scholarly journals Structural aberration in R282K genetic mutation and antiviral drug-resistant H7N9 bird flu

2015 ◽  
Vol 6 (1) ◽  
pp. 34 ◽  
Author(s):  
Somsri Wiwanitkit ◽  
Viroj Wiwanitkit
Author(s):  
Timothy Feddersen ◽  
Jochen Gottschalk ◽  
Lars Peters

The spread of bird flu outside of Asia, particularly in Africa and Europe, topped headlines in 2006. The migration of wild birds brought the virus to Europe, where for the first time it spread to productive livestock, bringing it closer to the Western world. Due to today's globalized and highly interconnected world, the consequences of a potential bird flu pandemic are expected to be much more severe than those of the Spanish flu, which killed 50-100 million people between 1918 and 1921. A vaccine for the bird virus is currently not available. As of July 2006, 232 cases of human infection had been documented, mostly through direct contact with poultry. Of those, 134 people died. The best medication available to treat bird flu was Roche's antiviral drug Tamiflu. However, Tamiflu was not widely available; current orders of government bodies would not be fulfilled until the end of 2008. Well aware that today's avian flu might become a global pandemic comparable to the Spanish flu, Roche CEO Franz Humer had to decide how Roche should respond. While the pharmaceutical industry continued its research efforts on vaccines and medications, Tamiflu could play an important role by protecting healthcare workers and helping to contain the virus---or at least slow down its spread. Due to patent protection and a complicated production process with scarce raw ingredients, Roche had been the only producer of the drug. Partly in response to U.S. political pressure, in November 2005 Roche allowed Gilead to produce Tamiflu as well. Even so, it would take at least until late 2007 for Roche and Gilead to meet the orders of governments worldwide. The issue was a difficult one for Roche: What were the risks; what were the opportunities? If a pandemic occurred before sufficient stockpiles of Tamiflu had been built up, would Roche be held responsible? What steps, if any, should Roche take with respect to patent protection and production licensing in the shadow of a potential pandemic?Students will weigh the benefits of short-term profit maximization against the risks that a highly uncertain event could pose to a business and consider nonstandard approaches to mitigate these risks. Students will discuss the challenges of addressing low-probability, high-impact events; potential conflicts with the short-term view of the stock market and analyst community; and challenges of the patent protection model for drugs for life-threatening diseases.


2009 ◽  
Vol 15 (12) ◽  
pp. 1973-1976 ◽  
Author(s):  
Nila J. Dharan ◽  
Monica Patton ◽  
Alicia M. Siston ◽  
Julie Morita ◽  
Enrique Ramirez ◽  
...  

2020 ◽  
Vol 11 (12) ◽  
pp. 235-268
Author(s):  
Girija Vasudevan ◽  
Muthuraj M ◽  
Antony V samrot

Tuberculosis (TB) is an infectious disease caused predominantly by Mycobacterium tuberculosis. India accounts for one fourth of the global TB burden. Drug-resistant tuberculosis (TB) undermines control efforts and its burden is poorly understood in resource-limited settings. Drug resistant TB is a laboratory based diagnosis and is performed either by phenotypic drug susceptibility testing using solid/liquid culture or genotypic testing for detection of resistance by Line Probe Assay/Cartridge based Nucleic Acid Amplification tests.


2013 ◽  
Vol 194 (1-2) ◽  
pp. 154-160
Author(s):  
Toyohide Kobayashi ◽  
Jun Hirose ◽  
Hong Wu ◽  
Kouichi Sano ◽  
Takahiro Katsumata ◽  
...  

Hepatology ◽  
2008 ◽  
Vol 49 (5) ◽  
pp. 1483-1491 ◽  
Author(s):  
Saleem Kamili ◽  
Vitini Sozzi ◽  
Geoff Thompson ◽  
Katie Campbell ◽  
Christopher M. Walker ◽  
...  

1970 ◽  
Vol 8 (2) ◽  
pp. 17-22 ◽  
Author(s):  
CP Bhatt ◽  
AB Bhatt ◽  
B Shrestha

Introduction: Drug resistant tuberculosis is a signifi cant threat to tuberculosis control because only a few effective drugs are available against M. tuberculosis. The aims of this study were to compare multi drug resistant (MDR) strains of tuberculosis by phenotypic and genotypic method and determine type, location and frequency of rpoB and KatG gene mutations. Methodology: Anti-tuberculosis drugs susceptibility test of M. tuberculosis grown on Lowenstein Jensen medium was performed by proportion method. MDR cases were analyzed for mutation of rpoB and KatG genes. The regions of these genes were amplifi ed by polymerase chain reaction (PCR) and sequenced. Results: Two different mutations were identifi ed in rifampicin resistant strains. The most common point mutations were in codons TCG 531→TTG (85%) and GAC 516→TTC (15%) of the rpoB gene. Two different mutations in KatG gene were detected. The most common KatG point mutations were AGC 315 ACC (Ser→Thr) (85%) and CGG 463 CTG (Arg→Leu) (10%). In this study DNA sequencing analysis did not fi nd mutation on KatG gene of one of the strain tested. Male and female were equally affected by MDR tuberculosis and majorities (35%) of them were found in 21-30 years age group. Conclusion: The present investigation agrees that genetic mutation is responsible for change in phenotypic characteristics of M. Tuberculosis. DOI: http://dx.doi.org/10.3126/saarctb.v8i2.5896 SAARCTB 2011; 8(2): 17-22


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