Réjean Dion's research while affiliated with Institut National de Santé Publique du Québec (INSPQ) and other places

... OPEN determine whether rising COVID-19 infections are driven by one or more super spreader events (e.g., large social gatherings or conferences), congregate living accommodations (e.g., dormitories or care homes), new introductions from outside sources (e.g., due to holiday travel), introduction of a new variant with increased infectivity (e.g., the Omicron variant), or other factors [17][18][19][20][21][22] . For IHEs, this information can be used to identify risk factors for increased transmission throughout the academic year, and to help develop effective mitigation measures for future outbreaks of COVID-19 or other pathogens with similar transmission mechanisms. ...

... are predominantly responsible for infecting humans (2)(3)(4), but other species have also been identified in human specimens (1,2). ...

... Thirty-four outbreaks of clinical toxoplasmosis in humans have been documented throughout the past 50 years [4]. In immunocompetent people, symptoms are minimal and mimic the flu [4][5][6]. On the other hand, toxoplasmosis is considered as a serious condition among those with compromised immune systems [2]. In both HIV-positive and non-HIV immunocompromised individuals, the most frequent clinical symptom caused by T. gondii infection is toxoplasmic encephalitis (TE) [2]. ...

... The viremic prevalence in Canada was estimated to be 0.6% (0.4-0.7) in 2015 (22), as shown in Figure 1 and Table 1. From 2012 to 2018, there was a decline from 1% to 0.6% in viral prevalence due to the introduction of public health insurance and treatment initiation with DAAs in Canada (22,23,24). ...

... Phylogenetic trees were built using the maximum likelihood analysis and employing a general time-reversible (GRT) substitution model implemented using the Molecular Evolution Genetic Analysis (MEGA) software v. 10 [20]. Sequences were associated with a particular cluster if the nucleotides differed by less than 3% and the bootstrap support value was greater than 70% [21]. Monophyletic clusters and phylogenetic trees were derived from sequences that clustered using the maximum likelihood method. ...

... People with a TST result of at least 5 mm or who had a history of LTBI or active TB underwent chest radiography. 15 The NRBHSS worked with local staff as well as staff flown in to the villages to organize these screening campaigns. Additional details are provided in the Screening campaigns section of Appendix 1, available at www.cmaj.ca/lookup/ ...

... Generally, Campylobacter resides in the intestine of warm-blooded animals, transmitting it to humans through contaminated food items [6]. Campylobacter species, including C. coli, C. jejuni, and C. fetus are commonly residing in the intestinal contents of bovine, their bile, gallbladder, bile ducts and liver [7]. Campylobacter jejuni is thermophile in nature, maximum growth at 42°C in 3-15% of oxygen and a CO2 concentration of 2-10%. ...

... Recently, outer membrane vesicle (OMV) vaccines against capsular group B Neisseria meningitidis (MenB) was shown to crossprotect against N. gonorrhoeae. This finding suggests that it is possible to induce protection against gonococcus, reigniting efforts to develop a specific vaccine for gonorrhea (10)(11)(12). Further investigation is needed as both the antigens involved and the immune mechanisms of protection are unclear. ...

... Moreover, the predominant ST 338 and ST 336 were found both in hotels and in residential buildings. Several STs identified in our study have been associated with LD outbreaks and sporadic cases in other countries [55,56]. In addition, we did not find differences between the STs found in buildings with and without LD cases, and all these findings consequently suggest that Legionella strains may persist in residential buildings in Latvia and pose a long-term risk to residents. ...

... According to a previous study, the Ib subtype family was the most frequent in North America, followed by Ia, Id, and Ie 22 . However, in these studies, subtype IeA11G3T3, an Ie subtype family member, was the second most frequently reported 16,25,26 . Considering the number of different members of each subtype family, the Id subtype family, with 14 different subtypes, was also reported 16,25,26 . ...