Anti Viral
Anti Viral
Viruses are the smallest infectious agent consisting of nucleic acids like RNA or DNA enclosed in a protein coat or capsid. They are too small to be seen with a standard light microscope. It is an obligate parasite, which means they penetrate the host cells and program the cell to assemble new virus particles. They are also sometimes called hijackers; they invade the normal living cell and use those cells to multiply and produce more viruses like themselves. The pathogenic viruses may infect the body through various routes such as respiratory tract, ingestion, insect and animal bites, and finally, transmitted through sexual activities.
There are prescription medicines called antiviral drugs that can be given to treat viral infections and flu illnesses. The treatment recommends people who have flu or suspected flu and are more likely to get serious flu complications such as diabetes, asthma, or heart disease. Antiviral drugs are prescription medicines available in pills, liquid, inhaled powder, or intravenous solutions that fight off the viruses in the body. Antiviral medications are different from antibiotics, which fight against bacterial infections. Check with your doctor if you develop flu symptoms. Symptoms include runny or stuffy nose, fever, sore throat, body aches, chills, and fatigue. These antiviral medications work best when started soon after flu illness begins. They can lessen fever and other flu symptoms and shorten your sick time by about one day. Antivirals also cause a significant reduction in the risk of serious flu complications. Early treatment can mean a milder illness instead of a more severe illness that may require hospitalization. According to experts, flu antiviral drugs work best when they start within two days of getting sick. However, starting treatment can still be beneficial, especially if the sick person is at increased risk of developing serious flu complications or getting hospitalized with more severe illnesses. Follow instructions for taking these antiviral drugs.
Viral infection and its symptoms:
Viral infections are caused due to the presence of a virus particle inside the host body. The word virus itself is taken from Latin, meaning toxin or poison.
With a viral infection, we usually associate high and long-lasting fever, but some other symptoms can also be noticed like:
• Fatigue
• Headache
• Sneezing
Depending on the virus:
• Coughing
• Diarrheal
• Abdomen pain
• Sore throat
• Rashes
Transmission of the viral particles:
There are various routes of transmitting the virus into the body, but the most common is through droplet contact when someone sneezes or coughs. The virus remains suspended in the droplets and may enter the respiratory tract. There are a variety of other modes also:
• Fecal-oral: due to improper washing of hands leading to spread of disease.
• Vector-borne or direct contact includes touching common objects like a telephone booth.
• Sexual contact: One of the most common modes of transmission of viral infection.
• Blood transfusion: By use of shared needles/syringes
• Saliva
• Breast milk
• Bodily fluids
Common diseases caused by a virus:
• Common Cold: It’s the most common illness known worldwide. The usual signs are stuffy or runny nose, sore throat, and sneezing. It can be easily recognized as the condition is so ordinary. Common cold targets the upper respiratory tract. The viruses that cause the common cold can spread from person to person or from one surface to another
• Influenza virus: also called flu, is a respiratory infection caused by several flu viruses. The flu and cold symptoms are usually the same, but a few differences like high temperature and extreme body aches associated with flu separate them.
• Chickenpox: It is a highly contagious disease. The major symptoms are rashes blisters that break open. The disease is often accompanied by high fever, fatigue and loss of appetite.
• HPV: Human Papilloma Virus, this causes warts of all types. This virus is transmitted through sexual contact in males and females. The percentage is so high that 50% of men and women get it at some point in their life. It is also involved in causing cervical cancer.
Other diseases like Herpes, AIDS, Meningitis, Measles, Mumps, Polio, and Rabies are all caused due to viruses.
Diagnosis: Generally, the history of severe muscle and joint pain before fever and the presence of skin rashes and lymph gland swelling helps the physician to determine the presence of viral infection. The various laboratory tests clarify whether the symptoms are due to a virus or a bacterial infection. These tests include:
• ELISA
• Hemagglutination assay
• Cell culture
• Antibody detection
• Nucleic acid detection
• Visual inspection
• Histology (post-mortem)
Treatment:
Viruses have a self-limited life, so the treatment is usually done to reduce the symptoms. Anti-pyretic and analgesic drugs are commonly used. Antiviral drugs are a class of medication used specifically for treating viral infections. They are used to ease symptoms and shorten how long you are sick with viral infections. To get an idea, you can have a look at the disease and the treatment given for that disease below:
|
S.No |
Disease |
Treatment |
|
1 |
Hepatitis |
Adefovir, Lamivudine |
|
2 |
HSV-1,2 |
Acyclovir |
|
3 |
Encephalitis |
Acyclovir |
|
4 |
Aseptic-Meningitis |
Cidofovir |
|
5 |
AIDS |
Zidovudine |
|
6 |
Influenza |
Amantadine, Ribavirin |
|
7 |
Pneumonia |
Ribavirin (Aerosol) |
|
8 |
Chicken Pox |
Acyclovir, valacyclovir |
|
9 |
Retinitis |
Cidofovir, Gancyclovir |
These antiviral drugs do not directly destroy the virus but work by preventing the infection process. Your treatment may differ from the one mentioned on this category page.
Precautions and Preventions:
The following points must be kept in mind to keep oneself away from the viral infection and also avoid the spreading of the disease:
• One should try covering the mouth when coughing/sneezing with a cloth or hands.
• Proper washing of hands after touching a publically used object
• Avoiding close contact with the sick person may help you stay away from the infection.
• Avoiding contaminated food/water.
• Improved sanitation
• Avoiding shared needles/syringes for blood transfusion or drug delivery.
• Practising safe sex can help avoid STDs.