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TINEA PEDIS
“ATHLETE’S
FOOT”
is a cutaneous infections that cause ringworm lesion of foot.
The
agents
causing these diseases are termed dermatophytes:
Microsporum sp. Trichophyton sp. Epidermophyton mycelium.
The fungi that
cause athlete's foot grow well in warm, damp areas. For
that reason, they often occur in and around swimming pools, showers,
and locker
rooms. That explains why tinea pedis is called athletes foot: it occurs
frequently
among athletes who use these facilities. |
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BACILLUS
ANTRACIS
Anthrax is an
acute infectious disease that
often leads to death, caused by the spore-forming bacterium Bacillus
anthracis. Anthrax can also
be spread by eating undercooked
meat from infected animals. Anthrax in few
hour after aspiration
of spores can cause fever, dyspnea, tachycardia, rales, cyanosis feeble
pulse,
hypotension. If untreated, patient die in 2 or 3 days. Lesion in
mediastinal
lymph nodes, cause edema, toxaemia, bacteremia. Anthrax spores
can and have been used in biological warfare since World War II.
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CLOSTRIDIUM
BOTULINUM
Clostridium
botulinum is an anaerobic, Gram-positive,
spore-forming rod that produces a potent neurotoxin.
The spores are heat-resistant and
can survive in foods that are incorrectly or minimally processed. Foodborne
botulism is a severe type of food
poisoning caused by the ingestion of foods containing the potent
neurotoxin
formed during growth of the organism. The toxin is heat labile and can
be
destroyed if heated at 80°C for 10 minutes or longer .The
disease is of
considerable concern because of its high mortality rate if not treated
immediately and properly. It can happen
with inadequately processed, home-canned foods, in meat products,
sausages, canned vegetables and seafood productc. |
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ADENOVIRUS Adenovirus is highly
contagious for infants and children, and are less frequent in
adults.Adenoviral
infections can cause several disease: gastroenteritis, conjunctivitis,
keratoconjunctivitis and pharyngoconjunctival fever, pharyngitis,
rhinitis, acute otitis media,
bronchiolitis, urinary infections.
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BACILLUS
CEREUS
Bacillus
cereus is a Gram-positive
bacteria produce toxin that are responsible of food poisoning. It is
normally
Common source of infection are: rice, cereals, beef, turkey, seafood,
salad,
potatoes, , sauces, soups, milk and various bakery products and
desserts. Bacillus cereus can be foun in
soil, air, dust, water,
animals and decaying matter. It can cause nausea, cramplike
abdominal pains and
watery diarrhoea, and vomiting. |
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ESCHERICHIA
COLI
Escherichia coli
can generally
cause several intestinal and extra-intestinal infections such as
urinary tract infections,
meningitis, peritonitis, mastitis, septicemia and pneumonia.
E. coli is often the causative
agent of Traveler's diarrhea.
The primary source of infection is ingestion of fecally contaminated
food
or water. |
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HEPATITIS
VIRUSES
Hepatitis
A
is a liver disease caused by hepatitis A virus. Hepatitis
A virus is spread from person to person by
putting something in the mouth that has been contaminated with the
stool of a
person with hepatitis A. This type of transmission is called
"fecal-oral." For this reason, the virus is more easily spread in
areas where there are poor sanitary conditions or where good personal
hygiene
is not observed. Hepatitis
B
s a serious disease caused by a virus that attacks the liver. The
virus, which
is called hepatitis B virus (HBV), can cause lifelong infection,
cirrhosis of
the liver, liver cancer, liver failure, and death.
HBV is spread when blood from an infected person
enters the body of a person who is not infected. For example, HBV is
spread
through having sex with an infected person, by sharing drugs, needles,
or from
an infected mother to her baby during birth.
Hepatitis C
is a liver disease caused by the hepatitis C virus (HCV), which is
found in the
blood of persons who have the disease. HCV is spread by contact with
the blood
of an infected person.
Hepatitis D
is a liver disease caused by the hepatitis D virus (HDV), a defective
virus
that needs the hepatitis B virus to exist. Hepatitis D virus (HDV) is
found in
the blood of persons infected with the virus. Hepatitis
E is a liver
disease that is spread by eating or drinking contaminated food or water.
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HIV
Human
immunodeficiency virus
(HIV) is a retrovirus
that causes A.I.D.S. (Acquired
Immune Deficiency Syndrome) It is a serious
disease of the immune system transmitted through blood products
especially by
sexual contact or contaminated needles. AIDS happens
concurrently
with numerous opportunistic infections and cancer that are normally
associated
with the HIV infection. The most common
neurological
complications of AIDS involve opportunistic infections of the brain
such as
progressive multifocal leucoencephalopathy (PML) and meningitis, other
opportunistic infections such as herpes zoster (shingles), peripheral
neuropathy,
depression,
and AIDS-related dementia.
