Podcast
Questions and Answers
What is the primary way rabies virus is transmitted to humans?
What is the primary way rabies virus is transmitted to humans?
- By the bite of an infected animal (correct)
- Through contaminated water
- By direct contact with infected blood
- Through a mosquito bite
What characterizes the rabies virus genome?
What characterizes the rabies virus genome?
- Double-stranded DNA
- Linear double-stranded RNA
- Single-stranded RNA (correct)
- Circular RNA
What is a required intervention after a potential rabies exposure?
What is a required intervention after a potential rabies exposure?
- Ignore symptoms and monitor for progress
- Immediate isolation for 14 days
- Immediate vaccination of the patient
- Wash the wound and administer post-exposure prophylaxis (correct)
How does rabies virus travel to the brain after infection?
How does rabies virus travel to the brain after infection?
What preventative measure is recommended for at-risk individuals like vets and animal workers?
What preventative measure is recommended for at-risk individuals like vets and animal workers?
What primarily causes the secondary effects of Borrelia dissemination in the host?
What primarily causes the secondary effects of Borrelia dissemination in the host?
Which statement accurately describes Borrelia burgdorferi's interaction with its natural host?
Which statement accurately describes Borrelia burgdorferi's interaction with its natural host?
What characteristic of Borrelia allows it to avoid the immune response in tissue?
What characteristic of Borrelia allows it to avoid the immune response in tissue?
How might Gene Drives be utilized in relation to vector transmitted diseases?
How might Gene Drives be utilized in relation to vector transmitted diseases?
What is a significant challenge in treating Borrelia infections?
What is a significant challenge in treating Borrelia infections?
What is the main reason that rabies may be difficult to eradicate?
What is the main reason that rabies may be difficult to eradicate?
What percentage of dengue cases progress to severe dengue?
What percentage of dengue cases progress to severe dengue?
What viral disease is transmitted by an arthropod vector and has around 390 million infections annually?
What viral disease is transmitted by an arthropod vector and has around 390 million infections annually?
What is the fatality rate for dengue cases?
What is the fatality rate for dengue cases?
Which factor contributes to the pathogenicity of Borrelia burgdorferi in Lyme disease?
Which factor contributes to the pathogenicity of Borrelia burgdorferi in Lyme disease?
How many serotypes of the Dengue virus are known?
How many serotypes of the Dengue virus are known?
What type of organism causes malaria?
What type of organism causes malaria?
In which age group do the majority of malaria deaths occur globally?
In which age group do the majority of malaria deaths occur globally?
What is the primary method of transmission of Borrelia to humans in the Northeast US?
What is the primary method of transmission of Borrelia to humans in the Northeast US?
Which animals are considered primary reservoirs for Borrelia burgdorferi in the Northeast US?
Which animals are considered primary reservoirs for Borrelia burgdorferi in the Northeast US?
What stage of tick life contributes most significantly to the transmission of Lyme disease?
What stage of tick life contributes most significantly to the transmission of Lyme disease?
What is one of the most common early symptoms of Lyme disease?
What is one of the most common early symptoms of Lyme disease?
Which of the following is a virulence factor of Borrelia that helps it in evading the host's immune system?
Which of the following is a virulence factor of Borrelia that helps it in evading the host's immune system?
What treatment is recommended for Lyme disease if diagnosed early?
What treatment is recommended for Lyme disease if diagnosed early?
Which of these statements about Lyme disease is true?
Which of these statements about Lyme disease is true?
Why are deer considered important in the life cycle of ticks transmitting Lyme disease?
Why are deer considered important in the life cycle of ticks transmitting Lyme disease?
Flashcards
Vector-borne disease
Vector-borne disease
A disease transmitted to humans through the bite of an arthropod, like an insect or tick. The vector itself is usually not severely affected by the disease.
Zoonotic disease
Zoonotic disease
A disease that can spread from animals to humans.
Rabies virus
Rabies virus
A virus that attacks the nervous system and can be fatal. Typically transmitted through the saliva of an infected animal.
