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Antibiotics Overuse Means Superbugs are On the March

Antibiotics Overuse Means Superbugs are On the March

New report tracks users in 69 countries, results are discouraging



As has long been feared, antibiotic use is driving antibiotic resistance and creating what critics have said could be a plague of virtually uncontrollable superbugs for a wide range of diseases including syphilis, gonorrhea and tuberculosis as doctor overprescribe, and, to raise meat production, livestock producers fill their animals with antibiotics to make them mature faster. 


                By Shobha Shukla             Headline, Hong Kong, Society



New data released this week by the Center for Disease Dynamics, Economics & Policy via its Resistance Map, an interactive online tool that allows users to track the latest global trends in drug resistance in 39 countries, and antibiotic use in 69 countries.


The center issued the first-ever report on The State of the World’s Antibiotics, 2015, looking at the current state of global antibiotic use, and documents alarming rates of bacteria resistant to last-resort antibiotics that can lead to life-threatening infections across the world.


Key Findings


Cause of antibiotic resistance: The greater the volume of antibiotics used, the greater the chances that antibiotic-resistant populations of bacteria will prevail in the contest for survival of the fittest.


Two trends are contributing to a global scale-up in antibiotic consumption: (i) rising incomes are increasing access to antibiotics, which is saving lives but also increasing use, both appropriate and inappropriate, which in turn is driving resistance; and (ii) increasing demand for animal protein and resulting intensification of food animal production is leading to greater use of antibiotics in agriculture, and hence increasing resistance.


Trends in antibiotic use:


Both human and animal antibiotic use is rising dramatically in low and middle-income countries, particularly China, India, Brazil and South Africa.


This increase, driven by increased prosperity, includes a great deal of unnecessary and irrational use and poses a major threat to public health.


In many countries, like India, antibiotics can easily be purchased over the counter without prescription.


Human consumption: Between 2000 and 2010, total global antibiotic consumption grew by more than 30 percent –from approximately 50 billion to 70 billion standard units, based on data from 71 countries.


Even though per capita consumption is still higher in high-income countries, the greatest increase in antibiotic use between 2000 and 2010 was in low and middle-income countries, where use continues to rise.



The countries consuming the most antibiotics overall in 2010 were India, 13 billion standard units, China 10 billion, and the United States, 7 billion units.


However, in per capita terms among these countries, the United States led in 2010 with 22 standard unitds per person, compared with 11 in India and 7 in China.


In most countries, about 20 percent of antibiotics are used in hospitals/healthcare facilities, and 80 percent are used in the community, either prescribed by healthcare providers or purchased directly by consumers without prescription.


Perhaps half of community use is inappropriate, for minor ailments that will not benefit from treatment, but add to the burden of antibiotic resistance.


Hospitals generate some of the most dangerous and difficult-to-treat infections, a result of heavy use of antibiotics (especially in LMICs, where antibiotics may substitute for infection control).


In hospitals, seven times more antibiotics are used when they are given post- rather than pre-surgery.


This not only increases costs but also contributes to the potential for antibiotic resistance.


Even when antibiotics are administered before surgery, the regimen or duration of the therapy may be suboptimal: from 19 percent to 86 percent of patients in hospitals in India received inappropriate antibiotic prophylaxis.


Agricultural/Livestock consumption:


As global demand for animal protein grows, antibiotics are increasingly used to raise food-producing animals in intensive production—mostly to promote growth, rather than treat disease.


The result is an increasing prevalence of antibiotic-resistant bacteria in livestock, poultry, and aquaculture.


Also many farmers are transitioning to intensive agriculture and often use antibiotics to optimize production.( NOT IN THE UK WHERE ANTIBIOTICS USE IS CONTROLLED BY A VETERINARIAN )


More antibiotics are used in poultry, swine, and cattle to promote growth and prevent disease than are used by the entire human population.


Globally, livestock consumed at least 63,200 tonnes of antibiotics in 2010, accounting for nearly 66 percent of the estimated 100,000 tonnes of antibiotics produced annually worldwide, which is projected to rise to 105.600 tonnes by 2030.


