FLAVIVIRIDAE, RHABDOVIRIDAE, TOGAVIRIDAE Flashcards
Break-bone fever
Dengue Fever Virus
● Enveloped and icosahedral with a single stranded ,positive sense RNA genome
ZIKA VIRUS
ZIKA VIRUS
● First Isolated from (?) in the Zika Forest of Uganda
Rhesus Macaque
● Positive sense single stranded RNA virus
WEST NILE VIRUS
● This can cause Encephalitis
WEST NILE VIRUS
WEST NILE VIRUS
● First discovered in the ―West Nile ― province of Uganda in
1937
● A single-stranded
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
● RNA virus, enveloped
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
● Bites of infected mosquito
Yellow Fever Virus
Yellow Fever Virus 3 Types of transmission cycle
● Sylvatic (or jungle) yellow fever
● Intermediate yellow fever
● Urban yellow fever
Bite of an infected Aedes species (Ae. aegypti or Ae. albopictus) mosquito
Dengue Fever ViruS
Mosquito ( Aedes aegypti and Aedes albopictus)
Dengue Fever Viru
ZIKA VIRUS
● Vertical Transmission
ZIKA VIRUS
● Blood Transfusion
ZIKA VIRUS
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
MOT
● Birds
● Mosquito
WEST NILE VIRUS
Bite of infected Culex species mosquitoes; Vector Mosquito
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
Nucleic acid amplification test
Dengue Fever Viru
Serologic tests
Dengue Fever Viru
WEST NILE VIRUS
RT-PCR
ZIKA VIRUS
Enzyme-linked immunosorbent assay (ELISA) test
DF
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
HEP C
Polymerase chain reaction (PCR)
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
Vaccine
Flavi
Arbo
Yellow Fever Virus
Use insect repellent
Dengue Fever Virus
ZIKA VIRUS
● Wear loose-fitting long sleeved shirts and long pants
Dengue Fever Viru
● Control mosquitoes inside and outside your home
Dengue Fever Viru
Vector control
ZIKA VIRUS
● Avoid unprotected sex
ZIKA VIRUS
● Use insect repellent
Dengue Fever Virus
ZIKA VIRUS
No vaccine (SLE)
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
Inactivated Vero cell culture
derived Japanese encephalitis vaccine manufactured by IXIARO (Japanese Encephalitis)
Inactivated Vero cell culture
only JE vaccine licensed and available in the United States
Inactivated Vero cell culture
Inactivated Vero cell culture
● it was approved in March 2009 for use in people aged
17 years and older
Inactivated Vero cell culture
● May 2013 : it was approved for use in children (?)
2 months through 16 years of age
● Fever headache, Muscle aches, Nausea, Red eyes, face, tongue, Yellow skin and eyes.
Yellow Fever Virus
● Fever, severe headache, nausea, pain behind the eyes muscle and joint pains.
Dengue Fever Viru
● Incubation: 4–10 days after infection; last for 2–7 days
Dengue Fever Virus
Asymptomatic
ZIKA VIRUS
● Incubation: 2-14 day
ZIKA VIRUS
WEST NILE VIRUS
● Symptoms occur in 20%-40% of infected people
WEST NILE VIRUS
● Incubation: 2-14 day
ZIKA VIRUS
WEST NILE VIRUS
● blood-brain barrier: lymphocytic meningitis
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
● fever, headache, nausea, vomiting, diarrhea, and myalgias
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
● altered mental status, agitation, confusion, and coma.
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
● Incubation: 5 to 15 days
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
● Blood transfusion, intravenous drug abuse, hemodialysis, sexual contact with infected partners, acupuncture, tattooing, and sharing of razors
Screening Antibody Test HCV
anti-HCV EIA, and RTPCR
is used to quantify virus in the blood to monitor antiviral therapy.
RT-PCR and quantitative bDNA (branched chain DNA)
used to detect acute hepatitis C infection
ELISA
used to determine chronic hepatitis C disease
PCR
are used to differentiate patients who are likely to respond to therapy from those with lower response rates.
