Number of Bacteria in Saliva in the Perioperative Period and Factors Associated with Increased Numbers

Yuki Sakamoto, Arisa Tanabe, Makiko Moriyama, Yoshihiko Otsuka, Madoka Funahara, Sakiko Soutome, Masahiro Umeda and Yuka Kojima
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Yuki Sakamoto: Department of Dentistry and Oral Surgery, Kansai Medical University Medical Center, Osaka 5708507, Japan
Arisa Tanabe: Department of Dentistry and Oral Surgery, Kansai Medical University Medical Center, Osaka 5708507, Japan
Makiko Moriyama: Department of Dentistry and Oral Surgery, Kansai Medical University Medical Center, Osaka 5708507, Japan
Yoshihiko Otsuka: Park Dental Clinic, Kanagawa 2510025, Japan
Madoka Funahara: School of Oral Health Sciences, Kyusyu Dental University, Fukuoka 8038580, Japan
Sakiko Soutome: Department of Oral Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 8528102, Japan
Masahiro Umeda: Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical, Sciences, Nagasaki 8528102, Japan
Yuka Kojima: Department of Dentistry and Oral Surgery, Kansai Medical University Hospital, Osaka 5731191, Japan

IJERPH, 2022, vol. 19, issue 13, 1-9

Abstract: Perioperative oral management is performed to prevent postoperative complications, but its indication and management method are unclear. This study aimed to investigate salivary bacterial counts pre-and postoperatively, and factors related to increased bacterial count postoperatively. We included 121 patients who underwent surgery under general anesthesia and perioperative oral management. The bacterial count in saliva was determined preoperatively, and first and seventh days postoperatively using the dielectrophoresis and impedance measurement methods. The relationships between salivary bacterial count and various variables were analyzed using one-way analysis of variance, Spearman’s rank correlation coefficient, and multiple regression analysis. The salivary bacterial count increased significantly on the first day postoperatively but decreased on the seventh day. Multivariate analysis showed that age ( p = 0.004, standardized coefficient β = 0.283) and xerostomia ( p = 0.034, standardized coefficient β = 0.192) were significantly correlated with increased salivary bacterial count preoperatively. Salivary bacterial count on the day after surgery was significantly increased in patients with a large number of bacterial counts on the day before surgery after preoperative oral care ( p = 0.007, standardized coefficient β = 0.241) and postoperative fasting ( p = 0.001, standardized coefficient β = −0.329). Establishing good oral hygiene before surgery and decreasing salivary bacterial count are necessary in patients with a high risk of postoperative surgical site infection or pneumonia, especially in older adults or postoperative fasting.

Keywords: bacteria in saliva; infection; perioperative oral management; surgery (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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