Severity of infection and seasonal variation of non-typhoid <i>Salmonella</i> occurrence in humans

Gradel, Kim Oren; Dethlefsen, Claus; Schønheyder, Henrik Carl; Ejlertsen, Tove; Sørensen, Henrik Toft; Thomsen, Reimar Wernich; Nielsen, Henrik

doi:10.1017/s0950268806006686

Cited by 24 publications

(18 citation statements)

References 22 publications

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“…The KauffmanneWhite scheme was used for serotyping of Salmonella. 26,27 Campylobacter was confirmed by microscopy and a positive oxidase and catalase reaction and identified as Campylobacter jejuni/coli, without differentiation between these two species.…”

Section: Charlson Comorbidity Indexmentioning

confidence: 99%

Morbidity and mortality of elderly patients with zoonotic Salmonella and Campylobacter: A population-based study

Gradel

Schønheyder

Dethlefsen

et al. 2008

Journal of Infection

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Section: Charlson Comorbidity Indexmentioning

confidence: 99%

Morbidity and mortality of elderly patients with zoonotic Salmonella and Campylobacter: A population-based study

Gradel

Schønheyder

Dethlefsen

et al. 2008

Journal of Infection

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“…We have previously shown that the typical seasonal variation of Salmonella infections with peaks occurring in August diminishes with increasing frailty in patient groups (Gradel et al, 2007); thus, the lack of difference in seasonal variation corroborates the minor role of host characteristics. On the other hand, this lack of difference is difficult to interpret in relation to exposure factors.…”

Section: Resultsmentioning

confidence: 55%

“…Categorical variables for Salmonella=Campylobacter coinfected, Salmonella monoinfected, and Campylobacter monoinfected patients were cross-tabulated and compared by odds ratios (OR) with 95% exact confidence intervals (CI), or, in case of zero counts, with 95% Cornfield CI. We assessed seasonal variation for the three groups as described previously (Gradel et al, 2007). In brief, we computed peakto-trough (PTT) ratios (i.e., the estimated incidence in the month of the peak divided by the 252 GRADEL ET AL.…”

Section: Statistical Analysesmentioning

confidence: 99%

Are Host Characteristics or Exposure Factors Mainly Involved in the Acquisition of ZoonoticSalmonellaandCampylobacterCoinfection in Humans?

Gradel

Schønheyder

Kristensen

et al. 2009

Foodborne Pathogens and Disease

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We hypothesized that patients coinfected with zoonotic Salmonella and Campylobacter were frailer than monoinfected Salmonella or Campylobacter patients. The study cohort included all first-time Salmonella/Campylobacter infections in Aarhus and North Jutland counties, Denmark, from 1991 through 2003. Data on comorbidity, hospitalization in relation to the Salmonella/Campylobacter infection, and 1-year mortality were obtained from electronic registries. Among 13,449 individuals, 114 (0.85%) had Salmonella/Campylobacter coinfection, 6567 (48.8%) had Salmonella monoinfection, and 6768 (50.3%) had Campylobacter monoinfection. There were no major differences in age, gender, comorbidity, hospitalization rates, 1-year mortality, or seasonal variation between coinfected patients on the one hand and each of the monoinfected patient groups on the other. The main difference was encountered between the Salmonella serotype distribution as 49.1% of coinfected patients versus 20.3% of monoinfected Salmonella patients had Salmonella serotypes other than Salmonella Enteritidis and Salmonella Typhimurium (odds ratio [95% confidence interval]: 4.07 [2.73-6.06]). In conclusion, Salmonella/Campylobacter coinfected patients were not frailer than monoinfected patients. The difference in Salmonella serotype distribution was compatible with a higher proportion of coinfections acquired during foreign travel.

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“…Gastroenteritis is also seasonal since the quantity, the strains and the severity of the infection differ by season [10][11][12]. It follows, that any study that examines gastroenteritis should control for these effects.…”

Section: An Overview Of Gastroenteritismentioning

confidence: 99%

What determines a patient’s treatment? Evidence from out of hours primary care co-op data in the Republic of Ireland

Lordan

2007

Health Care Manage Sci

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This study explores consistency in healthcare. It investigates whether vulnerable groups in the population receive the most appropriate care. This is achieved by considering the case study of individuals who present to out of hours (OOH) primary care services in the Republic of Ireland with gastroenteritis. Specifically an individual can potentially receive four services; nurse advice, doctor advice, a treatment centre consultation or a home visit. Results show that service choice is influenced by patient, call and seasonal characteristics to varying degrees. Patient symptoms are the primary driver of the type of service the patients receives. Results also indicate that the OOH primary care facilities individual characteristics do not affect service choice. This suggests a degree of consistent care across these organisations. It also provides evidence that service choice is exogenous to the organisation.

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Severity of infection and seasonal variation of non-typhoid Salmonella occurrence in humans

Cited by 24 publications

References 22 publications

Morbidity and mortality of elderly patients with zoonotic Salmonella and Campylobacter: A population-based study

Morbidity and mortality of elderly patients with zoonotic Salmonella and Campylobacter: A population-based study

Are Host Characteristics or Exposure Factors Mainly Involved in the Acquisition of ZoonoticSalmonellaandCampylobacterCoinfection in Humans?

What determines a patient’s treatment? Evidence from out of hours primary care co-op data in the Republic of Ireland

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