Rubella dr harivansh chopra

Rubella –
German Measles
Dr. Harivansh Chopra,
DCH., MD
Professor
Community Medicine,
LLRM Medical College,
Meerut.
harichop@gmail.com

DR. HARIVANSH CHOPRA
Objectives of Lecture
1. To study the epidemiology of Rubella.
2. To study Rubella in pregnancy and its
management.
3. Understanding the manifestations of
Congenital Rubella.
4. Prevention of Rubella and strategies
for Rubella vaccination.

Why Rubella is k/a
“German Measles”?
The word "German" in the name of this
disease has nothing to do with the
country. The name likely comes from
the Latin term "germanus" meaning
"similar." And indeed, rubella and
measles (rubeola) share some
characteristics, but they're caused by
different viruses.

Etiology  Pleomorphic RNA virus.
Family Togaviridae;
Genus Rubivirus.
RUBELLA
(GERMAN / 3-DAY MEASLES)

Epidemiology 
1. Spread by oral droplet or
transplacentally through
congenital infection.
RUBELLA

Epidemiology 
2. The period of infectivity is 7 days
prior to onset of rash and 7 days
after disappearance of rash.
3. The incubation period ranges
from 14 days to 21 days (average
= 18 days).
RUBELLA

Epidemiology 
4. Peak incidence of disease in
children 3-10 yrs. of age
(> 70% of cases in developed
countries occur in > 15 yrs.
old).
5. Many infections are sub
clinical with a ratio of 2:1;
inapparent to overt disease.
RUBELLA

Epidemology 
6. In closed population, almost
100% of susceptible individuals
may become infected. In family
setting spread of virus is less –
50-60%.
RUBELLA

RUBELLA
Epidemiology
7. A single attack usually confers
permanent immunity.
8. Epidemics occurred every 6-9 years
before vaccine was available.
9. Infants with rubella are a source of
infection for older children who are
not immune & for non-immune
adults, including pregnant women
& nursery personnel.

RUBELLA
Epidemiology
10. Disease occurs in seasonal
pattern i.e. during the later
winter and spring, with
epidemics repeating every
4 – 9 years.

1. Prodromal phase – Mild catarrhal symptoms;
shorter than measles; may be so mild as to go
unnoticed.
2. Most characteristic sign is Retroauricular,
Posterior Cervical & Post-Occipital adenopathy
which is tender.
3. Lymphadenopathy is evident at least 24 hrs.
before rash appears & remains for 1 week or
more.
CLINICAL MANIFESTATIONS
OF RUBELLA

3. An enanthem may appear just before the
onset of skin rash. It is discrete rose spots
on soft palate that may coalesce into a red
bluish & extend over the fauces.
(Forchheimer spots)
4. Rash begins on face & spread quickly; rash
may be fading on face by the time it appears
on the trunk.
OF RUBELLA

OF RUBELLA
5. Rash is discrete maculo-papular with large
areas of flushing; spreads rapidly over the
entire body within 24 hrs.
6. Rubella without a rash has been described.
7. Fever is slight or absent during the rash &
persists for 1-2 or occasionally 3 days.

8. Anorexia, Headache & Malaise are
not common.
9. Spleen is often slightly enlarged.
10. Thrombocytopenia is rare.
11. Paraesthesia.
OF RUBELLA

12. In older children Polyarthritis may with
Arthralgia & Swelling, Tenderness &
Effusion but without Residuum; Small
joints of hands are affected most
frequently. Duration is usually several days
to 2 weeks rarely for months.
13. Orchidalgia also reported.
OF RUBELLA

Viral Others
Measles. Meningococcemia.
Roseola Infantum. Typhoid fever.
Erythema Infectiosum. Scarlet fever.
Infectious
Mononucleosis.
Live viral vaccine.
Drug eruption.
DIFFERENTIAL DIAGNOSIS

Stage of
Gestation
(weeks)
when mother
is infected
Percentage
of fetus
infected
Percentage
of infected
fetus
damaged
Overall risk
damages to
fetus (in
percent)
< 11 90 100 90
11-16 55 37 20
17-26 33 0 0
27-36 53 0 0
Risk of damage to fetus by Maternal Rubella
during pregnancy

Latex agglutination, enzyme immunoassay,
passive hemagglutination,
and fluorescent immunoassay appear
to be equal or superior to the HI test in
sensitivity.
Immunoglobulin (Ig) M antibodies are
detectable in the first few days of illness
and are considered diagnostic.
DIAGNOSIS

Detection of IgM antibodies, which do not
cross the placenta, in the newborn is
especially useful for the diagnosis of
congenital rubella syndrome.
Seroconversion, or a fourfold increase in
IgG titer, is diagnostic.
DIAGNOSIS

TREATMENT
SYMPTOMATIC
PARACETAMOL FOR FEVER

COMPLICATIONS
Complications are relatively
uncommon in childhood.
Encephalitis similar to that seen with
measles occurs in about 1 in 6,000
cases. The severity is highly
variable, and there is an overall
mortality rate of 20%
Thrombocytopenic purpura occurs
at an overall rate of 1 in 3,000
cases.

