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Control strategy for Echinococcus multilocularis.

Hegglin D, Deplazes P - Emerging Infect. Dis. (2008)

Bottom Line: Echinococcus multilocularis, the causative agent of zoonotic alveolar echinococcosis, can be controlled effectively by the experimental delivery of anthelminthic baits for urban foxes.Monthly baiting over a 45-month period was effective for long-lasting control.Trimonthly baiting intervals were far less effective and did not prevent parasite recovery.

View Article: PubMed Central - PubMed

Affiliation: Institute of Parasitology, University of Zurich, Zurich, Switzerland. dhegglin@access.uzh.ch

ABSTRACT
Echinococcus multilocularis, the causative agent of zoonotic alveolar echinococcosis, can be controlled effectively by the experimental delivery of anthelminthic baits for urban foxes. Monthly baiting over a 45-month period was effective for long-lasting control. Trimonthly baiting intervals were far less effective and did not prevent parasite recovery.

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Related in: MedlinePlus

Study area of the anthelminthic baiting experiments in the conurbation of Zurich, Switzerland. Thirteen study plots were defined along the urban periphery during the 2-phased baiting period (phase 1, April 2000–October 2001; phase 2, November 2001–December 2003). Five different treatment schemes were used in these plots: co/co = no bait delivery during the whole study (n = 3 sites of 1 km2 ); b1/b3 = bait delivered monthly during the first phase and trimonthly during the second phase (n = 3); co/b3, no bait delivery during the first and trimonthly delivery during the second phase (n = 3); b1/co, monthly bait delivery during the first and no delivery during the second phase (n = 3); b1/b1, monthly bait delivery during the first and the second phase in a single study plot. This largest study plot comprised initially an area of 6 km2 (gray line) and finally an area of 2 km2 during the second baiting phase.
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Figure 1: Study area of the anthelminthic baiting experiments in the conurbation of Zurich, Switzerland. Thirteen study plots were defined along the urban periphery during the 2-phased baiting period (phase 1, April 2000–October 2001; phase 2, November 2001–December 2003). Five different treatment schemes were used in these plots: co/co = no bait delivery during the whole study (n = 3 sites of 1 km2 ); b1/b3 = bait delivered monthly during the first phase and trimonthly during the second phase (n = 3); co/b3, no bait delivery during the first and trimonthly delivery during the second phase (n = 3); b1/co, monthly bait delivery during the first and no delivery during the second phase (n = 3); b1/b1, monthly bait delivery during the first and the second phase in a single study plot. This largest study plot comprised initially an area of 6 km2 (gray line) and finally an area of 2 km2 during the second baiting phase.

Mentions: The study, conducted during 1999 and 2007, was designed as a follow-up to an experimental field study that had been conducted in the conurbation of Zurich (11). Along the urban periphery, we selected 12 study plots of 1-km2 each and 1 additional, 6-km2, plot. Experimental bait delivery was structured in 2 phases: April 2000–October 2001 and November 2001–December 2003. Within these 2 periods, a total of 5 different treatment schemes were used in the study plots:1 ) no bait delivery during the whole study (co/co); 2) monthly bait delivery during the first phase and trimonthly delivery during the second phase (b1/b3); 3) no bait delivery during the first phase and trimonthly delivery during the second phase (co/b3); 4) monthly bait delivery during the first phase and no delivery during the second phase (b1/co); and 5) monthly bait delivery during the first phase and the second phase (b1/b1) (Figure 1).


Control strategy for Echinococcus multilocularis.

Hegglin D, Deplazes P - Emerging Infect. Dis. (2008)

Study area of the anthelminthic baiting experiments in the conurbation of Zurich, Switzerland. Thirteen study plots were defined along the urban periphery during the 2-phased baiting period (phase 1, April 2000–October 2001; phase 2, November 2001–December 2003). Five different treatment schemes were used in these plots: co/co = no bait delivery during the whole study (n = 3 sites of 1 km2 ); b1/b3 = bait delivered monthly during the first phase and trimonthly during the second phase (n = 3); co/b3, no bait delivery during the first and trimonthly delivery during the second phase (n = 3); b1/co, monthly bait delivery during the first and no delivery during the second phase (n = 3); b1/b1, monthly bait delivery during the first and the second phase in a single study plot. This largest study plot comprised initially an area of 6 km2 (gray line) and finally an area of 2 km2 during the second baiting phase.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2609876&req=5

Figure 1: Study area of the anthelminthic baiting experiments in the conurbation of Zurich, Switzerland. Thirteen study plots were defined along the urban periphery during the 2-phased baiting period (phase 1, April 2000–October 2001; phase 2, November 2001–December 2003). Five different treatment schemes were used in these plots: co/co = no bait delivery during the whole study (n = 3 sites of 1 km2 ); b1/b3 = bait delivered monthly during the first phase and trimonthly during the second phase (n = 3); co/b3, no bait delivery during the first and trimonthly delivery during the second phase (n = 3); b1/co, monthly bait delivery during the first and no delivery during the second phase (n = 3); b1/b1, monthly bait delivery during the first and the second phase in a single study plot. This largest study plot comprised initially an area of 6 km2 (gray line) and finally an area of 2 km2 during the second baiting phase.
Mentions: The study, conducted during 1999 and 2007, was designed as a follow-up to an experimental field study that had been conducted in the conurbation of Zurich (11). Along the urban periphery, we selected 12 study plots of 1-km2 each and 1 additional, 6-km2, plot. Experimental bait delivery was structured in 2 phases: April 2000–October 2001 and November 2001–December 2003. Within these 2 periods, a total of 5 different treatment schemes were used in the study plots:1 ) no bait delivery during the whole study (co/co); 2) monthly bait delivery during the first phase and trimonthly delivery during the second phase (b1/b3); 3) no bait delivery during the first phase and trimonthly delivery during the second phase (co/b3); 4) monthly bait delivery during the first phase and no delivery during the second phase (b1/co); and 5) monthly bait delivery during the first phase and the second phase (b1/b1) (Figure 1).

Bottom Line: Echinococcus multilocularis, the causative agent of zoonotic alveolar echinococcosis, can be controlled effectively by the experimental delivery of anthelminthic baits for urban foxes.Monthly baiting over a 45-month period was effective for long-lasting control.Trimonthly baiting intervals were far less effective and did not prevent parasite recovery.

View Article: PubMed Central - PubMed

Affiliation: Institute of Parasitology, University of Zurich, Zurich, Switzerland. dhegglin@access.uzh.ch

ABSTRACT
Echinococcus multilocularis, the causative agent of zoonotic alveolar echinococcosis, can be controlled effectively by the experimental delivery of anthelminthic baits for urban foxes. Monthly baiting over a 45-month period was effective for long-lasting control. Trimonthly baiting intervals were far less effective and did not prevent parasite recovery.

Show MeSH
Related in: MedlinePlus