"Multiple" Measures to Prevent Bird Flu

Today, I am afraid there is nothing more disturbing for Europeans than the bird flu that broke out in Russia more than half a month ago. Fortunately, the news agency of Russia's Novosibirsk State Department issued a news on August 8, saying that the bird flu epidemic in the state has already been initially controlled, and that other states and border areas where bird flu has occurred have not reported any further epidemic expansion. The nervous nerves of people seem to be finally able to get a moment of peace, but can these ups and downs of global outbreaks be effectively controlled and whether bird flu will spread in humans? The latest research results in the United States and the United Kingdom finally gave everybody hope. Scientists said that as long as the measures are properly implemented, the bird flu virus mutation will not cause a major human influenza outbreak. In recent years, the H5N1 bird flu virus has ravaged Asia. Thousands of birds, including poultry and wild birds, have either died or been killed. The virus also caused infections in humans, leading to 51 deaths in Vietnam, Thailand and Cambodia. In Southeast Asia and China, the H5N1 virus has caused a devastating impact on a large number of poultry farms in which more than 100 people have been infected with bird flu. So far, humans have been exposed to bird flu in birds infected with viruses. Scientists believe that the H5N1 virus is rapidly mutating. Once a strain that can be transmitted from person to person occurs, it may trigger a global The new influenza outbreak caused millions of deaths. Scientists from the United States and the United Kingdom have recently published their latest research findings on bird flu in the online editions of Nature and Science. Both scientists believe that governments must allocate antiviral drugs scientifically and take quarantine measures early. , and pay attention to the role of vaccination, so that it is possible to control the outbreak of new influenza. Taking the current bird flu outbreak in Russia as an example, some experts believe that next year migratory birds may bring back the bird flu virus. Therefore, there may be an outbreak of bird flu in these areas next year. In addition, experts are concerned that the H5N1 virus causing the bird flu outbreak in Russia may be transmitted by migratory birds to the Caspian Sea and the Black Sea, which may spread the outbreak. In response to this situation, in one of the studies, a team led by Neil M. Ferguson, a scientist at the Imperial College in London, simulated the bird flu found in the border areas of Thailand and neighboring Southeast Asian countries. Infected scene. In the computer model, researchers considered the effectiveness of antiviral drug treatment, social and geographic factors that affect drug distribution and efficacy, measures that the government may take to isolate and limit travel. Researchers in the "Nature" magazine pointed out that if you use a total of 3 million course of antiviral drugs, and the combined use of isolation and other means, you can basically control the spread of new influenza. If we can treat every infected person and their contact population, close local schools and workplaces, etc., the probability of controlling the spread of flu can reach 90%. After the outbreak of the bird flu epidemic in Russia, scientists worried that because there are a large number of poultry and birds used in the market to trade and lack a sound grass-roots management mechanism, Russia is unlikely to stop the bird flu virus from going west. Spreading, this means that bird flu is likely to appear in Europe. In view of the possibility of avian flu epidemic in densely populated areas, scientists at the Emory University in Atlanta, USA, Ailon Kini and others simulated a scenario of new influenza in a rural area of ​​500,000 people in Southeast Asia and considered the population in the local community. The flow conditions. The control measures they included included the distribution of antiviral drugs to the patient's social relations population; the immunization of even the vaccines for other types of influenza as soon as possible before the outbreak worsened; isolation of the patient's home and neighboring communities. According to data published in the "Science" online edition, if the public health agencies comprehensively use the above-mentioned prevention and control measures within two weeks after the first new influenza case is reported, the incidence rate can be controlled to about one thousandth. In addition, even if the vaccinated vaccine is not suitable for the new influenza, inoculation of half of the local population can greatly enhance the effectiveness of the prevention and control measures. Scientists pointed out that to control the outbreak of flu, it is necessary to adopt various measures in combination, and any single control measure is useless. Public health agencies must make more efforts. In particular, the storage and use of antiviral drugs is critical, and international cooperation is also essential.

