what diseases do these viruses generally cause?
In small children it causes anything from rashes to to summer colds, to encephalitis, to blurred vision, to pericarditis.
Enterovirus
Enteroviruses can cause anything from rashes in small children, to summer colds, to encephalitis, to blurred vision, to pericarditis. 
which layer of meninges is affected in meningitis The three membranes - pia mater, arachnoid mater and dura mater can you tell me something about the first one mentioned above? It is the delicate innermost layer of the meninges, the membranes surrounding the brain and spinal cord. can you tell me something about the second layer mentioned? It is a derivative of the neural crest mesectoderm in the embryo. and the last layer? It is the outermost of the three layers of membrane called the meninges that protect the central nervous system. what are the causes for this disease? It is typically caused by an infection with microorganisms. what are the symptoms? Fever, headache, and neck stiffness. name some bacterial pathogens which cause this disease. Viral, fungal and parasitic name a few viral pathogens which causes this disease. Enteroviruses, herpes simplex virus and  varicella zoster virus. what parasitic agents can be responsible for this disease? "Angiostrongylus cantonensis", "Gnathostoma spinigerum", "Schistosoma" what tests are conducted to diagnose the disease? Blood tests like C-reactive protein, complete blood count. how can this be treated? Empiric antibiotics should be started immediately. you had mentioned the parasitic agents which cause that disease, can you tell me something about the first parasitic agent mentioned? It is a parasitic nematode (roundworm) that causes angiostrongyliasis, the most common cause of eosinophilic meningitis in Southeast Asia and the Pacific Basin. you had mentioned the viral pathogens which cause that disease, can you tell me something about the first viral pathogen mentioned? It is a genus of positive-sense single-stranded RNA viruses associated with several human and mammalian diseases. can you name a few viruses which come under this genus? EV-D68, EV-B69, EV-D70, EV-A71, etc.
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Enterovirus [SEP] Diseases caused by enterovirus infection
Enteroviruses cause a wide range of symptoms, and while their long list of signs and symptoms should put them on the differential diagnosis list of many illnesses, they often go unnoticed. Enteroviruses can cause anything from rashes in small children, to summer colds, to encephalitis, to blurred vision, to pericarditis. Enteroviral infections have a great range in presentation and seriousness. Non polio enteroviruses cause 10–15 million infections and tens of thousands of hospitalizations in the US each year. Enteroviruses can be identified through cell culture or PCR assay, collected from fecal or respiratory specimens. Below are common enterovirus related diseases, including poliomyelitis.