

<p>target</p> Signup and view all the answers

One method for reducing health risks is through periodic ______ of individuals or groups.

<p>deworming</p> Signup and view all the answers

Information-education-communication is a health education ______ that encourages healthy life practices.

<p>strategy</p> Signup and view all the answers

Environmental management involves planning and monitoring activities for the modification of ______ factors.

<p>environmental</p> Signup and view all the answers

Environmental sanitation includes interventions to reduce risks from human and animal ______.

<p>excreta</p> Signup and view all the answers

Sanitation is the provision of facilities for safe disposal of human ______.

<p>excreta</p> Signup and view all the answers

Eradication is defined as the permanent reduction to zero of worldwide incidence of infection caused by a specific ______.

<p>agent</p> Signup and view all the answers

Elimination refers to the reduction to zero of the incidence of a specified disease in a defined ______ area.

<p>geographic</p> Signup and view all the answers

Continued ______ or intervention measures are required after elimination to prevent the return of the disease.

<p>surveillance</p> Signup and view all the answers

The ______ host is one in which the parasite attains sexual maturity.

<p>definitive</p> Signup and view all the answers

Humans are considered the ______ host for certain parasites.

<p>definitive</p> Signup and view all the answers

An animal that harbors the asexual or larval stage of a parasite is called an ______ host.

<p>intermediate</p> Signup and view all the answers

In terms of parasite life cycles, a ______ host is where the parasite does not develop further.

<p>paratenic</p> Signup and view all the answers

The ______ host allows the life cycle of the parasite to continue and can be a source of human infection.

<p>reservoir</p> Signup and view all the answers

A ______ vector transmits the parasite only after it has completed its life cycle.

<p>biologic</p> Signup and view all the answers

A ______ vector is responsible for transporting parasites without being infected itself.

<p>mechanical</p> Signup and view all the answers

______ is the establishment of an infective agent in the host.

<p>infection</p> Signup and view all the answers

Flashcards

Parasitology

The study of parasites, including their biology, ecology, and interactions with their hosts.

Medical Parasitologist

A specialist in the diagnosis, treatment, and prevention of parasitic diseases.

Public Health Parasitologist

A specialist in the public health aspects of parasitic diseases, including prevention, control, and surveillance.

Epidemiologist

An individual who studies the spread and impact of parasitic diseases in a population.

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Diagnostic Criteria

A set of criteria used to guide the diagnosis and treatment of parasitic infections.

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Parasite Identification

The process of identifying the specific parasite causing an infection.

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Program Proposal

A written plan outlining strategies to address a public health problem related to parasites.

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Diagnostic Ability

The ability to detect, diagnose, and treat parasitic infections.

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Parasitology community

The study of how living organisms depend on each other.

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Medical Parasitology

Parasitology specifically focused on parasites that impact humans, their medical implications, and their effects on communities.

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Tropical Medicine

A branch of medicine that addresses illnesses prevalent in tropical regions and other related health issues.

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Tropical Disease

An illness native to or frequent in tropical areas that can also occur in non-tropical regions.

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Symbiosis

A symbiotic relationship where two different species live together, providing an advantage or protection to one or both organisms.

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Commensalism

A symbiotic relationship where one species benefits from another without harming or benefiting the other species.

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Mutualism

A symbiotic relationship where both organisms involved benefit from each other.

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Parasitism

A symbiotic relationship where one organism, the parasite, lives in or on another organism, the host, depending on the host for survival and often harming it.

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Infective Parasites

Parasites, such as Plasmodium, that can cause disease in humans.

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Exposure

A situation where a parasite is present in an organism, but doesn't necessarily cause disease.

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Infection

The parasite enters the host's body, usually through a bite from a mosquito or contaminated food/water/soil.

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Transmission

The process by which a parasite completes its life cycle, sometimes involving multiple hosts.

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Life Cycle

The various stages a parasite goes through in its life cycle, often involving an intermediate host before it reaches its final host.

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Definitive Host

The host where a parasite reaches sexual maturity and reproduces.

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Intermediate Host

A host that harbors the asexual or larval stage of a parasite.

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Paratenic Host

A host where the parasite does not develop further but remains alive and can infect another host.

