Meniere's Disease Support Group
Meniere's disease is a balance disorder of the inner ear. The symptoms of Meniere's are variable; not all sufferers experience the same symptoms. However, "classic Meniere's" is considered to comprise the following four symptoms: Periodic episodes of rotary vertigo, hearing loss, tinnitus, and a sensation of fullness or pressure in one or both ears.

http://www.menieresinfo.com
Hope this helps, I'm just starting to try and understand Meniere's too.
"Effectiveness of Acyclovir on Meniere's Syndrome III Observation of Clinical Symptoms in 301 cases," Mitsuo Shichinohe, M.D., Ph.D., The Sapporo Medical Journal, Vol. 68, No. 4-6, Cases of 301 MD patients treated with antiviral meds The results were: In 82.5% of cases diagnosed as Meniere's Disease, 85% of cases diagnosed as Meniere's Syndrome, and 89.1% of cases diagnosed as vestibular dysfunction, vertigo disappeared, and tinnitus and hearing were improved.
Department of Otolaryngology-Head and Neck Surgery, University of Massachusetts Medical School,
Morphological and clinical evidence supports a viral neuropathy in Mnire's disease (MD). Quantitative examination with transmission electron microscopy of vestibular ganglion cells excised from a patient with MD revealed viral particles enclosed in transport vesicles. Antiviral treatment controlled vertigo in 32 of 35 patients with MD (91%). PMID: 19142031 [PubMed - indexed for MEDLINE]