PREGNANCY & RUBELLA
Pregnant Female with unknown immune status
exposed to Rubella
ANTIBODY TESTING
SUSCEPTIBLE NOT SUSCEPTIBLE
Abortion advised Reassurance

PREGNANCY & RUBELLA
Female susceptible but
Abortion unacceptable
Rubella Immunoglobulin
0.55 ml/kg body weight given IM
Under no condition in pregnancy should an Active
Immunisation against Rubella be performed in
pregnancy.

1. IUGR is most common.
2. Cataract B/L or U/L; Associated
with micro-ophthalmia.
3. Blueberry skin lesion, similar to
CMV infection.
CONGENITAL RUBELLA SYNDROME

4. Myocarditis & structural cardiac
defects – PDA or Pulmonary Artery
Stenosis.
5. Hearing loss from Sensorineural
deafness.
6. May have active meningo-
encephalitis at birth; Later motor &
mental retardation.

7. Pneumonia.
8. Hepatitis.
9. Thrombocytopenic Purpura.

10. Pancreatitis.
11. Syndactyly.
12. Retinal lesions –
Salt and Pepper retinitis.

Prevention against Rubella
• Rubella Vaccine – RA 27/3
1. Produced in human diploid fibroblast.
2. Produces an immune response more
closely paralleling natural infection & largely
prevents sub clinical infection.
3. Single dose of 0.5 ml subcutaneously
4. Seroconversion in >95% vaccinees.
5. Immunity persists for at least 14 – 16 years
and probably lifelong.

MMR Vaccine
• Composition –
1. Live hyperattenuated Measles virus
(Schwartz strain) – 1000 TCID50
2. Live attenuated Mumps virus (Urabe AM 9
strain) – 5000 TCID50
3. Live attenuated Rubella virus (Wistar RA
27/3M strain) – 1000 TCID50
4. Stabilizer excipient (containing human
albumin)

MMR Vaccine
• Route and Dose –
1. 0.5 ml Subcutaneous or Intramuscular.
2. Single dose between 12 and 15 months of
age (Recommended age).
3. Second dose recommended 6 months later
in children vaccinated below 12 months of
age, particularly in collective environment.

MMR Vaccine
1.It is freezed dried
vaccine
2.Has to be
reconstituted with
distilled water
3.Reconstituted
vaccine must be
used as early as
possible

MMR Vaccine
1. It has shell life for
2 years
2. Must be stored
between
2-8 degree
centirgade

Complications of vaccine
1. Fever
2. Rash
3. Rarely S.S.P.E

Contraindications to Rubella
1. Congenital or Acquired
immunodepressions. (An infection
with HIV should not be
contraindication to MMR vaccination,
but advised only under specialised
paediatric team).
2. True allergy to egg proteins.

Contraindications to Rubella
3. Recent injection of Immunoglobulins
(Vaccine must not be given till 3 months
after Immunoglobulin transfusion, or
Immunoglobulins must not be given 2
weeks after vaccination).
4. Pregnancy (Recipients of vaccine must
not be advised to become pregnant over
next 3 months).

Vaccination Strategy – Rubella
1. First protect women of
childbearing age (15 – 34 or
39 years of age).
2. Then interrupt transmission
of Rubella by vaccinating
children 1 – 14 years of age.
3. Subsequently vaccinating all
children at 1 year of age.

Conclusion
1. Rubella is a vaccine preventable
disease, which is very similar to
Measles in its presentation.
2. A relatively mild clinical manifestation
but hazardous to developing foetus if
contracted in pregnancy.
3. Affected foetus presents with a variety
of signs grouped under “Congenital
Rubella Syndrome”.

MCQ
1. Which of the following disease can
result in congenital anomaly in the
newborn child
1. HIV.
2. Hepatitis B.
3. Rubella.
4. All of the above.
Answer – 3.

MCQ
2. “Three day measles” is another
name for
1. Roseola Infantum.
2. Erythema Infectiosum.
3. Scarlet fever.
4. None of the above.
Answer – 4.

MCQ
3. The most characteristic
differentiating feature between
measles and rubella is
1. Type of rash.
2. Prodromal period.
3. Tender enlargement of cervical group of
glands.
4. Degree of fever.
Answer – 3.

MCQ
4. The efficacy of rubella vaccine is
1. 80%
2. 90%
3. 95%
4. 98%
Answer – 3.

MCQ
5. The pregnancy should be deferred
in the recipient of Rubella vaccine
for a period of
1. Next 1 month
2. Next 2 months
3. Next 3 months
4. Next 6 months
Answer – 3.

MCQ
• Q-6 Incubation period of rubella is
1. 1 – 7 days
2. 7 – 14 days
3. 14 – 21 days
4. 21 – 28 days
Ans 3

Rubella dr harivansh chopra

Empfohlen

Empfohlen

Weitere ähnliche Inhalte

Was ist angesagt?

Was ist angesagt? (20)

Ähnlich wie Rubella dr harivansh chopra

Ähnlich wie Rubella dr harivansh chopra (20)

Mehr von Harivansh Chopra

Mehr von Harivansh Chopra (20)

Kürzlich hochgeladen

Kürzlich hochgeladen (20)

Rubella dr harivansh chopra