Final answer:
Herpes simplex virus type 1 (HSV-1) is the virus that commonly occurs in periodontist pockets, leading to oral infections such as herpetic gingivostomatitis.
Step-by-step explanation:
In the context of periodontal disease, the type of virus that occurs with high prevalence in periodontist pockets is the herpes simplex virus type 1 (HSV-1). HSV-1 can lead to oral infections known as herpetic gingivostomatitis, which is characterized by lesions in the mouth and throat. As periodontal disease worsens, a variety of bacterial species may colonize the pockets, such as Porphyromonas, Streptococcus, and Actinomyces, potentially causing more severe conditions like acute necrotizing ulcerative gingivitis (trench mouth). However, in regard to viral occurrence, HSV-1 stands out due to its role in oral herpes infections that can also manifest within periodontal tissues. In addition, conditions such as pharyngitis and gingivostomatitis can involve HSV-1 in conjunction with other viruses such as adenovirus, Epstein-Barr virus, and cytomegalovirus.