Bird flu strikes in
another district in Bangladesh
DHAKA,
Jan 16: Bird flu has spread to another
district in Bangladesh, forcing authorities to
cull more than 1,500 birds, officials said today.
The H5N1 bird flu
virus was reported in backyard poultry in the
southern coastal district Barishal, a livestock
department official said.
''After the
confirmation of bird flu, authorities culled more
than 1,531 chickens, ducks and birds in a
one-kilometre area around the affected backyard
poultry,'' the official said.
Suspected
outbreaks were also reported at a farm in
northwestern Rajshahi district and another farm
in northern Rangpur district, where the virus has
been confirmed in fowl previously.
''The preliminary
tests showed some birds at the farm have died
from bird flu, but we still don't know whether it
is the deadly H5N1 strain,'' the official told
Reuters, referring to the farm in Rajshahi.
The H5N1 avian flu
virus was first reported near the capital in
March last year and has since spread mainly to
northern districts, forcing authorities to kill
more than 300,000 chickens.
With the latest
outbreak, 72 farms in 23 of Bangladesh's 64
districts have been infected with the deadly
virus.
There are around
150,000 poultry farms in Bangladesh, with an
annual turnover of 750 million dollars, officials
say.
So far there have
been no cases of human infection in the densely
populated country, government officials say.
Experts fear the
bird flu virus might mutate or combine with the
highly contagious seasonal influenza virus and
spark a pandemic that could kill millions of
people.
There have been
217 human deaths globally from the H5N1 strain
and 350 confirmed cases of infection since 2003,
World Health Organisation figures show.
(AGENCIES)
Long study led
to US cloned food safety decision........
WASHINGTON,
Jan 16: Cloned animals may often be born
deformed and die young but scientists, who have
looked at every aspect of their biology to try to
explain why, can find no evidence that it would
be dangerous to eat them.
None of the more
than 700 studies reviewed in detail showed any
evidence to suggest that milk or organ or muscle
tissue from cloned animals could harm someone who
ate it, the US Food and Drug Administration said
in its final report on the subject yesterday.
''We have actually
done a more in-depth analysis of the meat from
cloned animals than has been done ever,'' said
Mark Walton, president of Texas-based farm animal
cloning firm ViaGen.
In 2002, a
National Academy of Sciences panel said there was
no reason to believe that meat or milk from
cloned animals may be unsafe. But it said the FDA
should do a review, and because of the outpouring
of opinions and fears about the subject, the
agency extended its review for more than a year.
Cloned calves have
died from respiratory, digestive, circulatory,
nervous, muscular and skeletal abnormalities, as
well as because they had abnormal placentas, the
FDA noted.
And researchers
have looked at all the possible causes of these
abnormalities -- changes in the genes, in other
parts of DNA that affect what genes do and the
process of cloning itself.
They have looked
at whether the surviving animals have unusual
levels of hormones such as the stress hormone
cortisol or growth hormones. They have looked at
whether their milk contains altered levels of fat
or fatty acids, and they have fed animal products
from clones to mice and other animals to see if
there are any health effects.
TRICKING AN EGG
Animals are cloned
using somatic cell nuclear transfer -- a process
in which an egg cell is hollowed out and the
nucleus from an ordinary cell from the animal to
be copied is put inside. An electric or chemical
charge is used to start the egg growing and
dividing as if it had been fertilised by a sperm.
This process
itself can cause changes in the development of
the embryo, fetus and young animal. Not all the
same genes are turned on as are active during
normal sexual reproduction, studies have found.
But if the animal
survives more than a few months, it appears
normal in most ways, the studies indicate.
''As part of the
process of evaluating meat and milk from cloned
animals, we and USDA (the US Department of
Agriculture) looked at a group of cloned animals
and we looked at more components of muscle tissue
and of meat than normally is looked at,'' Walton
said in a telephone interview.
''This is one of
the most rigorous food safety reviews ever
conducted,'' added Dr Jerome Baker, chief
executive officer of the Federation of Animal
Science Societies.
As the FDA ruled
yesterday that food from cloned animals was safe,
the Agriculture Department asked the cloning
industry to extend a voluntary ban on marketing
food from the animals ban during a transition
period.
Even so, it is
unlikely that people would eat food directly from
a cloned animal -- they are more likely to be
used as breeding stock, with cloning used to
reproduce animals with desired characteristics,
animal cloners said.
And any sexually
produced offspring would be even more normal than
their parents, the FDA and the scientists agreed.
Margaret Mellon,
director of the Food and Environment Program at
the Union of Concerned Scientists and a critic of
the approval, agreed that the food itself was
unlikely to be dangerous.
''It seems to me
that the food safety risks are very remote,''
Mellon said in a telephone interview. ''The
question is how sure you have to be about the
safety of the technology when you are moving it
into society against a tidal wave of consumer as
well as trade concern.''
(AGENCIES)
At-home walking
regimen boosts fitness..........
NEW
YORK, Jan 16: An at-home, unsupervised exercise
program can improve fitness and well being,
Japanese researchers report.
Adults instructed
to walk aerobically for at least 20 minutes at
least twice a week and to increase the total
number of steps they walked daily showed
significant gains in stamina, vitality and mental
health after 32 weeks, Dr. Nozomi Okamoto of Nara
Medical University School of Medicine in
Kashihara and colleagues report.
While the health
benefits of exercise are clear, most studies
investigating these benefits have involved
supervised workouts, which can be costly and
inconvenient in real life, the researchers point
out. In the current study, published in the
International Journal of Sports Medicine, they
tested whether an at-home, unsupervised 32-week
programme would also be beneficial.
The researchers
randomly assigned 200 adults 42 to 75 years old
to the exercise group or to a control group. In
addition to walking, the exercisers were asked to
attend a two-hour exercise class every four
weeks.
