Ignorance
Ticks are often harmful to humans. For instance, the sheep tick could cause Lyme disease in humans.
There is not one "most harmful disease". In fact, there are lists of "harmful" diseases that can kill anyone at any time (example: kidney disease, heart disease), or can take years to kill.
It is unlikely, but in theory any animal might carry a disease that could be harmful to humans.
the most harmful disease in the world is cancer (it kills the most people).
Bees don't carry any diseases that are harmful to humans but they can carry diseases that are harmful to other bees.
The Tasmanian Devil Facial Tumour Disease (DFTD) poses no risk at all to humans or animals of any other species.
Under most circumstances, cows are not a danger to humans. However, eating contaminated beef can result in the spread of the deadly E. Coli Virus and Mad Cow Disease.
The word pathogenic means disease causing. So they can be harmful...but some pathogenic bacteria only are harmful to plants or dogs or cats, etc.
No, geckos are not harmful to humans. If anything, they are beneficial to humans because they eat insects
Plasmodium is harmful to humans because it is the organism responsible for causing malaria, a serious and sometimes fatal disease. The protist is transmitted to humans through the bites of infected mosquitoes, where it infects red blood cells and causes symptoms such as fever, fatigue, and organ damage. If left untreated, malaria can be life-threatening.
Cancer,AIDS
No, Halobacterium salinarum is not harmful to humans. It is a type of archaea that is commonly found in highly saline environments like salt flats and salt mines. It does not cause disease in humans and has even been studied for potential biotechnological applications.