typhoid fever
FEVER
BY: CATHERINE E. JOAQUIN
REPORT CONTENT
INTRODUCTION
SIGNS AND SYMPTOMS
PATHOGENS AND VIRULENCE FACTORS
PATHOGENESIS/TRANSMISSION
EPIDEMIOLOGY
DIAGNOSIS, TREATMENT AND PREVENTION
INTRODUCTION
What are Food & Waterborne
Diseases?
Diseases
that are supported, carried
or transmitted by food & water.
Examples
are: Cholera, Hepatitis A,
Amoebic Dysentery, & Typhoid Fever
INTRODUCTION
What is a Typhoid Fever?
It
is an acute bacterial infection
characterized by fever, headache
and abdominal discomfort.
Also
known as ENTERIC FEVER
PATHOGENS & VIRULENCE FACTORS
What causes Typhoid Fever?
Typhoid
Fever is caused by the
bacterium Salmonella typhi from
the family Enterobacteriacea.
Salmonella
typhi is a gram-negative
bacteria that is motile due to its
peritrichous flagella
The
bacteria grows best at 37°C.
Color pink
therefore Gramnegative
With peritrichous
flagella
PATHOGENS & VIRULENCE FACTORS
can also be caused by Salmonella
paratyphi, a related bacterium that
usually causes a less severe illness
known as Paratyphoid Fever.
It
PATHOGENESIS
How does the bacteria cause
disease?
Ingestion of
contaminated
food or
water
Salmonella
bacteria
penetrate the
epithelial wall
of the small
intestine
Phagocytosed
by
macrophages
PATHOGENESIS
How does the bacteria cause
disease?
S. typhi then
alters its
structure to
resist
destruction
and allow
them to exist
within the
macrophage
Spread via the
lymphatics
while inside
the
macrophages
Travels to the
reticulo
endothelial
system and
then to the
different
organs
throughout
the body
PATHOGENESIS
How does the bacteria cause
disease?
Goes back to
the
bloodstream
accompanied
with
development
of symptoms
Salmonella
bacteria may
be passed
out through
the stool
Cycle
continues
SIGNS AND SYMPTOMS
Sustained High Fever
Loss of Appetite
Malaise
Rose Spots
Abdominal
Manifestation
Relative Bradycardia
SIGNS AND SYMPTOMS
WARNING SIGNS
(Terminal Stage)
Dehydration/exhaustion
Unable
to feed/take oral medications
Bloody/black tarry stool
Severe abdominal pain
Cold, clammy skin with hypotension
Pallor
Behavioral change (typhoid psychosis)
SIGNS AND SYMPTOMS
Typhoid Terminal State
EPIDEMIOLOGY
Typhoid fever occurs
worldwide, primarily in
developing nations whose
sanitary conditions are poor.
Typhoid fever is endemic in
Asia, Africa, Latin America,
the Caribbean, and Oceania.
Typhoid fever infects roughly
21.6 million people and kills an
estimated 200,000 people
every year.
EPIDEMIOLOGY
WHO
identifies typhoid as a serious
health problem
Incidence
is highest in children and
young adults between 5 to 19 years
old.
As of MW 27 (Jan.1-Jul.5,2014)
MODES OF TRANSMISSION
Water
Feces
and
Urine
from
Cases or
Carriers
Soil
Flies
Fingers
Foods
(raw
or
cooked)
Mouth
of
A
Well
Person
DIAGNOSIS
How is Typhoid Fever diagnosed?
Blood,
bone marrow or stool cultures
Widal
Test
Slide
agglutination
Typhidot
Antimicrobial
susceptibility testing
TREATMENT (DRUG)
How is Typhoid Fever treated?
Chloramphenicol
– original drug used to
treat typhoid fever but was replaced
because of many rare side effects
Antibiotics – ampicillin, trimethoprimsulfamethoxazole, amoxicillin and ciprofloxacin
Ceftriaxone, Azithromycin – antibiotics
used for MDR typhoid (multidrugresistant typhoid)
TREATMENT (GENERAL)
How is Typhoid Fever treated?
Isolation
and rest
Suitable diet include easy digested food
or half-liquid food and drinking more
water
IV fluid to maintain water and acid-base
and electrolyte balance
Symptomatic : antipyretic
PREVENTION
Health education...
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