A disease-producing agent, also known as a pathogen, refers to microorganisms or organisms that can cause illness in their hosts. This category includes bacteria, protozoans, fungi, viruses, and parasites, all of which can invade the body, multiply, and disrupt normal biological functions. Each type of pathogen has unique mechanisms of causing disease and can lead to a wide range of health issues, from mild infections to severe illnesses. Understanding these agents is crucial for disease prevention and treatment strategies.
Immunity
I wouldn't call bacteriophages parasites, but yes they are viruses which infect bacteria.
Pathogens. These are typically bacteria, viruses, fungi, or parasites that can cause disease by invading the body's tissues. Common examples include influenza viruses, E. coli bacteria, and malaria parasites.
Viruses differ from bacteria, fungi, and parasites in that they cannot reproduce independently; they require a host cell to replicate. While bacteria and fungi can divide and reproduce on their own through processes like binary fission or budding, viruses hijack the host's cellular machinery to produce new viral particles. Additionally, parasites are typically multicellular organisms that can reproduce sexually or asexually within or outside a host, whereas viruses are acellular and rely entirely on their host's biological processes for replication.
Bacteria such as cyanobacteria are able to carry out photosynthesis, while viruses lack the cellular machinery to perform photosynthesis. Viruses are obligate intracellular parasites that require a host cell to replicate and do not possess the cellular machinery needed for photosynthesis.
Viruses
bacteria,viruses,moeba,and paramesium
bacteria, viruses, fungi and parasites
The are microbes like bacteria, fungi, viruses, and protozoans
Immunity
Skin diseases can be caused by viruses, fungi, bacteria, or parasites.
Viruses are replication parasites that can do nothing until they take over a living cell. Bacteria are living cells.
bacteria. viruses. fungi. protozoa .(protists). parasites.
Tapeworms, fleas, leeches, and most viruses, and some bacteria all fall under the label of parasites. Parasites benefit from another organism at that organism's expense.
Prions, Viruses, Bacteria, Fungi, and Animal Parasites.
Bacteria, viruses, fungi, protozoa (aka protists), parasites.
"germs" -- bacteria, viruses, parasites, fungi, and possibly prions