Infectious diseases and Infections
Infectious diseases are caused by microorganisms, such as bacteria, viruses and fungi. Many microorganisms live in our body and in our environment, in which most of them are advantageous such as bacteria found in our intestine is useful for food digestion and fungi used for foods such as mushrooms and yeast. However, in certain conditions these organisms can also cause illnesses.
Infectious diseases can be transmitted, directly or indirectly, from one person to another, directly this communication occurs through contact in which the infected person touches or exchanges body fluids with someone else. Sexually transmitted diseases like chlamydia, gonorrhoea are infectious diseases that spread through direct contact of body fluids. Indirectly some infectious diseases can be spread through airborne for example, you can catch measles easily because the virus can stay for up to two hours in the air anywhere the infected person coughed and sneezed. Furthermore, food contamination, waterborne (water contamination), vector like mosquitos and ticks are examples of indirect transmission of infectious diseases.
Bacterial, viral and fungal infections …show more content…
During lysogenic cycle the virus can stay inactive for a long period of time inside host cells, though it replicates in virus genes being transmitted to daughter cells of the host. In lytic cycle when the virus enters the host cell then infuses the cell with its genetic material and generates millions of copies of new infected viruses. Chickenpox is one example of viral infection and is caused by varicella-zoster virus. It is a highly contagious viral infection which is common in children. The disease causes red itchy spots that turn quickly into blisters and they spread rapidly within short period of time from infected person through direct contact as well as indirect contact through cough and
Infectious diseases are caused by microorganisms, such as bacteria, viruses and fungi. Many microorganisms live in our body and in our environment, in which most of them are advantageous such as bacteria found in our intestine is useful for food digestion and fungi used for foods such as mushrooms and yeast. However, in certain conditions these organisms can also cause illnesses.
Infectious diseases can be transmitted, directly or indirectly, from one person to another, directly this communication occurs through contact in which the infected person touches or exchanges body fluids with someone else. Sexually transmitted diseases like chlamydia, gonorrhoea are infectious diseases that spread through direct contact of body fluids. Indirectly some infectious diseases can be spread through airborne for example, you can catch measles easily because the virus can stay for up to two hours in the air anywhere the infected person coughed and sneezed. Furthermore, food contamination, waterborne (water contamination), vector like mosquitos and ticks are examples of indirect transmission of infectious diseases.
Bacterial, viral and fungal infections …show more content…
During lysogenic cycle the virus can stay inactive for a long period of time inside host cells, though it replicates in virus genes being transmitted to daughter cells of the host. In lytic cycle when the virus enters the host cell then infuses the cell with its genetic material and generates millions of copies of new infected viruses. Chickenpox is one example of viral infection and is caused by varicella-zoster virus. It is a highly contagious viral infection which is common in children. The disease causes red itchy spots that turn quickly into blisters and they spread rapidly within short period of time from infected person through direct contact as well as indirect contact through cough and