MDMICRO-LE4

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What are prions?

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Infectious proteins that do not contain DNA or RNA.

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Prion Characteristics

What are prions?

Infectious proteins that do not contain DNA or RNA.

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Dengue Virus Transmission

What is the primary mode of transmission for SARS-CoV-2?

Respiratory droplets (sneeze, cough, speak, sing or breathe).

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Japanese Encephalitis Virus Characteristics

What is the size of the Japanese Encephalitis Virus?

40-50 nm in diameter.

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Influenza Virus Characteristics

What are the types of Influenza viruses and their respective characteristics?

Influenza A causes seasonal epidemics and pandemics, infects humans and some animals. Influenza B causes seasonal epidemics and generally infects humans. Influenza C causes mild illness and infects only humans. Influenza D primarily affects cattle and is not known to infect humans.

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Japanese Encephalitis Virus Vaccine

How is the JE vaccine administered?

Given in a two-dose series (given 28 days apart), given in adults and children, a booster dose should be given (third dose) if a person has received a two-dose primary vaccination or if there is a risk for re-exposure.

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Dengue Virus Diagnosis

How is HIV diagnosed?

Through detection of anti-HIV antibodies and HIV load using tests like ELISA, immunoblot, indirect immunofluorescence, and RT-qPCR.

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Polio Virus Characteristics

What is the diameter of the Polio virus virion?

27-30 nm.

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Rabies Virus Characteristics

What is the composition of the Rabies virus?

It includes envelope, glycoprotein spikes, protein core, and nucleic acid.

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Prion Diseases

What is the characteristic feature of prion diseases in the brain?

Aggregation of fibrils in the brain affecting brain functions.

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Dengue Virus Treatment

What is the purpose of anti-retroviral drugs?

To fight and slow down the HIV infection.

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Dengue Virus Treatment

What is the role of protease inhibitors in HIV treatment?

They bind to the enzyme protease and inhibit its action, which is needed by HIV to replicate.

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Polio Virus Clinical Manifestations

What are the symptoms of paralytic poliomyelitis?

Loss of superficial and tendon reflexes, severe muscle aches, spasms of the back and lower limbs, flaccid paralysis.

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Rabies Virus Treatment

What is the recommended treatment to prevent the Rabies virus from infecting a person after a bite incident?

Rabies Immune Globulin (RIG) - a fast-acting shot given near the site of the bite, followed by a series of injections within 14 days.

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Rabies Virus Characteristics

What family does the Rabies virus belong to?

Rhabdoviridae family.

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Dengue Virus Characteristics

What type of RNA does the Dengue Virus have?

ssRNA, (+) strand.

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Polio Virus Characteristics

How many types of Polio virus are there?

Three types: P1, P2, P3, with type 1 being the most common form causing paralytic illness.

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Dengue Virus Treatment

Name two types of protease inhibitors used in HIV treatment.

Atazanavir & Cobicistat, Lopinavir & Ritonavir, Darunavir & Cobicistat.

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Dengue Virus Prevention

What are some methods of HIV prevention?

Proper education and awareness, barrier protection, safe injection practices, avoiding exposure to relevant body fluids, using protective gear, and having regular check-ups if pregnant.

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Prion Diseases

What are the human prion diseases?

Creutzfeldt-Jakob Disease (CJD), Variant Creutzfeldt-Jakob disease, Gerstmann-Straussler-Scheinker Syndrome, Fatal Familial Insomnia, and Kuru.

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Polio Virus Clinical Manifestations

What is the incubation period for non-paralytic poliomyelitis?

3-6 days.

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Dengue Virus Treatment

Name three types of nucleoside and nucleotide reverse transcriptase inhibitors (NRTIs) used in HIV treatment.

Abacavir, Lamivudine & Zidovudine, Emtricitabine, Tenofovir disoproxil.

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Polio Virus Vaccine

What is the recommended vaccine for Polio virus?

Inactivated Polio Vaccine (IPV) and Oral Polio Vaccine (OPV).

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Dengue Virus Characteristics

How many virus-encoded membrane-associated proteins do DENV virions contain?

2 (E&M proteins).

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Dengue Virus Prevention

What are the recommended preventive measures for COVID-19?

Cover mouth when coughing/sneezing, frequent hand washing, vaccination, follow minimum health standards, mass testing and contract tracing.

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Prion Diseases

What are the diseases caused by prions?

Transmissible spongiform encephalopathies (TSEs) including Scrapie disease in sheep, Bovine spongiform encephalopathy, Chronic wasting disease in deer and elk, Kuru in a tribe in Papua Guinea, and Creutzfeldt-Jakob Disease.

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Rabies Virus Clinical Manifestations

What is the incubation period for Rabies virus?

Approximately 30-90 days, with a range of 5 days to 2 years.

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Rabies Virus Prevention

What are the key methods for preventing Rabies infection?