At the end of the
program, people in the exercise group showed
significant improvements in a test of walking
stamina and another test that required them to
sit on a chair, stand, and sit again as many
times as possible for 30 seconds. Male exercisers
showed a greater increase in general and mental
health than their counterparts in the control
group, while women reported better physical
functioning, general health and vitality.
The benefits of
the programme were ''comparable'' to those that
would be seen with a standard supervised exercise
program, Okamoto and colleagues write.
''The present
method can be recommended as feasible for
application in the community because many
opportunities to perform home-based walking exist
in daily life,'' they conclude. (AGENCIES)
Don't panic over
heart drug news, US group advises ....
WASHINGTON,
Jan 16: News that the popular cholesterol
drug Vytorin may not work to protect arteries and
may in fact worsen clogging should not cause
patients to panic, the American College of
Cardiology said.
They said
yesterday the study -- which was carried on
newspaper front pages and which depressed the
shares of one of the makers, Schering-Plough --
was not the last word on the drug's efficacy.
Merck & Co and
Schering-Plough said on Monday that in a study
known as ENHANCE, Vytorin failed to significantly
halt clogging of arteries better than an older
generic drug.
Members of
Congress said they planned to investigate the
companies' handling of the study results, which
were delayed for what many people considered to
be a suspiciously long time.
In the meantime,
patients should not suddenly stop taking the
drug, the cardiology group said.
''There is no
reason for patients to panic,'' the ACC said in a
statement.
''This is not an
urgent situation and patients should never stop
taking any prescribed medications without first
discussing the issue with their health care
professional,'' the statement added.
Vytorin combines
two cholesterol-lowering drugs -- ezetimibe, sold
under the brand name Zetia, and simvastatin, sold
generically and under the Zocor brand name.
720 PATIENTS
The study involved
720 patients with very high levels of cholesterol
from an inherited form of heart disease. Doctors
made images of their arteries to see if the drugs
slowed the buildup of plaque, but the results
showed that Zocor alone in fact worked better
than Vytorin.
''According to the
American College of Cardiology, this study
deserves serious thought and follow-up,'' the
group said.
''The overall
incidence rates of cardiac events were nearly
identical between both treatment groups, and both
medicines were generally well tolerated.''
It said more
studies to be published later would shed more
light on the matter.
Michigan
Democratic Reps John Dingell, chairman of the
Committee on Energy and Commerce, and Bart
Stupak, chairman of the Subcommittee on Oversight
and Investigations, said they were investigating
the way Merck and Schering-Plough handled the
study.
''Additionally,
Merck and Schering-Plough's delay in releasing
study results, as well as their attempt to
manipulate the data is, quite frankly,
suspicious,'' Dingell said in a statement.
''American
consumers and their doctors should not have had
to wait nearly two years for this information.
Why did Merck and Schering-Plough go to great
lengths to delay the study results? Why did they
attempt to manipulate the data? We will continue
our investigation until these questions are
answered.'' (AGENCIES)
F-16 gets super
cruise capability..........
FORT
WORTH, TEXAS, Jan 16: As the deadline for
Indias biggest ever defence deal for
purchase of 126 new fighter planes nears, US
aviation giant Lockheed Martin today unveiled a
new upgraded version of its F-16 fighter planes
with super cruise capability and
Active Electronic Scanned Array (AESA) radars.
So far, the
super cruise capability is only seen
in 5th generation fighters F-22 Raptors and its
just unrolling F-35 joint strike fighters.
This capability
would impart the fighter with extended range, as
it can zoom from take-off to breaking the sound
barrier without the use of fuel guzzling
after-burners.
The export version
of the fighters, for the first time, has also
been equipped with AESA radars, as reportedly
specified in the Indian Air Forces USD
10-billion tender for the acquisition of 126
fighters.
Top company
official Chuck Artymovich told a group of Indian
newsmen that the AESA radar, which gives the
capability to simultaneously track and destroy
ground and air threats, has been cleared by the
US government for installation in 80 F-16s
ordered by the United Arab Emirates.
"We are
confident that similar green signal would be
given for installation of such radars in the case
of export to India also," he said.
Speaking while
unveiling an India-specific Fighting Falcons
(F-16 IN), the Lockheed Martin executive said
that the proposed fighter planes would also be
armed with infra-red search and track pods as
well as, counter-electronic warfare pods.
"The F-16 IN
is a complete new aircraft and totally caters to
Indias requirements and there could be no
comparison with Block 50 and 60 fighters, being
made for other countries," he said.
The US company
officials said that there were fair chances of
India increasing its fighter intake by 50 more
planes. Artymovichs comment assumes
significance, as the international tenders for
the deal are expected to be opened on March 2.
Besides the F-16,
other major contenders for the contract include
Boeings F-18, Eurofighter, Gripen of
Sweden, Rafale of France and Russias MIG
35.
At the ceremony,
Lockheed Martin executives said they had met all
requirements proposed in the Indian Request For
Proposals (RFP) without giving out any details of
the contents, citing confidentiality.
They said that the
company was prepared to meet the RFP requirements
of offsets, and would do so in the field of
aeronautics or for co-development of an Indian
Unmanned Aerial Vehicle (UAV).
Fighting Falcons
have proved to be the worlds largest
selling fighters with sales touching a figure of
4,300. It also holds a record of 400,000 hours of
combat flying and being the safest multi-role
fighter in the US history.
Asked why the
company did not offer its 5th generation fighter
F-35, Lockheed officials said that the deal
time-frame ruled out the possibility for the
same.
On the occasion,
Indian newsmen, were for the first time, shown
the futuristic joint strike fighter. (PTI)
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