Highly Sensitive Molecular Biopsy
is used to identify genotypes more or less likely to respond to therapy
HCV Genotyping
Enveloped virus with a single-stranded RNA genome
Vesicular Stomatitis Virus
● Bullet shaped or Rod shaped
Vesicular Stomatitis Virus
● Size: 180 x 75 nm
Vesicular Stomatitis Virus
● Vector: Insect (Mosquito, Sand fly, Black fly)
Vesicular Stomatitis Virus
● Host: Cattle, Horse, Pig, Deer, Human
Vesicular Stomatitis Virus
● Bite by rabid dog or other animals
Rabies Virus
● Virus ,multiply in the muscle connective tissue, nerves after 48-72 hours
Rabies Virus
● If untreated % will developed rabies
50
● Virus are carried in saliva virus deposited in the wound site
Rabies Virus
● Animals: Insect bite
Vesicular Stomatitis Virus
● Humans: Exposure to infected animal
Vesicular Stomatitis Virus
● Direct immunofluorescence and Confirmation in the animal
Rabies Virus
● PCR
JAPANESE AND ST. LOUIS ENCEPHALITIS VIRUS
Hep C Virus
Vesicular Stomatitis Virus
● Rigorous cleansing of the bite wound, Vaccine for dogs and cat, HDCV for humans
Rabies Virus
● Vector control, Good sanitation, PPE
Vesicular Stomatitis Virus
● Headache, fever,sore throat,
Rabies Virus
● Hallucinations
Rabies Virus
● Pain or tingling at the site of the bite
Rabies Virus
● Afraid of water - hydrophobia
Rabies Virus
● Respiratory arrest, death in 1-6 days
Rabies Virus
● Seizures
Rabies Virus
● Difficulty in drinking
Rabies Virus
Vesicular Stomatitis Virus
● Animals: on the feet, mouth, teats, and hooves
Blister-like lesions
Vesicular Stomatitis Virus
● Humans: (?) symptoms
Influenza-like
Detection of specific antibodies against rabies virus
Rabies Virus
● Detection of antibodies against VSV
Vesicular Stomatitis Virus
● 60-65 nm
Eastern,Western andEquineEncephalitis Virus
● It has a single stranded, positive-sense RNA genome
Eastern,Western andEquineEncephalitis Virus
● (German measles) is a generally mild, selflimited illness
Rubella Virus
● A single member of the genus Rubivirus in the family Togaviridae.
Rubella Virus
● Is a spherical, 40- to 80-nm, positive-sense, singlestranded RNA virus with spike-like
Rubella Virus
● 60-70nm
Chikungunya
● Spherical
Chikungunya
● Positive-sense, single strand RNA genome surrounded by a lipid envelope
Chikungunya
Virus enters the bloodstream via the saliva of an infected female mosquito
Eastern,Western andEquineEncephalitis Virus
● Direct contact with the person who has rubella
Rubella Virus
● Droplet contact with respiratory secretions
Rubella Virus
● Possible transplacental infection of fetus during viremia
Rubella Virus
virus infection begins when an infected mosquito bites a human and the virus is introduced into the skin and bloodstream.
Chikungunya
The virus replicates in the fibroblasts of the dermis and disseminates through the bloodstream to several tissues.
Chikungunya
Viral replication occurs in target tissues — mainly muscles, joints, and skin, as well as the liver, spleen, and meninges in neonates and patients with underlying conditions.
Chikungunya
Inflammatory cells are recruited to infected tissues.
Chikungunya
Joints (including in the fingers, wrists, elbows, knees, ankles, and toes) become inflamed in response to viral replication and inflammatory infiltrates.
Chikungunya
● Serology and viral identification by PCR on a cerebrospinal fluid obtained after a lumbar puncture
Eastern,Western andEquineEncephalitis Virus
● Blood tests
Rubella Virus
● Nasal or throat swabs.
Rubella Virus
● Urine tests
Rubella Virus
● It may be detected directly in blood samples collected using test such as reverse transcriptase-polymerase chain reaction ( RT-PCR)
Chikungunya
● There is no vaccine available
Eastern,Western andEquineEncephalitis Virus
● Routine childhood immunization
Rubella Virus
● Immunization of susceptible adolescent
Rubella Virus
● Valneva vaccine
Chikungunya
● Fever
Eastern,Western andEquineEncephalitis Virus
● Severe depression ―sleeping sickness‖
Eastern,Western andEquineEncephalitis Virus
● Behavior changes
Eastern,Western andEquineEncephalitis Virus
● Impaired vision
Eastern,Western andEquineEncephalitis Virus
● Circling or head pressing
Eastern,Western andEquineEncephalitis Virus
● Muscle twitches
Eastern,Western andEquineEncephalitis Virus
● Inability to swallow
Eastern,Western andEquineEncephalitis Virus
● Paralysis
Eastern,Western andEquineEncephalitis Virus
● Convulsions, Death
Eastern,Western andEquineEncephalitis Virus
● Mild fever of 102 F (38.9 C) or lower
Rubella Virus
● Headache
Rubella Virus
● Stuffy or runny nose
Rubella Virus
● Red, itchy eyes
Rubella Virus
● Enlarged, tender lymph nodes
Rubella Virus
● A fine, pink rash that begins on the face
Rubella Virus
● Aching joints
Rubella Virus
● High fever
Chikungunya
● Rigors
Chikungunya
● Headache
Chikungunya
● Photophobia
Chikungunya
● Petechial rash or maculopapular rash
Chikungunya
● IgG Avidity Testing
Rubella Virus
● Specific igM antibodies usually usually appear upon cessation of viremia, usually by day 5-7 into the illness and stay positive for 3 to 6 months
Chikungunya