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reported by:
Joan C. Vargas
Other names:
Malignant pustule
Malignant edema
Woolsorter’s disease
Ragpicker’s disease
Etiologic agent:
Bacillus Anthracis
-a large, aerobic, spore-forming, gram positive
rod-shaped microorganism that is capsulated
and non-motile. This microorganism grows
in chain.
-Like many other members of the genus Bacillus, Bacillus
anthracis can form dormant endospores often referred to
as spores that are able to survive in harsh conditions for
decades or even centuries. Such spores can be found on
all continents, even Antarctica. When spores are inhaled,
ingested, or come into contact with a skin lesion on a
host, they may become reactivated and multiply rapidly.
 Bacillus anthracis bacterial spores are soil-borne,

and, because of their long lifetime, they are still
present globally and at animal burial sites of anthraxkilled animals for many decades; spores have been
known to have reinfected animals over 70 years after
burial sites of anthrax-infected animals were
disturbed.
Diagnosis:
 Gram staining
 Test of infected skin/skin sores
 Blood testing

 CT scans and Chest X-Ray
 Lumbar puncture (spinal tap)
 Endoscopy of the intestine and throat
Source of Infection:
Contact with spores through:
 tissues of infected animals such as






cattle, sheep, horses, goats, and other wild
herbivores.
contaminated hair, wool, hides, and other products
made from the said animals.
soil associated by infected animals
inhalation of aerosolised spores
ingestion of contaminated undercooked meat.
Signs and Symptoms
Cutaneous (skin) anthrax
 Cutaneous anthrax is typically caused when
Bacillus anthracis spores enter through cuts on
the skin. This form accounts for over 95% of
anthrax cases.

 Lesions usually occur on exposed skin and

often commence with itchiness.
They pass through several stages:
 papular stage
 vesicular stage with a blister that often becomes
hemorrhagic
 eschar stage that appears two to six days after the
haemorrhagic vesicle dries to become a depressed black
scab (malignant pustule) which may have surrounding
redness and extensive edema (swelling).
Anthrax lesions are usually painless but pain may result
due to surrounding edema. Untreated lesions can
progress to involve regional lymph nodes. An
overwhelming septicaemia can occur in severe cases.
 Symptoms include muscle aches and

pain, headache, fever, nausea, and vomiting.
 Cutaneous anthrax is rarely fatal if treated, because

the infection area is limited to the skin. Without
treatment, about 20% of cutaneous skin infection
cases progress to toxemia and death.
Skin lesion of anthrax on face

Skin lesions of anthrax on neck
Inhalational (Pulmonary) anthrax
 also known as Woolsorter’s disease

 results from breathing anthrax spores into the lungs.
 Earliest symptoms resemble those of a respiratory

infection such as mild fever and sore throat.
 After one to three days of acute phase, increasing
fever, dyspnea, stridor, hypoxia, and
hypertension occur usually leading to death within
24 hours.
inhalational route normally proceeds as follows:

 Once the spores are inhaled, they are transported

through the air passages into the tiny air particles
sacs (alveoli) in the lungs.
 the spores get picked up in the lungs by scavenger
cells called macrophages. Most of the spores are
killed. Unfortunately, some survive and are
transported to the lymph nodes in the central chest
cavity (mediastinum).
 Damage caused by the anthrax spores and bacilli to
the central chest cavity can cause chest pain and
difficulty in breathing.
 . Once in the lymph nodes, the spores germinate into

active bacilli that multiply and eventually burst the
macrophages, releasing many more bacilli into the
bloodstream to be transferred to the entire body.
 Once in the blood stream, these bacilli release three
proteins named lethal factor, edema factor, and
protective antigen.
 These toxins are the primary agents of tissue destruction,
bleeding, and death of the host.
 If antibiotics are administered too late, even if the
antibiotics eradicate the bacteria, some hosts will still die
of toxemia. This is because the toxins produced by the
bacilli remain in their system at lethal dose levels.
Chest X-ray showing widened chest cavity
resulting from inhalation anthrax
Gastrointestinal Anthrax
 results from ingestion of inadequately-cooked meat

from animals with anthrax.
 symptoms include fever, nausea, and vomiting, loss
of appetite, abdominal pain, bloody diarrhea, and
sometimes rapidly developing ascitis.
 After the bacterium invades the bowel system, it
spreads through the bloodstream throughout the
body, making even more toxins on the way.
 This form of anthrax is the rarest .
Mode of Transmission:
 Direct transmission through cutaneous contact with infected animals or
contaminated animal products

 Indirect transmission –
through ingestion of contaminated meat

 Airborne transmission –
through inhalation of air contaminated by spores
Incubation period:
 Cutaneous anthrax occurs 1 to 7 days

