Prevalence of hepatitis A virus infection among sewage workers in Singapore

Heng, Bee Hoon; Goh, Kee Tai; Doraisingham, S; Quek, G H

doi:10.1017/s0950268800051530

Cited by 49 publications

(24 citation statements)

References 31 publications

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“…Sltinh@j reported an increased occurrence of antibodies against hepatitis A virus in Danish sewage-exposed worlters (3). Heng et a1 (4) described an increased risk for hepatitis A infection among sewage workers in Singapore.…”

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confidence: 99%

Prevalence of Helicobacter pylori infection among sewage workers

Friis¹,

Engstrand²,

Edling³

1996

Scand J Work Environ Health

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Objectives An increased risk for gastric cancer among sewage workers has been described in several studies. During the last decade the bacterium Helicobncter pylori has emerged as one important risk factor for gastric cancer and is now considered a class I carcinogen by the International Agency for Research on Cancer. The route of transmission for this bacterium remains unclear, but fecal-oral transmission has been proposed. If true, this might entail a yet undescribed risk for sewage workers. Method The prevalence of immunoglobulin G (IgG) antibodies against H ~l o r i was studied with a crosssectional study design in a group of 289 municipal workers. Samples of serum from 151 sewage workers at 11 sewage plants in Sweden and of serum from 138 referents were analyzed. The referents were group matched for age and socioeconomic status. Results The prevalence of IgG antibodies against Hpylori arnong sewage workers did not differ from that of the referents. The adjusted odds ratio (adjOR) was calculated from a logistic model with age and residence as confounding variables (adjOR 0.90, 95% confidence interval 0.53-1.5). The previously described increase in the prevalence of IgG antibodies against H pylori with increasing age was observed. Geographic differences were also observed in the prevalence of Hpylori in Sweden. C O~C~U S~O~S The exposures in sewage work in Sweden do not cause an increased risk of infection withHpylori.

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confidence: 99%

Prevalence of Helicobacter pylori infection among sewage workers

Friis¹,

Engstrand²,

Edling³

1996

Scand J Work Environ Health

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“…They showed that the prevalance was increasing with the age, but the subjects aged 20-29 was showing the least amount of seropositivity. The change in seropositivity was associated with the development of Korea accompanied by an improvement in Age group n Anti HAV IgG positivity in Usak n (%) individual and social hygiene [14,15]. Pham et al [16] showed that the seropositivity of HAV in Canada was 1% in 8-13 ages group and increasing up to 17 % in 30-39 years group.…”

Section: Discussionmentioning

confidence: 99%

Hepatitis A seropositivity: comparative results of two hospitals in Turkey

Ağca¹

2013

JCAM

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Anahtar KelimelerHepatit A; Hijyen; Seropozitiflik Abstract Aim: Hepatitis A virus (HAV) is a ribonucleic acid (RNA) picornavirus transmitted by fecal-oral route. HAV is usually silent or subclinic in children and on a worldwide scale only 5 % of infections are recognised clinically. In this study we aimed to determine the seroprevalance of HAV seropositivity in two different hospitals in the Aegean region of Turkey. Material and Method: Serum samples, which were taken from patients to investigate hepatitis A antibodies administrated to Usak State Hospital and Tavsanli Doc. Dr. M. Kalemli State Hospital between January 2011 and December 2011 were investigated for hepatitis A seropositivity retrospectively. Age, sex, Anti HAV Ig G and Anti HAV Ig M were investigated. Results: 799 patients in Usak State Hospital and 461 patients in Tavsanli State hospital were investigated for Anti HAV Ig G and Anti HAV Ig M. 78 % were female, 22 % were male and mean age was 27,7 in Usak State Hospital. 54 % were female, 46 % were male, mean age was 38,0 in Tavsanli State Hospital. Anti-HAV Ig M positivity in Usak and Tavsanli State Hospital are 1,3 % and 0,6 % respectively. Anti-HAV Ig G positivity in Usak and Tavsanli State Hospital are 75,5 % and 80,4 % respectively. Discussion: Improvement of public and individual hygiene, education about hygiene, improvement of education and socioeconomic level of public and vaccination against HAV as recommended by the World Health Organisation may decrease the burden of HAV infection.

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“…There were nine original epidemiologic studies on the risk of acquiring hepatitis A through occupational exposure to sewage due to work in a sewage plant (13)(14)(15)(16)(17)(18)(19)(20)(21). Cohort studies would have provided the best evidence, but we found only cross-sectional studies.…”

Section: Work Visual Display Units and Burning Eyesmentioning

confidence: 94%