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Reservoir Host

A living organism that harbors a parasite and can serve as a source of infection for humans.

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Incubation Period

The time between initial exposure to an infectious agent and the appearance of symptoms.

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Acute Infection

The initial phase of an infection, often marked by acute symptoms.

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Chronic Infection

An infection that persists over a long period of time, often with less severe symptoms.

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Vector

A living organism that transmits a parasite from one host to another.

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What is epidemiology?

The study of how diseases spread, are distributed, and occur within a population. It helps us understand the patterns and factors influencing disease prevalence.

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What is incidence?

The number of new cases of a disease in a population during a specific time period. It measures how quickly a disease is spreading.

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What is prevalence?

The total number of individuals infected with a specific parasite in a population at a particular time. It reflects the overall disease burden.

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What are risk factors?

Potential factors that can influence the risk of a disease occurring. They may include lifestyle choices, environmental factors, or genetic predispositions.

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What is morbidity control?

Actions taken to prevent illness caused by infections. It involves measures to reduce exposure to parasites and promote individual and community health.

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What is mortality rate?

The death rate related to a specific disease. It measures the severity of the disease and its impact on mortality.

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What is an endemic area?

A location where a specific disease is consistently present or constantly occurring. It indicates a high prevalence of the disease in that area.

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What is disease prevention and control?

The process of preventing a disease outbreak or containing its spread through measures like vaccinations, hygiene practices, and public health interventions.

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What is eradication?

The permanent reduction to zero of the worldwide incidence of infection caused by a specific agent. Once eradication is achieved, continued measures are no longer needed.

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What is elimination?

Reduction to zero of the incidence of a specified disease in a defined geographic area. Continued intervention or surveillance measures are still required.

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What is Information-Education-Communication (IEC)?

A health education strategy that aims to encourage people to adopt and maintain healthy life practices.

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What is Environmental Management?

Planning, organizing, performing, and monitoring activities to modify environmental factors that affect human health. The goal is to prevent or minimize the spread of disease vectors.

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What is Environmental Sanitation?

Interventions to reduce environmental health risks by safely disposing and managing human and animal waste.

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What is Sanitation?

Providing access to adequate facilities for safe disposal of human excreta, usually coupled with access to safe drinking water.

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How can disease be eradicated or eliminated?

This involves a combination of strategies to prevent or eliminate disease, including: periodic deworming programs to reduce parasite populations, information-education-communication to raise awareness about hygiene practices, environmental management to control disease vectors, and environmental sanitation to improve waste disposal.

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What is the key difference between eradication and elimination?

Eradication is the permanent global elimination of a disease, while elimination refers to the elimination of a disease within a specific geographical area. Elimination requires continued interventions and surveillance.

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Study Notes

Introduction to Medical & Public Health Parasitology

  • This course introduces medical and public health parasitology.
  • The instructor is Adrian Lui Dasigo.
  • The course moves from public health to the community.
  • Visual aids of different parasites are shown.

Exam Types

  • SOLUS (prelim): Identification of parasites via microscopy.
  • CONSORTIUS (practical): A partner-based exam that involves describing parasite characteristics and identifying species.
  • Quizzes: Case studies are incorporated. Recitation counts towards quiz scores.
  • SET A (Medical Doctor): Focuses on knowledge of immuno-diagnosis, treatment, and prognosis of diseases.
  • SET B (Public Health Specialist): Focuses on epidemiology proposals, epidemiological research, and realistic problem-solving given socioeconomic factors.
  • Laboratory Exams: Dissection of intestines (pig), identification of parasite parts (male or female). Documentation is crucial here. Applicator sticks, slides, and ziplock bags are used.
  • Finals: Exam includes reporting (defense) on specific parasite types.

What is Parasitology?

