Get 65% Discount on Preventive Health Checkup
Career in India        

MHT-CET : Biology Entrance Exam

MHT - CET : Biology - Human Diseases and their Control Know More

Top of Form

Other Forms of Hepatitis

1.      Non-A Non-B type:

         It is caused by a DNA virus sometimes called as HCV.

         The main mode of transmission is through contaminated blood.

         The incubation period of the virus 4-5 weeks.

2.      Hepatitis D (Delta Hepatitis):

         It is caused by a RNA virus called as HDV.

         This delta virus does not cause infection by itself.

         It causes infection in combination with hepatitis B virus as delta virus can replicate only in the presence of B virus.

         When they are together, they form an acute form of hepatitis called Delta hepatitis.

         The mode of transmission of this virus is same as HBV.

Hepatitis B:

  • Hepatitis B virus is present in the blood of patients who have recovered from the disease.
  • These people are known as carriers.
  • The virus may be present in the body fluids of such patients such as sweat, saliva, milk, blood, etc.
  • Thus they transmit the disease even though they have recovered.

Initial Symptoms of Leprosy:

  • In the initial stages, pink or colourless patches appear on the skin.
  • There is partial or total loss of sensation at the affected parts.
  • Small nodules appear on the face and all over the skin.
  • The peripheral nerves get thickened.
  • The skin also becomes thick, especially the ear lobes.
  • There may be loss of eyelashes and eyebrows.

Advanced Stages of Leprosy Show the Following Symptoms:

  • The nodules rapture and bacilli are released through the wounds.
  • Deformities of toes and fingers occur.
  • Nasal depression may occur.
  • In some cases blindness and paralysis can also occur.

Characteristics of Cancer-producing Cells:

  • The cell that develops into cancer is called a stem cell.
  • It possesses active oncogenes.
  • Oncogenes are cancer-causing genes that are present in the human body cells but in an inactive form.
  • The stem cell undergoes uncontrolled cell divisions and produces a mass of cancerous cell called tumor.
  • Cancer cells are abnormal and lack biological inhibitions.
  • They do not undergo differentiation.
  • They exhibit the phenomenon of metastasis.

Preliminary Diagnostic Procedures for Cancer:

  • A bronchoscope is used for the detecting lung cancer.
  • It includes viewing of network of airways by the doctor through the instrument.
  • A mammogram can detect breast cancer at an early stage, i.e. before any lump can be felt.
  • A pap test is performed to detect cervical cancer.
  • A cervical smear is taken and examined in this test.
  • A prostate specific antigen test (PSA test) is done to detect prostate cancer in early stages.

Confirmatory Test for Cancer:

  • Biopsy is the confirmatory test (C.T.) for cancer.
  • In this test, a small piece of tissue is removed from the tumor.
  • This tissue may be frozen immediately and sliced into thin sections.
  • The pathologists examine this tissue under a microscope to determine whether the tumor is benign or cancerous (malignant).

Acquired Immuno-Deficiency Syndrome (AIDS):

  • AIDS is caused by Human Immuno-Deficiency Virus (HIV).
  • AIDS is the most serious stage of HIV disease.
  • HIV virus attacks the immune system and makes the body susceptible to a number of life-threatening infections.

Transmission of Virus:

1.      Through sexual contact including oral, anal and vaginal sex.

2.      Through blood transfusion.

3.      From a pregnant women to her foetus.

4.      The infection is not transmitted by casual social contact with the infected person such as by shaking hands, hugging or touching, etc.

Bottom of Form

 


Career in India | Jobs in India
© All Rights Reserved, indicareer.com | partners | Sitemap