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Bacteria and Viruses
Bacteria and Viruses

... begins to build up antibodies (an army) to fight the virus 3. The body’s immune system is able to build up the antibodies to fight the virus because the virus is not very strong. 4. The next time the virus in introduced into the body, the body recognizes the virus and already has the antibodies (arm ...
PRESS RELEASE CIC bioGUNE discovers a new form of virus
PRESS RELEASE CIC bioGUNE discovers a new form of virus

... acellular structures that depend on their ability to infect cells and transfer their genetic material in order to ensure their survival and propagation, as they are not able to reproduce on their own. They are basically composed of a genome (DNA or RNA) and a capsid, in other words, a protein struct ...
Hepatitis B virus: from immunobiology to
Hepatitis B virus: from immunobiology to

... effect on viral clearance and liver disease was observed when CD4 + T-cells were depleted at the peak of infection in the chimpanzee model. However, when CD4 + T-cells were depleted prior to infection, persistent infection evolved [9]. This indicates that CD4 + T-cells play a critical role in viral ...
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... replication in mucosal epithelium as a result of direct contact with infectious secretions from an infected individual. A high incidence of infection in the general population and accumulating evidence that hand-washing prevents acquisition of CMV from infants who shed high levels of virus in urine ...
A Novel and Quantitative Diagnostic Assay for Nucleic Acid
A Novel and Quantitative Diagnostic Assay for Nucleic Acid

... for detecting specific amplified sequences, including the use of labeled probes that hybridize to the sequence of interest. Our investigators have developed a rapid and sensitive assay using real-time PCR and molecular beacons to detect and measure the copy number of a specific nucleic acid sequence ...
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... VP24 - virus assembly, STAT1 inhibitor L - RNA-dependent RNA polymerase ...
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Objectives of hepatitis C surveillance

...  USA: Persons with chronic infection: 2.7 million  USA: Deaths from chronic disease/year:8,00010,000 Based on these numbers  NYS: Persons with chronic infection: 237,500 ...
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The Life of Viral Gastroenteritis

... Cause – Where does the virus come from? Scientists do not know how viruses were created and where they first came from. However, researchers have determined that different viruses tend to exist in some places more densely than in others. In adults, the great majority (around 90%) of gastroenteritis ...
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... A malicious use of the computer is to insert a computer virus into an email message as an attachment. When the recipient opens the attached file, the virus begins to do its damage. One type of virus finds all the addresses in the recipient’s email address book and sends a copy of the message to them ...
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... exposure and more severe infections will result in symptomatic presentations like flu-like symptoms that may persist for several weeks. Visceral infection can lead to the destruction of the adrenal gland. Infection of the central nervous system may appear as chronic meningitis or focal brain lesion( ...
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... features, ability to infect & severity of disease produced. 6. Carriers / Chronic Infections. Most bacteria are eradicated after treatment (typhoid and diphtheria). Bacteria that produce plague and anthrax are only present during active disease. Others can lead to dormant infections (agents of syphi ...
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Immunological Defence Mechanisms Against Biological

... pathogens (viruses), recombinant protein antigens, live, attenuated (less harmful) strains of pathogens (for instance cowpox virus to protect against smallpox …) Vaccines can be very effective: cases of smallpox (extinction of the disease: non more cases of smallpox exist on earth for the success of ...
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The Treatment of Dengue Hemorrhagic Fever

guidance guidelines - UNSW Research Gateway
guidance guidelines - UNSW Research Gateway

... Other factors that will affect the amount of virus remaining in the dish following a transduction protocol will also include the efficiency of the uptake of the virus. Accordingly a dish of cells transduced with 106 virus particles would in the best-case scenario (if the transduction has been set u ...
THE ANALYSIS OF A DISEASE-FREE EQUILIBRIUM OF HEPATITIS
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... Hepatitis B is an enormous challenge to global public health and it is caused by the hepatitis B virus (HBV). HBV can be transmitted by sexual contact, through the skin, by inoculation with contaminated blood or blood products, by transplantation of organs from infected donors, and perinatally from ...
STD Transmission Sign/Symptoms Health Consequences Testing
STD Transmission Sign/Symptoms Health Consequences Testing

... Transmission may occur through oral sex (penis in mouth) with an infected person Transmission may occur from mother to infant during birth. Gonorrhea bacteria is found in sexual fluids or discharge passed from an infected person to another by vaginal or anal sex Transmission through oral sex (penis ...
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Hepatitis B



Hepatitis B is an infectious disease caused by the hepatitis B virus (HBV) which affects the liver. It can cause both acute and chronic infections. Many people have no symptoms during the initial infection. Some develop a rapid onset of sickness with vomiting, yellowish skin, feeling tired, dark urine and abdominal pain. Often these symptoms last a few weeks and rarely does the initial infection result in death. It may take 30 to 180 days for symptoms to begin. In those who get infected around the time of birth 90% develop chronic hepatitis B while less than 10% of those infected after the age of five do. Most of those with chronic disease have no symptoms; however, cirrhosis and liver cancer may eventually develop. These complications results in the death of 15 to 25% of those with chronic disease.The virus is transmitted by exposure to infectious blood or body fluids. Infection around the time of birth or from contact with other people's blood during childhood is the most frequent method by which hepatitis B is acquired in areas where the disease is common. In areas where the disease is rare, intravenous drug use and sexual intercourse are the most frequent routes of infection. Other risk factors include working in healthcare, blood transfusions, dialysis, living with an infected person, travel in countries where the infection rate is high, and living in an institution. Tattooing and acupuncture led to a significant number of cases in the 1980s; however, this has become less common with improved sterility. The hepatitis B viruses cannot be spread by holding hands, sharing eating utensils, kissing, hugging, coughing, sneezing, or breastfeeding. The infection can be diagnosed 30 to 60 days after exposure. Diagnosis is typically by testing the blood for parts of the virus and for antibodies against the virus. It is one of five known hepatitis viruses: A, B, C, D, and E.The infection has been preventable by vaccination since 1982. Vaccination is recommended by the World Health Organization in the first day of life if possible. Two or three more doses are required at a later time for full effect. This vaccine works about 95% of the time. About 180 countries gave the vaccine as part of national programs as of 2006. It is also recommended that all blood be tested for hepatitis B before transfusion and condoms be used to prevent infection. During an initial infection, care is based on the symptoms that a person has. In those who develop chronic disease antiviral medication such as tenofovir or interferon maybe useful, however these drugs are expensive. Liver transplantation is sometimes used for cirrhosis.About a third of the world population has been infected at one point in their lives, including 240 million to 350 million who have chronic infections. Over 750,000 people die of hepatitis B each year. About 300,000 of these are due to liver cancer. The disease is now only common in East Asia and sub-Saharan Africa where between 5 and 10% of adults have chronic disease. Rates in Europe and North America are less than 1%. It was originally known as serum hepatitis. Research is looking to create foods that contain HBV vaccine. The disease may affect other great apes as well.
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