Vaccinating pets regularly, keeping pets indoors, protecting pets from stray animals, and reporting stray animals to proper authorities.

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Prion Treatment

Is there a specific treatment for prion diseases?

No, there is no specific treatment, only supportive care.

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Japanese Encephalitis Virus Characteristics

What is the main cause of encephalitis in Asia?

Japanese Encephalitis (JE) virus.

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Influenza Virus Clinical Manifestations

What are the clinical manifestations of uncomplicated & seasonal influenza?

Acute respiratory infection with symptoms such as chills, headache, dry cough, high fever, muscle aches, malaise, and anorexia.

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Dengue Virus Transmission

How is HIV transmitted?

Through sexual contact, blood transfusion, blood products or contaminated needles, and vertical transmission (mother to child).

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Dengue Virus Clinical Manifestations

What is the incubation period of HIV?

2-4 weeks.

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Polio Virus Characteristics

What family does the Polio virus belong to?

Picornaviridae.

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Polio Virus Transmission

What is the route of transmission for the Polio virus?

Fecal-oral route and oral-oral route (mouth-fingers-mouth).

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Polio Virus Diagnosis

How is the Polio virus diagnosed?

Viral isolation through stool, pharynx, cerebrospinal fluid (CSF), or blood; PCR; Serology.

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Dengue Virus Characteristics

What is the diameter of the Dengue Virus (DENV) virions?

50 nm.

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Dengue Virus Characteristics

What are the four serotypes of the Dengue Virus?

DENV 1, 2, 3, 4.

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Rabies Virus Prevention

What is the purpose of passive immunization against Rabies virus?

To provide the immediate availability of neutralizing antibodies at the site of the exposure.

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Dengue Virus Clinical Manifestations

What are the signs and symptoms of SARS-CoV-2 infection?

Fever, chills, cough, dyspnea, muscle/body ache, headache, fatigue, loss of taste/smell, sore throat, runny nose, nausea/vomiting.

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Dengue Virus Characteristics

What does HIV stand for?

Human Immunodeficiency Virus.

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Dengue Virus Pathogenesis

How does HIV weaken the immune system?

It creates a deficiency of the CD4+ cells of the immune system.

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Japanese Encephalitis Virus Prevention

What are the preventive measures for Japanese Encephalitis Virus?

Use mosquito repellant, wear protective clothing, regularly remove stagnant water at home, use a bed net, secure windows and doors at home.

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COVID-19 Virus Pathogenesis

What happens when antibodies bind to the COVID-19 virus?

They stop it from replicating.

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Dengue Virus Treatment

What is the function of integrase inhibitors in HIV treatment?

They block the enzyme integrase to infect the T-cells and are often the first line of treatment.

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Dengue Virus Pathogenesis

How does the Dengue Virus enter the host cell?

It fuses with the cell and enters through viral receptors.

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Dengue Virus Characteristics

What is the genus of the Human Immunodeficiency Virus (HIV)?

Lentivirus.

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Influenza Virus Characteristics

What are the characteristics of the Influenza virus?

Single-stranded, helically shaped, RNA virus of the Orthomyxovirus family, with spherical or filamentous enveloped particles, 80 to 120 nm in diameter, and a helically symmetric nucleocapsid consisting of a nucleoprotein and a multipartite genome of single-stranded antisense RNA in seven or eight segments.

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Japanese Encephalitis Virus Pathogenesis

What is the pathogenesis of Japanese Encephalitis Virus in humans?

Infected mosquito bite, goes into the person’s blood viremia/enters the person’s macrophages, enter the blood brain barrier, affects the brain (may also affect basal ganglia, thalamus, midbrain & pons).

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Influenza Virus Treatment

What is the recommended treatment for Influenza virus?

Antiviral medicine, best to take within 48 hours after symptoms begin. Antibiotics will not help since a virus causes the flu.

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Rabies Virus Transmission

How is the Rabies virus transmitted to humans?

Through infected animal bites (dogs, cats, bats) or licking an open wound by an infected animal.

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Prion Characteristics

How does the transformation of normal PrPc to PrPsc occur?

It can occur sporadically, through genetic mutation in the Prp gene, or by induction from nearby abnormal prions, resulting in a chain reaction.

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Dengue Virus Characteristics

What is the suggested ecological origin of SARS-CoV-2?

Bat populations.

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Dengue Virus Pathogenesis

What is the role of Gp120 in HIV?

It is essential for virus entry into the cells and plays a vital role in attachment to specific cell receptors.

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Influenza Virus Transmission

What is the temporal pattern of Influenza virus transmission?

October to April in the northern hemisphere, April to September in the southern hemisphere, and year-round in tropical climates.

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Japanese Encephalitis Virus Treatment

What is the recommended treatment for Japanese Encephalitis Virus infection?

Paracetamol, increase fluid intake, bed rest, eat nutritious food.