(usually 2 to 5 days) after spores enter the
body through breaks in the skin.
 Inhalational anthrax occurs 2 to 7 days (but
sometimes up to 2 months) after inhaling
large amounts of anthrax spores
 Gastrointestinal anthrax occurs 2 to 5 days
after swallowing spores
Period of Communicability
 Transmission of anthrax infection from

person to person is highly unlikely.
 Airborne transmission from person to
person does not occur.
 Articles and soil contaminated with spores
may remain infective for years.
Prevention and Control:
 Sterilize hair, wool or hides, bone meal or other feed of





animal origin prior to processing.
Avoid working with raw animal hides, fur or skin,
especially those of goats, sheep, or cows.
Do not eat meat that has not been properly slaughtered
and cooked.
Immunization of high risk individuals usually laboratory
workers who are liable to handle B. anthracis
Anyone working with anthrax in a suspected or confirmed
victim should wear respiratory equipment.
 Protective, impermeable clothing and equipment such as

rubber gloves, rubber apron, and rubber boots with no
perforations should be used when handling the body.
 If an animal anthrax case is confirmed, the affected
property is quarantined, potentially exposed stock
vaccinated, dead animals buried and contaminated sites
disinfected.
 Control of dusts and proper ventilation in hazardous
industries especially those that handle raw animal
materials
Treatment:
 Cutaneous/gastrointestinal anthrax
- Ciprofloxacin, penicillin or doxycycline are the
drugs of choice, usually given for 7–10 days. The
duration of therapy for gastrointestinal anthrax is not well
defined.
- If the case is associated with a bio-terrorist attack
involving aerosolised anthrax where the risk is high,
ciprofloxacin or doxycycline are recommended and
should be given for at least 60 days.
 Inhalational anthrax
- Recommended initial treatment of pulmonary anthrax is an
intravenous multi-drug regimen of either ciprofloxacin or
doxycycline along with one or more agents to which the organism is
typically sensitive.
- Ciprofloxacin has been recommended on the basis of in vivo
(animal) findings. It should be used in preference to doxycycline in
cases where meningitis is suspected because of the lack of
adequate central nervous system penetration by the latter.
- After susceptibility testing and clinical improvement, the empiric
regimen may be altered. A penicillin-based antibiotic, such as
amoxycillin or amoxycillin/
clavulanic acid may then be used to complete the course.
-Treatment should be continued for 60 days in all cases of
inhalational anthrax.
Health teachings:
 Public-health measures to prevent contact with





infected animals are invaluable.
A suspected or confirmed case of Anthrax must be
reported immediately.
Educate employees who are handlers of potentially
infected articles in the proper care of skin abrasions.
Stretch the importance of acquiring medical help as
soon as possible.
Advice high risk individuals on acquiring
immunization.