Passive immunization
Passive immunization
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Rabies vaccine
Rabies vaccine
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Negri bodies
Negri bodies
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Rabies
Rabies
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Dengue fever
Dengue fever
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Dengue Hemorrhagic Fever (DHF)
Dengue Hemorrhagic Fever (DHF)
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Antibody-dependent enhancement (ADE)
Antibody-dependent enhancement (ADE)
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Plasmodium
Plasmodium
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Lyme disease
Lyme disease
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How is Lyme disease mainly transmitted?
How is Lyme disease mainly transmitted?
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What are common symptoms of early Lyme disease?
What are common symptoms of early Lyme disease?
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What animals act as primary reservoirs for Lyme disease?
What animals act as primary reservoirs for Lyme disease?
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Why does the tick's life cycle contribute to the persistence of Lyme disease?
Why does the tick's life cycle contribute to the persistence of Lyme disease?
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How do Lyme disease symptoms evolve over time?
How do Lyme disease symptoms evolve over time?
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How does Lyme bacteria evade the immune system?
How does Lyme bacteria evade the immune system?
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What is the typical treatment for Lyme disease?
What is the typical treatment for Lyme disease?
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Why is Lyme disease considered an emerging disease?
Why is Lyme disease considered an emerging disease?
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Borrelia's mobility
Borrelia's mobility
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Host immune response to Borrelia
Host immune response to Borrelia
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Lyme disease and immune response
Lyme disease and immune response
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Gene Drive
Gene Drive
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Study Notes
Vector-Transmitted Diseases
- Vector-borne diseases are transmitted to humans via the bite of an arthropod vector (like insects or ticks).
- Rabies is a zoonotic disease, meaning it's transmitted from animals to humans, typically through saliva from a bite.
- Rabies virus is an RNA virus (specifically, a (-)ssRNA).
- The rabies virus replicates in nervous tissue, travels to the brain, and then is excreted in saliva.
- Symptoms in humans develop slowly, often over months.
- Post-exposure prophylaxis (PEP) involving human antibodies is crucial.
- Rabies is a significant concern in wild animals.
- Vaccinating domestic animals is a key control measure.
- Oral rabies vaccines in baits can help target wild animals.
- Many parts of the world are rabies-free.
Dengue Fever
- Dengue is an arboviral disease transmitted by mosquitoes (Aedes mosquitoes specifically).
- There are four known serotypes of Dengue virus.
- Dengue fever is characterized by fever and symptoms like eye pain, muscle pain, headache, bone pain, nausea, vomiting, and rash.
- Dengue hemorrhagic fever is a severe form, with additional bleeding, respiratory distress, and a sharp drop in blood pressure.
- High rates of Dengue infections occur in tropical and subtropical regions.
Malaria
- Malaria is a disease caused by the protist Plasmodium.
- Plasmodium is transmitted by mosquitoes, typically Anopheles mosquitoes.
- Malaria causes more than 600,000 deaths annually, mostly in children under 5.
- Infection stages involve both the human and mosquito life cycle.
Lyme Disease
- Lyme disease is caused by the bacterium Borrelia burgdorferi.
- Borrelia is a spirochete (a spiral-shaped bacterium.)
- Transmission is via the bite of infected ticks (Ixodes ticks, specifically).
- The Northeast US has the highest incidence rates.
- Humans are mostly infected by nymph ticks.
- Important reservoir hosts include white-footed field mice and other small mammals.
- Lyme disease is characterized by varying symptoms from early (headache, fever) to later stages (neurological issues, like Bell's palsy, arthritis, carditis).
- Treatment often involves antibiotics.
General Info
- Several vector-borne diseases are significant global health concerns and require constant surveillance and control efforts.
Antibody-Dependent Enhancement
- Antibody-dependent enhancement (ADE) describes a phenomenon where antibodies can actually increase viral replication instead of neutralizing it.
- ADE is a concern for dengue, where antibodies generated to one serotype can increase the risk of infection and a worse outcome by other serotypes.
Gene Drives
- Gene drives are a promising tool to reduce the burden of vector-borne diseases.
- Gene drive technology can selectively target and alter genes in a population, effectively reducing the transmission potential of diseases via specific vectors.
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