Safety, reactogenicity, and immunogenicity of different doses of 10-valent Extraintestinal Pathogenic Escherichia Coli (ExPEC10V) bioconjugate vaccine (VAC52416) in healthy Japanese adults aged 60-85 years in a randomized, double-blind, phase 1 study.

Aim: This phase 1 study (NCT04306302) evaluated the safety, reactogenicity, and immunogenicity of ExPEC10V (VAC52416) in healthy Japanese adults.

Method: The randomized, double-blind, single-center study included 28-day screening, vaccination (Day 1), 30-day safety and immunogenicity follow-up and 181-day serious adverse events (SAEs) follow-up. Participants (60-85 years) were enrolled in dose-ascending approach and randomized to medium- and high-doses of ExPEC10V (n = 8 in each dose group) and placebo (n = 8).

A randomized phase 1/2a trial of ExPEC10V vaccine in adults with a history of UTI.

The safety, reactogenicity, and immunogenicity of 3 doses of ExPEC10V (VAC52416), a vaccine candidate to prevent invasive Escherichia coli disease, were assessed in a phase 1/2a study (NCT03819049). In Cohort 1, ExPEC10V was well tolerated; the high dose was selected as optimal and further characterized in Cohort 2. Cohort 2 comprised a maximum 28-day screening, vaccination (Day 1), double-blind 181-day follow-up, and open-label long-term follow-up until Year 1.

Safety, Reactogenicity, Immunogenicity, and Dose Selection of 10-Valent Extraintestinal Pathogenic Bioconjugate Vaccine (VAC52416) in Adults Aged 60-85 Years in a Randomized, Multicenter, Interventional, First-in-Human, Phase 1/2a Study.

Background: ExPEC10V is a bioconjugate vaccine containing O-antigen polysaccharides of 10 extraintestinal pathogenic (ExPEC) serotypes. This phase 1/2a study (NCT03819049) assessed the safety, reactogenicity, and immunogenicity of ExPEC10V (VAC52416) to prevent invasive disease in elderly adults.

Methods: The observer-blind, active-controlled design included a 28-day screening, vaccination, 181-day follow-up, and 1-year follow-up.

Colonization with ST131-30R (30R) Corresponds with Increased Serum Anti-O25 IgG Levels and Decreased TNFα and IL-10 Responsiveness to 30R.

An exceptional gut-colonizing ability may underlie the dramatic epidemiological success of the multidrug-resistant 30R subclone of sequence type 131 (O25b:K+:H4). In order to inform the development of colonization-preventing measures, we studied systemic immune correlates of 30R intestinal colonization. Human volunteers' fecal samples were screened for 30R by selective culture and PCR.

Vaccination With Detoxified Leukocidin AB Reduces Bacterial Load in a Staphylococcus aureus Minipig Deep Surgical Wound Infection Model.

Vaccines against Staphylococcus aureus have eluded researchers for >3 decades while the burden of staphylococcal diseases has increased. Early vaccine attempts mainly used rodents to characterize preclinical efficacy, and all subsequently failed in human clinical efficacy trials. More recently, leukocidin AB (LukAB) has gained interest as a vaccine antigen.