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Anthrax

  • 1.
  • 3. Other names: Malignant pustule Malignant edema Woolsorter’s disease Ragpicker’s disease
  • 4. Etiologic agent: Bacillus Anthracis -a large, aerobic, spore-forming, gram positive rod-shaped microorganism that is capsulated and non-motile. This microorganism grows in chain. -Like many other members of the genus Bacillus, Bacillus anthracis can form dormant endospores often referred to as spores that are able to survive in harsh conditions for decades or even centuries. Such spores can be found on all continents, even Antarctica. When spores are inhaled, ingested, or come into contact with a skin lesion on a host, they may become reactivated and multiply rapidly.
  • 5.  Bacillus anthracis bacterial spores are soil-borne, and, because of their long lifetime, they are still present globally and at animal burial sites of anthraxkilled animals for many decades; spores have been known to have reinfected animals over 70 years after burial sites of anthrax-infected animals were disturbed.
  • 6. Diagnosis:  Gram staining  Test of infected skin/skin sores  Blood testing  CT scans and Chest X-Ray  Lumbar puncture (spinal tap)  Endoscopy of the intestine and throat
  • 7. Source of Infection: Contact with spores through:  tissues of infected animals such as     cattle, sheep, horses, goats, and other wild herbivores. contaminated hair, wool, hides, and other products made from the said animals. soil associated by infected animals inhalation of aerosolised spores ingestion of contaminated undercooked meat.
  • 9. Cutaneous (skin) anthrax  Cutaneous anthrax is typically caused when Bacillus anthracis spores enter through cuts on the skin. This form accounts for over 95% of anthrax cases.  Lesions usually occur on exposed skin and often commence with itchiness.
  • 10. They pass through several stages:  papular stage  vesicular stage with a blister that often becomes hemorrhagic  eschar stage that appears two to six days after the haemorrhagic vesicle dries to become a depressed black scab (malignant pustule) which may have surrounding redness and extensive edema (swelling). Anthrax lesions are usually painless but pain may result due to surrounding edema. Untreated lesions can progress to involve regional lymph nodes. An overwhelming septicaemia can occur in severe cases.
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  • 12.  Symptoms include muscle aches and pain, headache, fever, nausea, and vomiting.  Cutaneous anthrax is rarely fatal if treated, because the infection area is limited to the skin. Without treatment, about 20% of cutaneous skin infection cases progress to toxemia and death.
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  • 15. Skin lesion of anthrax on face Skin lesions of anthrax on neck
  • 16. Inhalational (Pulmonary) anthrax  also known as Woolsorter’s disease  results from breathing anthrax spores into the lungs.  Earliest symptoms resemble those of a respiratory infection such as mild fever and sore throat.  After one to three days of acute phase, increasing fever, dyspnea, stridor, hypoxia, and hypertension occur usually leading to death within 24 hours.
  • 17. inhalational route normally proceeds as follows:  Once the spores are inhaled, they are transported through the air passages into the tiny air particles sacs (alveoli) in the lungs.  the spores get picked up in the lungs by scavenger cells called macrophages. Most of the spores are killed. Unfortunately, some survive and are transported to the lymph nodes in the central chest cavity (mediastinum).  Damage caused by the anthrax spores and bacilli to the central chest cavity can cause chest pain and difficulty in breathing.
  • 18.  . Once in the lymph nodes, the spores germinate into active bacilli that multiply and eventually burst the macrophages, releasing many more bacilli into the bloodstream to be transferred to the entire body.  Once in the blood stream, these bacilli release three proteins named lethal factor, edema factor, and protective antigen.  These toxins are the primary agents of tissue destruction, bleeding, and death of the host.  If antibiotics are administered too late, even if the antibiotics eradicate the bacteria, some hosts will still die of toxemia. This is because the toxins produced by the bacilli remain in their system at lethal dose levels.
  • 19. Chest X-ray showing widened chest cavity resulting from inhalation anthrax
  • 20. Gastrointestinal Anthrax  results from ingestion of inadequately-cooked meat from animals with anthrax.  symptoms include fever, nausea, and vomiting, loss of appetite, abdominal pain, bloody diarrhea, and sometimes rapidly developing ascitis.  After the bacterium invades the bowel system, it spreads through the bloodstream throughout the body, making even more toxins on the way.  This form of anthrax is the rarest .
  • 21. Mode of Transmission:  Direct transmission through cutaneous contact with infected animals or contaminated animal products  Indirect transmission – through ingestion of contaminated meat  Airborne transmission – through inhalation of air contaminated by spores
  • 22. Incubation period:  Cutaneous anthrax occurs 1 to 7 days (usually 2 to 5 days) after spores enter the body through breaks in the skin.  Inhalational anthrax occurs 2 to 7 days (but sometimes up to 2 months) after inhaling large amounts of anthrax spores  Gastrointestinal anthrax occurs 2 to 5 days after swallowing spores
  • 23. Period of Communicability  Transmission of anthrax infection from person to person is highly unlikely.  Airborne transmission from person to person does not occur.  Articles and soil contaminated with spores may remain infective for years.
  • 24. Prevention and Control:  Sterilize hair, wool or hides, bone meal or other feed of     animal origin prior to processing. Avoid working with raw animal hides, fur or skin, especially those of goats, sheep, or cows. Do not eat meat that has not been properly slaughtered and cooked. Immunization of high risk individuals usually laboratory workers who are liable to handle B. anthracis Anyone working with anthrax in a suspected or confirmed victim should wear respiratory equipment.
  • 25.  Protective, impermeable clothing and equipment such as rubber gloves, rubber apron, and rubber boots with no perforations should be used when handling the body.  If an animal anthrax case is confirmed, the affected property is quarantined, potentially exposed stock vaccinated, dead animals buried and contaminated sites disinfected.  Control of dusts and proper ventilation in hazardous industries especially those that handle raw animal materials
  • 26. Treatment:  Cutaneous/gastrointestinal anthrax - Ciprofloxacin, penicillin or doxycycline are the drugs of choice, usually given for 7–10 days. The duration of therapy for gastrointestinal anthrax is not well defined. - If the case is associated with a bio-terrorist attack involving aerosolised anthrax where the risk is high, ciprofloxacin or doxycycline are recommended and should be given for at least 60 days.
  • 27.  Inhalational anthrax - Recommended initial treatment of pulmonary anthrax is an intravenous multi-drug regimen of either ciprofloxacin or doxycycline along with one or more agents to which the organism is typically sensitive. - Ciprofloxacin has been recommended on the basis of in vivo (animal) findings. It should be used in preference to doxycycline in cases where meningitis is suspected because of the lack of adequate central nervous system penetration by the latter. - After susceptibility testing and clinical improvement, the empiric regimen may be altered. A penicillin-based antibiotic, such as amoxycillin or amoxycillin/ clavulanic acid may then be used to complete the course. -Treatment should be continued for 60 days in all cases of inhalational anthrax.
  • 28. Health teachings:  Public-health measures to prevent contact with     infected animals are invaluable. A suspected or confirmed case of Anthrax must be reported immediately. Educate employees who are handlers of potentially infected articles in the proper care of skin abrasions. Stretch the importance of acquiring medical help as soon as possible. Advice high risk individuals on acquiring immunization.

Editor's Notes

  1. cutaneous anthrax with ulceration