The most commonly identified bacteria in periodontal abscesses are anaerobic gram-negative rods, such as Bacteroides, Porphyromonas, Prevotella, Fusobacterium, and Treponema. These bacteria can cause inflammation and tissue destruction, leading to periodontal abscess. Other bacteria involved in periodontal abscesses include Aggregatibacter actinomycetemcomitans, Eikenella corrodens, and Capnocytophaga species. Treatment typically involves antibiotics and aggressive periodontal debridement, and may require surgical intervention. Additionally, good dental hygiene and regular professional dental care is essential in preventing periodontal abscess and other periodontal diseases.