Auto Chemistry Analyzer

The automatic biochemical analyzer is an instrument that measures a specific chemical composition in body fluids according to the principle of photoelectric colorimetry. Due to its fast measurement speed, high accuracy and small consumption of reagents, it has been widely used in hospitals, epidemic prevention stations and family planning service stations at all levels. The combined use can greatly improve the efficiency and benefits of routine biochemical testing.
principle
The automatic analyzer is to automatically run all or part of the steps of sampling, mixing, warm bath (37°C) detection, result calculation, judgment, display and printing results and cleaning in the original manual operation process. Today, biochemical tests are basically automated analysis, and there are fully automatic biochemical analysis systems designed for large or very large clinical laboratories and commercial laboratories, which can be arbitrarily configured according to the laboratory's testing volume.
Whether it is the fastest-running (9600Test/h) modular fully automatic biochemical analyzer today, or the original manual-operated photoelectric colorimeter for colorimetry, the principle is the use of absorption spectroscopy in spectroscopic technology. It is the most basic core of the biochemical instrument.
Optical system: is a key part of ACA. Older ACA systems used halogen tungsten lamps, lenses, color filters, and photocell assemblies. The optical part of the new ACA system has been greatly improved. ACA's beam splitting system can be divided into front splitting and rear splitting due to different light positions. The advanced optical components use a set of lenses between the light source and the cuvette to convert the original light source. The light projected by the lamp passes through the cuvette to bring the beam to the speed of light (unlike traditional wedge beams), so that the spot beam can pass through even the smallest cuvette. Compared with traditional methods, it can save reagent consumption by 40-60%. After the spot beam passes through the cuvette, the spot beam is restored to the original beam through this group of restoration lenses (wide difference correction system), and is divided into several fixed wavelengths (about 10 or more wavelengths) by the grating. The optical/digital signal direct conversion technology is used to directly convert the optical signal in the optical path into a digital signal. It completely eliminates the interference of electromagnetic waves to the signal and the attenuation in the process of signal transmission. At the same time, the optical fiber is used in the signal transmission process, so that the signal can achieve no attenuation, and the test accuracy is improved by nearly 100 times. The closed combination of the optical path system makes the optical path without any maintenance, and the light splitting is accurate and the service life is long.

Constant temperature system: Since the temperature of the biochemical reaction has a great influence on the reaction results, the sensitivity and accuracy of the constant temperature system directly affect the measurement results. The early biochemical instruments used the method of air bath, and later developed into a dry bath with constant temperature liquid circulation which combines the advantages of dry air bath and water bath. The principle is to design a constant temperature tank around the cuvette, and add a stable constant temperature liquid that is odorless, non-polluting, non-evaporating and non-deteriorating in the tank. The constant temperature liquid has a large capacity, good thermal stability and uniformity. The cuvette does not directly contact the constant temperature liquid, which overcomes the characteristics of the water bath type constant temperature being susceptible to pollution and the uneven and unstable air bath.

Sample reaction stirring technology and probe technology: The traditional reaction stirring technology adopts magnetic bead type and vortex stirring type. The current popular stirring technology is a stirring unit composed of multiple groups of stirring rods that imitate the manual cleaning process. When the first group of stirring rods is stirring the sample/reagent or mixed solution, the second group of stirring rods performs high-speed and high-efficiency cleaning at the same time. The set of stirring bars also undergoes a warm water washing and air drying process at the same time. In the design of a single stirring rod, a new type of spiral high-speed rotating stirring is adopted, and the rotation direction is opposite to the spiral direction, thereby increasing the stirring force, the stirred liquid does not foam, and reducing the scattering of light by microbubbles. Reagent and sample probes are based on the principle of early capacitive sensing, but slightly improved to increase the alarm of blood clots and protein clots, and re-test results according to the alarm level, reducing sample aspiration errors and improving the reliability of test results. . Large-scale biochemical instruments can detect more than 1,000 tests per hour, so automatic retesting is very important. Subjective evaluation of test results and manual retesting can no longer meet clinical needs.

Other aspects: barcode recognition of reagents and samples and computer login. Due to the lack of barcode recognition function of early biochemical instruments, there are more opportunities for errors. In recent years, both imported and domestic chemical instruments have adopted barcode detection. The use of this technology in biochemical instruments has provided technical support for the development of high-speed ACA, and also made the instrument quite supportive. The software development is simple and easy, therefore, barcode detection is the basis for the intelligence of the instrument. Open reagents, as an important factor for hospitals to choose models, whether the instrument supports open reagents is very important. After the reagents are opened, hospitals and scientific research units can choose their own reagent suppliers, and have a greater degree of freedom in measuring the price, the reliability of the test results, and the validity period of the reagents. Ion Selective Electrode Analysis Accessory (ISE), human serum and urine electrolyte indicators are very important, and hospitals can save money by adding ISE to the ACA system.

Bio Chemistry Analyzer, Clinical Chemistry Analyzer, Blood Chemistry Analyzer,Urine Chemistry Analyzer

Jilin Sinoscience Technology Co. LTD , https://www.jilinsinoscience.com