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Influenza Virus Prevention

What are the preventive measures for Influenza virus?

Getting vaccinated, practicing proper hygiene, and adopting good health habits.

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Rabies Virus Prevention

What is the purpose of active immunization against Rabies virus?

To include antibody and T-cell production in order to neutralize the virus in the body.

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Dengue Virus Characteristics

Where was the SARS-CoV-2 virus first reported?

Wuhan, China in December 2019.

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Prion Characteristics

What are the characteristics of the abnormal folding in the protein caused by prions?

The PrPsc form is heat-resistant, protease resistant, insoluble, and forms aggregates in neural cells, leading to destruction of neural tissues and neurological symptoms.

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Dengue Virus Diagnosis

What is the gold standard for confirming Dengue infection?

Polymerase Chain Reaction (PCR).

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Dengue Virus Treatment

What is the recommended treatment for Dengue?

Supportive treatment including paracetamol, increased fluid intake, and bed rest.

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Dengue Virus Characteristics

What is the global impact of HIV?

It is known to be a global concern.

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Japanese Encephalitis Virus Clinical Manifestation...

What are the clinical manifestations of Japanese Encephalitis Virus infection?

May be asymptomatic to life threatening, high grade fever, headache, neck stiffness, nausea & vomiting, disorientation, coma, seizures, spastic paralysis, death.

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Dengue Virus Characteristics

What is the main component of the HIV capsid?

P24.

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Dengue Virus Treatment

What is the main treatment for HIV?

Chemotherapy.

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Prion Characteristics

What is the probable function of glycosylphosphatidylinositol-Anchored lipid on neuron plasma membrane lipid rafts?

Cell signaling, homeostatic regulation, influencing synaptic function, and protecting neurons against cell damage.

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Dengue Virus Diagnosis

What is the primary method for diagnosing COVID-19?

RT-PCR through nasopharyngeal swab, oropharyngeal swab, or saliva.

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Japanese Encephalitis Virus Transmission

How is Japanese Encephalitis (JE) virus transmitted?

Through a mosquito bite (vector: Culex sp.).

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Japanese Encephalitis Virus Transmission

What is the amplification cycle of Japanese Encephalitis Virus during summer time?

Culex bites infected pig or commonly birds, viremia in mosquito, goes to the brain, neuron, salivary gland, bite another pig and/or birds, bite humans (dead end host).

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Japanese Encephalitis Virus Diagnosis

How is Japanese Encephalitis Virus diagnosed?

JEV-specific IgM antibody present in the CSF or serum via IgM-capture ELISA, MRI for brain lesions.

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Dengue Virus Clinical Manifestations

What are the signs and symptoms of acute HIV infection?

Fever, chills, muscle aches, sore throat, fatigue, swollen lymph nodes, and mouth ulcers.

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Dengue Virus Characteristics

What is the family of the SARS-CoV-2 virus?

Coronaviridae family.

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Dengue Virus Clinical Manifestations

What are the three phases of Dengue Virus infection?

Febrile, Critical, Recovery.

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Japanese Encephalitis Virus Transmission

How do mosquitoes get infected with Japanese Encephalitis Virus?

By biting infected pigs (sometimes birds).

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Dengue Virus Vaccine

What are the types of vaccines available for SARS-CoV-2?

mRNA vaccine, viral vector vaccine, subunit vaccine.

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Dengue Virus Pathogenesis

What is the main effect of HIV on the human body?

It weakens the immune system and causes AIDS.

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Influenza Virus Transmission

How is the Influenza virus transmitted?

Person to person via large droplets, aerosol transmission of small droplets, exposure to fomites.

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Dengue Virus Pathogenesis

What is the function of the viral envelope in HIV?

It is the envelope through which the virus binds.

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Dengue Virus Clinical Manifestations

What are the stages of HIV infection?

Stage 1: Acute HIV infection, Stage 2: Chronic HIV infection, Stage 3: Acquired Immunodeficiency Syndrome (AIDS).

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Dengue Virus Diagnosis

What is the purpose of RT-qPCR in HIV diagnosis?

To monitor the progression of an HIV infection and the effectiveness of chemotherapy by detecting the increase or decrease of the viral load.

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Influenza Virus Clinical Manifestations

What is Reye’s Syndrome and its association with Influenza virus?

An acute encephalopathy of children and adolescents, with swelling in the liver and brain. It is a recognized rare complication of Influenza B, Influenza A, and herpesvirus varicella-zoster infections.

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Dengue Virus Clinical Manifestations

What are the opportunistic infections that occur in the most severe phase of HIV infection?

Pneumocystis pneumonia, esophageal candidiasis, Kaposi’s sarcoma, lymphoma, toxoplasmosis, herpes simplex, cryptococcosis, cryptosporidiosis, tuberculosis, and recurrent bacterial pneumonia.

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