|Most Rare Disease
The most rare disease is smallpox. In May 1978, the World Health
Organization registered zero cases in the previous six months worldwide
Most Resurgent Disease
The Soviet Unionís collapse led to crumbling health services, accelerating
the spread of diptheria. With 2,000 cases in 1991, the International Red
Cross estimates that there were 150,000 to 200,000 cases in the former USSR
countries in 1997.
Fastest Growing Disease
The UN AIDS report of December, 1998, states that 5.8 million new
cases of HIV infection occurred that year, at the rate of 11 people per
minute. Since 1997, the number of people living with the virus had risen by
10%, to 33.4 million worldwide. India holds the record for the country with
the largest HIV infected population, with an estimated 4 million HIV
positive people. In the worst affected state, Tamil Nadu (population, 25
million), a new survey revealed that half a million are infected with HIV
and that the infection rate is three times higher in villages than in
Most Common Noncontagious disease
Periodontal diseases like gingivitis are the world's more prevalent
Worst Flesh-eating disease
Dubbed the " flesh eating bug" by the media in May 194, the rare and
deadly necrotizing fasciitis (NF, has been around since WW I . The cunning
streptococcus a bacteria firsts attacks a layer of tissue below the skin,
leaving gangrene in its wake, for which there is only one cure- surgical
removal of the infected area.
Leprosy is the world's oldest disease, with cases found as far back as 1350
BC. The disease usually starts as a patch of skin that becomes insensitive
to pain, touch, and temperature. This is caused by the bacterium
Mycobacterium leprae. Leprosy is an infectious disease directly
transmitted from man to man.
Deadliest Avian Flu Outbreak
Avian flu, a strain of influenza previously only known to affect
birds, was found to have infected 16 people in Hong Kong, China, in 1997.
Four people died from the virus, which is the first to have been passed
directly from birds to humans.
Fewest Physicians Per Population
Malawi is the country with the fewest physicians per capita, with one
for every 49,118 people. The country with the smallest number of people per
physician is Monaco with 169.
Most Beneficial Parasite To Humans
The squirm-worthy leech (Hirudo medicinalis) was favored for
its bloodsucking powers back in the 19th century. Due to the healing
properties of its saliva the leech has wormed its way back into medicine -
and into the record books as the most beneficial parasite for humans! In
1991, a team of Canadian surgeons led by Dr Dean Vistnes, took advantage of
the anticoagulants in leeches' saliva to drain away blood and prevent it
from clotting during an operation to reattach a patient's scalp. The animals
used in this procedure had been specially cultured in sterile conditions.
|Highest Infectious Disease Death Rate
The west African island-republic of Sao Tome and Principe has 241
deaths per 100,000 per annum due to infectious diseases.
The new variant of Creutzfeldt-Jakob disease (CJD) first reared its
ugly head in the UK in the 1990s, together with its partner-in-crime BSE
(Mad Cow Disease). CJD, which leads to dementia and a physical breakdown in
humans, is the result of eating infected cow's meat. It's enough to put you
off your burger and it did - all cattle exports were banned from the UK in
1996. Five million cows had to be destroyed to eradicate BSE and the chances
of humans catching CJD.
Malarial parasites of the genus Plasmodium, which are carried
by Anopheles mosquitoes, have probably been responsible for half of all
human deaths (excluding wars and accidents) since the Stone Age.
Most Successful Parasitic Worm In Humans
Inhabiting the small intestine and measuring up to 45 cm (1ft 6 in)
in length, the large roundworm (Ascaris lumbricoides ) infects
approximately 25% of the human population. Victims are usually infected with
up to 20 worms. The simultaneous migration of large quantities of Ascaris
larvae through the lungs can cause severe haemorrhagic pneumonia. This
roundworm is the most ubiquitous parasite of humans with an estimated 1
billion people infected worldwide. Each female worm produces approximately
200,000 eggs per day with an estimated total of 27 million during its life
span. The eggs are highly resistant to all kinds of environmental
conditions, which contributes to its widespread distribution.
|Most Common Contagious Disease
The cold is caused by a group of rhinoviruses, of which there are at
least 180 types. The condition is almost universal, except for those living
in small isolated communities or in the frozen wastes of Antarctica.
Deadliest E.Coli Outbreak
Twenty people died, and 500 became ill, after consuming meat
contaminated by Escherichia Coli O157-H7. The meat was bought from a
butcherís shop in Wishaw, Scotland, in 1998. Escherichia Coli O157-H7 is a
dangerous strain of a normally harmless bacterium, which is believed to be
transmitted by food. Reports from the United States Centers for Disease
Control (CDC) estimate that 73,000 cases of infection and 61 deaths occur in
America each year from Escherichia coli 0157-H7. Infection can lead to
diarrhea and kidney failure. Most illness has been associated with eating
undercooked, contaminated ground beef.
the smallest parasitic animals are various unicellular, protozoan
parasites, some of which are only a few micrometers long. The smallest
of these is Pneumocystis carinii, which is only about 0.02 in long. It
inhabits the lungs and causes pneumonia in humans