can they transfer any diseases to humans?
Yes, they can be infected or infested with viruses, bacteria, fungus, protozoans, arthropods or worms that can transmit diseases to humans.
Cat
Cats can be infected or infested with viruses, bacteria, fungus, protozoans, arthropods or worms that can transmit diseases to humans. 
where did the term 9 lives come from It is a myth in many cultures, cats have multiple lives as they exhibit the natural suppleness and swiftness to escape life-threatening situations. how are they classified? The domestic cat is regarded as a distinct species, "Felis catus". can they see in darkness? Yes, they have excellent night vision. what helps them do so? This is partly the result of cat eyes having a tapetum lucidum. what is it? It is a layer of tissue in the eye of many vertebrates. is it used by humans? Humans use scanning for reflected eyeshine to detect and identify the species of animals in the dark, and deploying trained search dogs and search horses at night. is there any artificial form of it? Yes, manufactured retroreflectors modeled after a tapetum lucidum are described in numerous patents and today have many uses. what are their uses on road? When the headlights of a car illuminate a retroreflective surface, the reflected light is directed towards the car and its driver. does it have any uses in sea transports? Yes, retroflective tape is used. has it been used on any other planet? Yes, on Mars. what was its use there? A similar device, the Laser Retroreflector Array (LaRA), has been incorporated in the Mars "Perseverance" rover. what are the superstitions associated with the animal discussed above? One of them is that a black cat "crossing one's path" leads to bad luck.
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Cat [SEP] Infections transmitted from cats to humans
Cats can be infected or infested with viruses, bacteria, fungus, protozoans, arthropods or worms that can transmit diseases to humans. In some cases, the cat exhibits no symptoms of the disease, However, the same disease can then become evident in a human. The likelihood that a person will become diseased depends on the age and immune status of the person. Humans who have cats living in their home or in close association are more likely to become infected, however, those who do not keep cats as pets might also acquire infections from cat feces and parasites exiting the cat's body.