Immunisations Flashcards
What is a vaccine?
Substance that stimulates the production of antibodies and provides active immunity
What is active immunity?
Protection produced by individuals own immune system
How is active immunity acquired?
Infection
Vaccination
What is passive immunity?
Protection provided by transfer of antibodies from immune individuals
What are the main types of vaccine?
Live attenuated
Inactivated
Which vaccinations are live attenuated?
Rotavirus
MMR
Nasal flu
Which vaccines are inactivated?
Diptheria Tetanus Meningitis Polio Pertussis Pneumococcus
What organism causes diptheria?
Corynebacterium diptheria
What type of organism is Corynebacterium diptheria?
Toxin producing gram positive cocci
How is diptheria spread?
Respiratory droplet
What is the incubation period of diptheria?
3-5 days
What happens in diptheria?
Toxin kills cells which form a pseudomembrane
Swelling of tissues in neck = bulls neck
What organism causes tetanus?
Clositridium tetani
What type of organism is clostridium tetani?
Gram positive bacillus
How is tetanus spread?
Spores which enter open wounds
What happens in tetanus?
Blocks inhibitory neurotransmitters = widespread motor neurone activation
Widespread muscle spasms
What organism causes whooping cough?
Bordatella pertussis
What type of organism is bordatella pertussis?
Gram positive coccobacillus
How is whooping cough spread?
Droplet spread
What is the incubation period of whooping cough?
7-10 days
What happens in whooping cough?
Stage 1 = catarrhal phase
- 1-2 weeks
- flu symptoms
Stage 2 = paroxysmal phase
- up to 10 weeks
- intense coughing periods - followed by whoop
Stage 3 = convalescent phase
- cough that lasts for weeks
How is whooping cough diagnosed?
FBC - very high WBC
Deep pernasal pharyngeal swab culture
When is whooping cough vaccinated against?
Maternal vaccination at 28-32 weeks
What organism causes poliomyelitis?
Poliovirus
What type of organism is poliovirus?
RNA enterovirus
How is polio spread?
Faecal-oral
What is the incubation period of polio?
3-21 days
What happens in polio?
Subclinical = mild coryzal symptoms
Non-paralytic
- fever
- headache
- sore throat
- neck stiffness
Paralytic symptoms
What is a conjugare vaccine?
Vaccine containing bacterial capsular polysaccharide joined to a protein to enhance immunogenicity
What organism causes Hib disease?
Haemophilus influenza type B
What type of organism is haemophilus influenza?
Gram negative coccobacillus
How is haemophilus influenza spread?
Droplet spread
What is the incubation period of haemophilus influenza?
3-5 days
What type of organism is rotavirus?
RNA virus
How is rotavirus spread?
Faecal-oral transmission
What is the incubation period of rotavirus?
2 days
What happens in rotavirus infections?
Mild fever
Watery diarrhoea
Vomiting
What organism causes rubella?
Togavirus
What type of organism is togavirus?
RNA virus
How is rubella spread?
Droplet spread
What is the incubation period of rubella?
14-21 days
What are the features of rubella?
Coryzal features
Lymphadenopathy
Erythematous rash
What is the risk of rubella infection?
Congenital rubella syndrome
What are features of congenital rubella syndrome?
Sensorineural deafness
Eye abnormalities
Congenital heart diseae
Learning difficulties
What organism causes mumps?
Paramyxovirus
How is mumps spread?
Airborne
Droplet spread
What is the incubation period for mumps?
17 days
What happens in mumps?
Bilateral parotid swelling
What organism causes measles?
Morbilivirus
How is measles spread?
Airborne
Droplet spread
What is the incubation period of measles?
10 days
What happens in measles?
COyrza
Conjuctivitis
Koplik spots
Rash
Which vaccines contain egg?
Live flu
Rabies
Yellow fever