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Legionella pneumophila
is the bacterium associated with Legionnaires' disease and Pontiac
fever. Legionella
transmission is via aerosols—the inhalation of mist droplets
containing the
bacteria Respiratory
transmission of this organism can lead to
infection, which is usually characterized by a gradual onset of
flu-like
symptoms. Patients may experience fever, chills, and a dry cough as
part of the
early symptoms. Patients can develop severe pneumonia. Legionnaires'
disease also has the potential to spread into other
organ-systems of the body such as the gastrointestinal tract and the
central
nervous system. Accordingly, patients with advanced infections may
experience
diarrhea, nausea, disorientation, and confusion. Usually involve
middle-aged or
immunosuppressed individuals. Pontiac fever is also caused by L.
pneumophila but does not produce the
severity of the symptoms found in Legionnaires' disease. The flu-like
symptoms
are still seen in Pontiac fever patients but pneumonia does not develop
and infection does not
spread beyond the lungs.
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LISTERIA
MONOCYTOGENES
Listeria
monocytogenes is a Gram-positive bacterium and causes the disease
listeriosis.
Listeriosis can cause septicemia, meningitis,
encephalitis, corneal ulcer, Pneumonia, and intrauterine or cervical
infections in pregnant
women, which may result in spontaneous abortion (2nd/3rd trimester) or
stillbirth. Surviving neonates of Fetomaternal Listeriosis may suffer
granulomatosis infantiseptica - pyogenic
granulomas
distributed over the whole body, and may suffer from physical
retardation. L. monocytogenes
has been associated with such foods as raw milk, pasteurized fluid
milkcheeses ice cream, raw vegetables,
sausages, raw and cooked poultry, raw meats, and raw and
smoked fish. Its ability to grow at
temperatures as low as 0°C permits multiplication in
refrigerated foods.
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MORBILLIVIRUS
Is a genus
of viruses of the family Paramyxoviridae that includes the causative
agents of
measles. Measles is one of the most contagious of all
human
viruses, with about forty million infections world wide each year, and
one to
two million deaths. Measles causes rash, cough, and fever, and can lead to
ear infection, pneumonia, conjunctivitis, diarrhea, seizures, brain
damage, and
death.
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BACTERIAL
MENINGITIS
Bacterial meningitis is a serious infection of
the
fluid in the spinal cord and the fluid that surrounds the brain.
Bacterial meningitis is most commonly caused by
one of
three types of bacteria: Haemophilus influenzae
type b, Neisseria
meningitidis, and Streptococcus pneumoniae
bacteria.
The bacteria are spread by direct close contact
with
the discharges from the nose or throat of an infected person.
Meningitis is usually caused
by an infection with a virus or a bacterium. Viral meningitis is
usually
relatively mild. It clears up within a week or two without specific
treatment.
Bacterial meningitis can cause severe disease that can result in brain
damage
and even death.
Common symptoms are high fever, headache, and
stiff
neck. These symptoms can develop over several hours, or they may take 1
to 2
days. Other symptoms can include nausea, vomiting, sensitivity to
light,
confusion, and sleepiness.
Advanced
bacterial meningitis
can lead to brain damage, coma, and death. Survivors can suffer
long-term
complications, including hearing loss, mental retardation, paralysis,
and
seizures. |
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PAROTITIS
This is a
disorder caused by viral
or bacterial infection of the salivary glands. Viral infections
such as
mumps often affect the salivary glands (mumps
most often affects the parotid glands). This form of parotitis is now
much more
rare in children because of the immunization vaccine. Parotitis can
cause
fever, abscess of salivary gland, localized spread of bacterial
infection (cellulitis, Ludwig's angina). Complications are
meningoencephalitis,
pancreatitis, orchitis, or deafness.
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PSEUDOMONAS
AERUGINOSA
Pseudomonas
aeruginosa is a Gram-negative bacterium which is
ubiquitous
in soil and water, and on surfaces in contact with soil or water.
Pseudomonas
aeruginosa is an opportunistic
pathogen, meaning that it exploits some break in the host defenses to
initiate an infection. It is primarily a nosocomial
pathogen.and
can causes septicemia, urinary tract infections, pneumonia, chronic
lung infections, endocarditis, dermatitis, and osteochondritis. |
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RUBELLA
Rubella is a
highly
contagious - but rare - respiratory infection caused by the Rubella
virus.