  • The study of organisms that rely on another living organism for survival, is called Parasitology.
  • Medical Parasitology studies parasites that affect humans and their significance in communities.
  • Tropical medicine is a branch focused on tropical diseases common in tropical areas (e.g., Philippines).
  • Tropical diseases can also occur sporadically or epidemically in non-tropical regions.
  • Parasites can spread significantly if they affect communities. Factors like climate conditions can create an environment where parasites thrive

Biological Relationships (Symbiosis)

  • Organisms in nature develop unique relationships due to habits and long associations.
  • Symbiosis is when different organisms live together and this might involve a form of protection or benefit to one or both of the organisms.
  • Example: Entamoeba coli in the intestinal lumen (commensalism)
  • Commensalism - a symbiotic relationship where one species benefits from the relationship without harming or benefiting the other.
  • Mutualism - a symbiotic relationship where both species benefit. Example: Termites and flagellates in their digestive systems.
  • Parasitism is a symbiotic relationship where one species benefits and the others is negatively affected. Example: E. histolytica / C. exigua parasites. Parasites obtain resources from the host organism

Parasite Types

  • Endoparasite: Parasites living inside the host.
  • Ectoparasite: Parasites living outside the host.
  • Presence of endoparasites is called infection.
  • Presence of ectoparasites is called infestation.

Parasites' Needs

  • Most parasites are obligate parasites; they need a host to survive.
  • Some parasites are facultative and can survive freely or as parasites.
  • Some parasites are accidental parasites (only for a short period)

Host Types

  • Definitive host: The host in which the parasite reaches sexual maturity.
  • Intermediate host: The host in which part of the parasite's life cycle occurs (asexual or larval stage).
  • Paratenic host: A host that does not cause the parasite to develop further but keeps it alive until transferred to a new host.
  • Reservoir host: A host in which the parasite's life cycle continues to create a source of infection for other hosts.

Life Cycle of Schistosoma japonicum

  • Reservoir host is important in the context of the parasite's life cycle.
  • The parasite's life cycle involves a reservoir host that acts as a source for human infection.
  • Intervention programs, such as vaccination are essential to manage parasite spread.

Vectors

  • Vectors (e.g., insects) are responsible for transmitting parasites from one host to another.
  • Biologic vectors transmit the parasite after its life cycle is complete.
  • Mechanical vectors carry parasites to the host without completing their own life cycle.

Exposure & Infection

  • Exposure is introducing the parasitic agent into a host.
  • Infection is the establishment of the agent in the host.

Sources of Infection

  • Contaminated soil and water are primary sources for parasites to spread.
  • Lack of sanitation (lack of toilets, water sources, and proper waste disposal) and using night soil in farming is a risk factor.
  • Ingestion of contaminated food or water, and from vectors are also risk factors.
  • Fomites (e.g., objects like tools) are important source vectors.

Mode of Transmission

  • Parasites can spread through ingestion of contaminated food/water.
  • Skin contact with infected material or vectors bites can also transmit the parasite.
  • Congenital transmission from mother to child is also possible.
  • Sexual contact can also contribute to transmitting a disease.

Life Cycle

  • Parasite larval stages pass through intermediate hosts.
  • Complicated life cycles decrease the parasite's chance for survival.
  • The number of hosts a parasite has in its life cycle affects the survivability.

Porcine Cysticercosis

  • Tapeworm larvae can develop in the pork if not disposed of and cooked properly.
  • Pork meat sold in public markets can be infected with this parasite.

Human Cysticercosis

  • Neurocysticercosis in humans is a common cause of acquired epilepsy.
  • Cysticercosis infects the muscles, which is called extraneural cysticercosis.

Epidemiologic Measures

  • Epidemiology studies the patterns, distribution and occurrence of disease.
  • Incidence is the number of new cases of infection over a set time.
  • Prevalence is the number of a population infected.

Importance of Case Identification

  • Identifying parasitic disease cases is important for assessing risk factors
  • It can help design specific program interventions to help combat disease and identify endemic regions

Eradication vs Elimination

  • Eradication means completely removing a particular infection from the world. Continued monitoring is no longer needed.
  • Elimination is reducing infection to zero in a targeted area. Continued surveillance is still required.

References

  • Various authors and publications were cited in this course's reference section.

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This quiz tests your understanding of medical parasitology, focusing on disease-causing parasites and their identification. Students will explore the implications of socioeconomic factors on public health and the importance of immunology. Gain insights into symbiotic relationships and the challenges in tropical medicine.

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