Veterinary Parasitology 194 (2013) 110–112
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Veterinary Parasitology
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How safe is the meat inspection based on artificial digestion
of pooled samples for Trichinella in pork? A scenario from
wildlife to a human patient in a non-endemic region of
Europe
Joke van der Giessen
a,*
, Frits Franssen
a
, Manoj Fonville
a
, Titia Kortbeek
a
,
Pieter Beckers
b
, Paulien Tolsma
c
, Olaf Stenvers
d
, Peter Teunis
a
,
Katsuhisa Takumi
a
a
National Institute for Public Health and The Environment (RIVM), Bilthoven, The Netherlands
b
University Medical Center St. Radboud, Nijmegen, The Netherlands
c
Municipal Health Service “Hart voor Brabant”, ‘s Hertogenbosch, The Netherlands
d
Food and Consumer Product Safety Authority (NVWA), Utrecht, The Netherlands
a r t i c l e i n f o
Keywords:
Sample testing
Trichinella
Netherlands
Risk factors
Wildlife reservoir
a b s t r a c t
The occurrence of trichinellosis in a resident of the Netherlands prompted us to exam-
ine the likelihood of this originating from infected rats in spite of prevailing biosecurity
and testing procedures. In so doing, we sought to calculate the possible risks for trichinel-
losis in countries deemed non-endemic. The infection risk was determined by simulating
a scenario from a reservoir of minimally contaminated wildlife to pigs to humans. Results
indicate that humans might become infected even in the event that artificial digestion had
been performed on individually tested pig carcasses. Our conclusions justify reconsider-
ing Trichinella control strategies based on the current testing protocol, and emphasize the
importance of proper cooking as further insurance against human infection.
© 2013 Elsevier B.V. All rights reserved.
1. Introduction
In Europe, control of Trichinella in susceptible ani-
mals destined for human consumption is mandatory and
requires detection in individual carcasses after slaughter, or
routine monitoring of certain sanitary criteria as described
by EU legislation 2075/2005 (European Commission, 2005).
To date, most countries in the EU employ individual carcass
control of commercially raised pigs for export purposes.
The most important source of human trichinellosis in
Europe is consumption of improperly processed infected
meat from pigs, horses and wild boars (Pozio et al., 2009).
*
Corresponding author.
E-mail address: joke.van.der.giessen@rivm.nl (J. van der Giessen).
The risk of human trichinellosis depends on the dose
ingested, and can range from an asymptomatic infection to
severe illness and mortality. In the Netherlands and other
western European countries, clinical illness in humans has
been absent for decades as a result of the consumption
of domestically industrialized, indoor raised pork meat.
In wildlife, however, species of Trichinella persist in the
Netherlands (Van der Giessen et al., 2001) as is true for most
EU countries. Even low infection levels in wildlife may be
transmitted to swine and then to humans as was shown by
a risk assessment described by Takumi et al. (2009).
In 2009, a 69 year old Dutch male presented in a Dutch
district hospital showing loss of muscle power in the
lower extremities. Within a few days of admission, he
developed capillary leak syndrome with severe oedema,
hypoalbuminemia and rhabdomyolysis. The patient
0304-4017/$ – see front matter © 2013 Elsevier B.V. All rights reserved.
http://dx.doi.org/10.1016/j.vetpar.2013.01.032