An economic evaluation of increased uptake in Q fever vaccination among meat and agricultural industry workers following implementation of the National Q Fever Management Program

Kermode, Michelle; Yong, Karen; Hurley, Susan F; Marmion, B. P.

doi:10.1111/j.1467-842x.2003.tb00415.x

Cited by 42 publications

(50 citation statements)

References 23 publications

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“…Therefore, the use of vaccines against Q fever in humans is still debated and there are at present no recommendations for vaccination of the general public. A risk analysis is absolutely necessary before undertaking preventive vaccination in humans using the present commercially available vaccines [76].…”

Section: Vaccinesmentioning

confidence: 99%

Is Q Fever an emerging or re-emerging zoonosis?

2005

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-Q fever is a zoonotic disease considered as emerging or re-emerging in many countries. It is caused by Coxiella burnetii, a bacterium developing spore-like forms that are highly resistant to the environment. The most common animal reservoirs are livestock and the main source of infection is by inhalation of contaminated aerosols. Although the culture process for Coxiella is laborious, advances on the knowledge of the life cycle of the bacterium have been made. New tools have been developed to (i) improve the diagnosis of Q fever in humans and animals, and especially animal shedders, (ii) perform epidemiological studies, and (iii) prevent the disease through the use of vaccines. This review summarizes the state of the knowledge on the bacteriology and clinical manifestations of Q fever as well as its diagnosis, epidemiology, treatment and prevention in order to understand what factors are responsible for its emergence or re-emergence. Coxiella burnetii / epidemiology / bacteriology / diagnostic / control

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Section: Vaccinesmentioning

confidence: 99%

Is Q Fever an emerging or re-emerging zoonosis?

2005

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“…While the cost of vaccination would go up, the number of cases prevented would also increase, resulting in an improved cost-effectiveness ratio. 20 There are limitations to the estimation of the annual risk of infection. The use of prevalence data together with most workers starting in the industry at a similar age means that there is little capacity to separate out effects due to exposure duration, age, calendar period or birth cohort.…”

Section: Controlling Infectionmentioning

confidence: 99%

Control strategies for Q fever based on results of pre‐vaccination screening in Victoria, 1988 to 2001

Greig

Patel

Clements

et al. 2005

Australian and New Zealand Journal of Public Health

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Objective: Data from Q fever prevaccination screening were analysed to determine the level of agreement between the two tests of immunity and between disease or vaccination history and immunity, trends in proportion of participants immune to Q fever, and the annual risk of infection. Method: Data from nearly 10,000 screening episodes between July 1988 and June 2001 on Victorian workers at high risk were assessed. Results: Most participants were male (86%) and employed in Victorian abattoirs (81%). Agreement between results of tests for immunity was ‘fair’ (k=0.52). Selfreported history of vaccination or infection was a poor predictor of immunity. The proportion of positive blood and skin tests increased with years of exposure to animals/meat, but decreased over the 13‐year period with shorter exposures. Hence the percentage requiring vaccination increased from 50% in 1998 to 90% in 2001. The average annual risk of infection among abattoir workers was 45.0 per 1,000 (95% CI 42.3–47.6), and 62.6 per 1,000 (95% CI 57.5–67.7) over the first 10 years of exposure. Conclusions: This is the first Australian study to estimate the annual risk of Q fever infection in abattoir workers. The study confirmed previous findings of poor agreement between screening tests and predictive value of history of vaccination/exposure. Up to 90% of new entrants in high‐risk workplaces will be susceptible to Q fever and require vaccination. Implications: Systematic post‐marketing surveillance is needed to monitor adverse events to the vaccine, duration of protection and possible reasons for vaccine failures.

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“…As A. triguttatum triguttatum is implicated in the cycle of Q fever in Queensland (the species is a natural reservoir and vector of Coxiella burnetii, the pathogen that causes Q fever), an increase in its distribution potentially signals an increase in the incidence of Q fever. Q fever is present in South Australia (Garner et al 1991;McDiarmid et al 2000), but because the disease is associated with a variety of non-specific symptoms, diagnosis is often difficult (Maurin and Raoult 1999;Kermode et al 2003;Arricau-Bouvery and Rodolakis 2005); its occurrence in the state could be more common than is currently apparent. Additionally, the disruption that A. triguttatum triguttatum, as an exotic species, may cause to local ecosystems must be assessed.…”

Section: Introductionmentioning

confidence: 99%

Seasonal density fluctuations of the exotic ornate kangaroo tick, Amblyomma triguttatum triguttatum Koch, and its distribution on Yorke Peninsula, South Australia

Waudby

Petit

2007

Parasitol Res

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The ornate kangaroo tick, Amblyomma triguttatum triguttatum, was recently recorded on southern Yorke Peninsula, South Australia. We examined seasonal fluctuations in A. triguttatum triguttatum life stages (adult, larva, and nymph) and its distribution on the peninsula. We used in situ CO2 traps and dragging cloths to determine monthly fluctuations in free-living ticks at four sites at Innes National Park from January to December 2006, and to determine the tick's distribution on wider Yorke Peninsula. At each site, 166 m2 of ground surface were directly sampled with cloths, representing 16 1-m2 CO2 stations and three 1-m-wide 50-m transects. Adult A. triguttatum triguttatum were present in January and February and from August to December, with a peak (n=54) occurring in November. Larvae were present from February to August, with their highest density (n=3067) detected in March. Nymphs were collected from January to April and from August to December, with the highest density (n=61) detected in September. Overall, A. triguttatum triguttatum numbers were highest in March when larvae peaked, and few ticks were detected in January (summer) or July (winter). Ticks occurred at several sites on southern Yorke Peninsula, supporting their invasive status.

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An economic evaluation of increased uptake in Q fever vaccination among meat and agricultural industry workers following implementation of the National Q Fever Management Program

Abstract: Introduction: Q fever is a serious but vaccine-preventable infectious disease that

Cited by 42 publications

References 23 publications

Is Q Fever an emerging or re-emerging zoonosis?

Is Q Fever an emerging or re-emerging zoonosis?

Control strategies for Q fever based on results of pre‐vaccination screening in Victoria, 1988 to 2001

Seasonal density fluctuations of the exotic ornate kangaroo tick, Amblyomma triguttatum triguttatum Koch, and its distribution on Yorke Peninsula, South Australia

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