Symptoms of
rubella are: low
grade fever, swollen glands, joint pain, headache, conjunctivitis,
rash, red papules
on the area of soft palate. Rubella can cause congenital
rubella syndrome in the fetus with birth
defects: deafness, cataracts, heart defects, mental retardation, and
liver and
spleen damage.
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SALMONELLA
Salmonella
is a Gram-negative enterobacteria. Salmonella
enterica, has numerous serovars. Salmonella Typhi
causes typhoid fever. Other
salmonellae are frequent causes of foodborne illness,
especially from poultry
and raw eggs and more generally from food
that has been cooked or frozen, and not eaten straight away.
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SARS
Severe acute
respiratory
syndrome is an atypical
pneumonia highly
contagious and deadly
type of pneumonia which caused several outbreaks In Asia, Europe,
North America and South America. The disease is caused by the SARS
coronavirus
and can be spread through both casual and sexual
contact. In May 2005 the
World Health
Organization declared the disease eradicated'.
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STAPHYLOCOCCUS
AUREUS Staphylococcus
aureus is a bacterium that is a common coloniser of human
skin of hands and nose of a healthy person. Certain strains of
Staphylococcus aureus are also the causative agent
for septicemia,
infections, pneumonia, meningitis,
endocarditis.
Food poisoning occurs
after eating food containing toxins produced by the organism. The foods
may be
cooked (meats) or prepared ( cream
products). Some
strains are able to grow and produce highly heat-stable protein toxins
in foods contaminated by handling
if storage is inadequate.
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CAMPYLOBACTER JEJUNI
Campylobacter
jejuni is a Gram-negative
bacteria. Te name of the
illness
caused by Campylobacter
jejuni is Campylobacteriosis. The infection can
cause diarrhea, fever, abdominal
pain, nausea, headache and muscle pain. The illness usually occurs 2-5
days
after ingestion of the contaminated food or water. Campylobacter
jejuni contaminates raw chicken, raw
milk and non-chlorinated water.
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MICOBACTERIUM
TUBERCULOSIS
Mycobacterium.
tuberculosis
is an aerobe
Gram-positive mycobacterium. Tuberculosis is
the name of this serious illness
caused by this Mycobacteria that is
spread by airborne droplets that must penetrate deep into the
respiratory tree. Tuberculosis most
commonly affects the
lungs (as pulmonary TB) but can also affect
the central nervous system, the lymphatic system,
the circulatory system, the genitourinary system, bones, joints and
even the skin. With the AIDS
epidemic, the number of multiple drug
resistant (MDR) strains has increased, making it even more difficult to
treat
cases.
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VARICELLA HERPES
ZOSTER
Varicella Herpes Virus (VZV) belong to the
Herpes
Virus Family. This virus causes two major diseases, chicken-pox
(Varicella),
usually in childhood, and shingles, later in life.
Shingles
(Zoster) is a reactivation of an earlier
varicella infection. It is spread by respiratory aerosols or direct
contact
with skin lesions. |
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Warts are
caused by papillomaviruses that are transmitted environmentally or by
casual
skin-to-skin contact. Some human
papillomavirus (HPV)
types cause benign skin warts,
or papillomas
in hands and feet.
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VIRUS
INFLUENZAE
Influenza is an
acute
infectious disease caused by a member of the orthomyxovirus family:
influenza
virus A, B or, to a much lesser extent, influenza virus C. The virus is
spread person to person via small
particle aerosols (less than 10μm diameter) that can get into
respiratory tract. It
can also survive for a short time on surfaces and can be spread by this
route
if the virus is introduced into the nasal mucosa before it loses
infectivity.
Virus concentration in nasal and tracheal secretions remains high for
24 to 48
hours after symptoms start and may last longer in children. Influenza can
cause fever, myalgias, headache,
photophobia, tears, ache, dry cough, nasal discharge. Complications
are: acute laryngotracheobronchitis, pneumonia,
myositis, cardiac complications, Encephalopathy.
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YERSINIA
ENTERCOLITICA
Yersinia
enterocolitica is a bacteria that can cause fever, abdominal pain, and
diarrhea, which is often bloody. In older children and adults,
right-sided
abdominal pain and fever may be the predominant symptoms, and may be
confused
with appendicitis. The infection is
most often acquired by eating
contaminated food, especially raw or undercooked pork products or
drinking
contaminated water..
Its ability to
grow at temperatures as low
as 0°C permits multiplication in refrigerated foods. |
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VIRUS H5N1 or
AVIAN FLU
The virus called
H5N1 is a subtype of bird flu with
lethal effects on birds. Since 1997 is the first kind of bird flu that
infected
humans. It is mostly a bird disease and rarely infects humans; the
concern about
H5N1 is that it is constantly evolving at a very fast rate and could
create a
human flu pandemic that could kill many millions of people. |