We call this a pathogen. Path- means disease while -gen means to make.
By infected water , animal , infected blood , semen ,sexual,
In terms of Epidemiology a vector is an organism which transmits diseases to healthy organisms. A biological vector develops an infected organism in its body and passes it along to its host. e.g mosquito while a mechanical vector carry an infected organism to its host through its legs and other body parts. e.g flies.
comminicable diseases are those which spread from infected person to healthy one. there are millions of such diseases eg common cold, chicken pox, cough etc
Yes, they can get diseases from the diseases they haven't been vaccinated yet for, and they can also get a disease they've already been vaccinated for if they were due for another vaccination at the time they were infected. Even if they're healthy indoor cats they can still get diseases from outdoor cats but they might be less likely to get infected with a disease if they have a healthy body. Oh, and just so you know abortion stops a beating heart, so please support the awarness.
are infections and other diseases caused by organism that do not usually produce illness in healthy people with unimpaired immune systems.
No you should not treat an infected goldfish with healthy ones. The infected fish should be separated until it is healthy again and the remaining fish should be checked regally. Any medication you give an infected fish can harm any healthy fish.
Viruses are responsible for causing influenza. A medium (vector) is required to transmit the viruses from a sick person to a healthy person. this may be an insect, animal or human depending on the situation.
The AIDS virus (HIV) can be transmitted from an infected person to a healthy one, and a common way to transmit it is via sexual intercourse. Frequently changing sex partners will certainly increase your chances of getting infected. The risk can be reduced by the use of condoms.
No; a man can't get HIV from a healthy woman (by healthy I assume you mean HIV free). A woman (or man) can look healthy, but be infected with the virus.
If you are healthy you are less likely to get diseases, and if you have diseases you are not healthy because you have a disease.
scurvy
Robert koch showed that diseases can be transmitted by blood. he innoculated healthy mice with blood from a diseased mice and shows that the healthy mice became infected, with the causitive agent being the same microbe.he provided the proof that was needed to convince people that microscopic pathogens cause disease. His first experiments were with the disease anthrax in sheep. Later, he obtained similar results for tuberculosis and cholera.he developed new ways of isolating strains of bacteriaKoch was able to state a series of steps that are needed to identify the micro-organism responsible for a particular disease. These steps are called Koch's postulates.Step 1: All infected hosts must contain the suspect organism.Step 2: A pure culture of the suspect organism must be obtained.Step 3: A healthy organism infected with the pure culture must have the same symptoms as the original host.Step 4: The suspect organism must be isolated from the second host, grown in pure culture and prove to be identical to the first culture.Koch's postulates can be used to identify the causative organism of an infectious disease. The symptoms of the disease are carefully identified and then the blood of sufferers is examined to determine possible causative organisms.