In 2010, China was estimated to consume the most antibiotics in livestock, followed by the United States, Brazil, Germany, India, Spain, Russia, Mexico, France and Canada.


Animal antibiotic use provides no health benefits to the animals but accelerates antibiotic resistance.


Recent analyses suggest that growth promoters have a smaller effect on animal growth than assumed.


The countries with the greatest expected increases in food demand and animal antibiotic use currently have the least efficient farming systems.


Emphasis should be on improving productivity without antibiotic growth promoters.


Trends in antibiotic resistance


The most recent worldwide estimates of global antibiotic resistance, published by the World Health Organization in 2014, list Klebsiella pneumoniae, Escherichia coli, and Staphylococcus aureus as the three agents of greatest concern, associated with both hospital- and community-acquired infections.


In 2014 in India, 57 percent of the infections caused by Klebsiella pneumoniae, a dangerous superbug found in hospitals, were found to be resistant to the last-resort antibiotic class of drugs carbapenems, up from 29 percent in 2008.


It was more than 60 percent resistant for four of five drug classes tested.


This is a dangerous trend as the Klebsiella bug is around 80 percent resistant to the drug class 3rd generation cephalosporins, 73 percent resistant to fluoroquinolones, and 63 percent to aminoglycosides.


For comparison, these drugs are still effective against Klebsiella infections in 90 percent of cases in the US and over 95 percent of cases in Europe.



India also has the highest rates E.coli resistance with strains more than 80 percent resistant to three different drug classes, thus increasingly limiting treatment options.


E.coli resistance is also high and rising for many drug types in other regions too. In Europe, North America, South and Southeast Asia and parts of Africa, resistance to aminopenicillins—a broad-spectrum antibiotic class—is around 50 percent.


Incidence of methicillin-resistant Staphylococcus aureus, a highly dangerous type of resistant pathogen contracted mostly in hospitals, has declined in Europe, the US, Canada and South Africa during the past eight years.


However it is rising in sub-Saharan Africa, India, Latin America, and Australia and was recorded at 47 percent in India in 2014, and 90 percent in Latin American hospitals in 2013.


The way forward


The Center for Disease Dynamics, Economics & Policy report stresses that antibiotic stewardship – reducing the inappropriate and unnecessary use of antibiotics – is key to controlling antibiotic resistance.


It lays out six strategies that should be incorporated in national antibiotic policies to halt its spread:


(i) Reduce antibiotic need through improved water, sanitation and immunization;


(ii) Improve hospital infection control;


(iii) Dis-incentivize antibiotic overuse/misuse and incentivize antibiotic stewardship;


(iv) Reduce and phase out subtherapeutic antibiotic use in agriculture;


(v) Educate health professionals, policy makers and the public on sustainable antibiotic use;


and (vi) Ensure political commitment to meet the threat of antibiotic resistance.


The center’s report advises that limiting overuse and misuse of antibiotics are the only sustainable solutions.



“A rampant rise in antibiotic use poses a major threat to public health.


We need to focus 80 percent of our global resources on stewardship and no more than 20 percent on drug development.


No matter how many new drugs come out, if we continue to misuse them they might as well have never been discovered,” said Ramanan Laxminarayan, the director of the center and the co-author of the report.


One major drawback to focusing on drug development as a solution is that new antibiotics are significantly more expensive than those currently available—and hence unaffordable for most people in low and middle-income countries.


“When it comes to antibiotic-resistant infections, the rich pay with their wallets and the poor pay with their lives,” Laxminarayan said.


There is still hope to conserve antibiotic effectiveness for future generations.


In May 2015, the World Health Assembly has endorsed the Global Action Plan on Antimicrobial Resistance, which calls on all countries to adopt national strategies within two years.


The new report, observers say, could help countries take coordinated and research-backed action to alleviate the problem.



Instead of being the default treatment for mild ailments—like coughs, colds, and uncomplicated diarrhea— antibiotics must be treated as precious life-saving medicines, to be used rationally under medical supervision when needed.

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