New article: "Seroprevalence of Toxoplasma gondii in free-ranging wild boars hunted for human consumption in Estonia"

Abstract from Acta Vet Scand. 2015 Aug 4;57
"Background
Although the prevalence of human Toxoplasma gondii infections is high in Estonia, no information is available on the prevalence of infections in the local animal populations. Wild boars are a good indicator species for estimating the prevalence and spread of T. gondii and were thus investigated in this nationwide cross-sectional study. Volunteer hunters sampled cardiac or skeletal muscle of 471 wild boars legally hunted for human consumption in Estonia during the hunting season of 2012–2013. Serosanguineous meat juice samples were obtained from thawed tissue samples, diluted 1:40, and screened for specific anti-T. gondii IgG antibodies with a commercial direct agglutination test.

Results

Almost one-quarter (113; 24%) of the wild boars examined were seropositive for T. gondii. The seroprevalence did not differ significantly between age groups or sexes. The seroprevalence was lowest in Viljandimaa, which is located in the southern part of Estonia. In other counties, the infection was evenly prevalent.

Conclusions

In Estonia, wild boars are commonly exposed to T. gondii, which is endemic and widespread. The consumption of raw or undercooked meat of Estonian wild boars may pose an infection risk to humans and other hosts."


Full article available here: 
Jokelainen P, Velström K, Lassen B. Seroprevalence of Toxoplasma gondii in free-ranging wild boars hunted for human consumption in Estonia. Acta Vet Scand. 2015 Aug 4;57:42. doi: 10.1186/s13028-015-0133-z.

Estonian newspaper Maaleht 26 September 2015: 
Veerand Eesti metssigadest on toksoplasmaga kokku puutunud

Echinococcus multilocularis in Tartu city, Estonia

Update.
Publications released in connection with this article:

• Plumer L, Davison J, Saarma U (2014) Rapid Urbanization of Red Foxes in Estonia: Distribution, Behaviour, Attacks on Domestic Animals, and Health-Risks Related to Zoonotic Diseases. PLoS ONE 9(12): e115124. doi:10.1371/journal.pone.0115124
• Laurimaa L, Davison J, Plumer L, Süld K, Oja R, Moks E, et al. Noninvasive detection of Echinococcus multilocularis tapeworm in urban area, Estonia [letter]. Emerg Infect Dis [Internet]. 2015 Jan [date cited]. http://dx.doi.org/10.3201/eid2101.140136

In an interview with Urmas Saarma (University of Tartu) in the Estonian newspaper Õhtuleht September 4th 2014 the sad reality about the dangerous parasite Echinococcus multilocularis in Estonia was discussed.

The dangerous parasite can be found in one out of three foxes in Estonia. The eggs of the parasite that can infect humans, has been found in 7% of the fox faeces collected within the second largest city of Estonia, Tartu.

Article:
http://www.ohtuleht.ee/593010/koos-rebastega-hiilib-linnadesse-kole-parasiit

In the Estonian section it is possible to read about the parasite in an article by Epp Moks from University of Tartu

Dr. Süld and colleagues recently published an article on zoonotic diseases, including E. multilocularis, in raccoon dogs.
Süld K, Valdmann H, Laurimaa L, Soe E, Davison J, Saarma U. An Invasive Vector of Zoonotic Disease Sustained by Anthropogenic Resources: The Raccoon Dog in Northern Europe. PLoS One. 2014 May 22;9(5):e96358. doi: 10.1371/journal.pone.0096358. eCollection 2014.

Official statistics on detected cases of echinococcosis in Estonia (Echinococcus multilocularis or Echinococcus granulosus - not specified) can be found in at the Estonian Health Boards homepage ("Nakkushaigused Eestis 2011-2013") or at the official reports from the European Centre of Disease Control and Prevention report of Annual epidemiological report "Reporting on 2011 surveillance data and 2012 epidemic intelligence data" (page 80).

New insight into how bovine Eimeria oocysts may survive freezing

Bovine Eimeria parasites survives and thrives well in the Northern hemisphere. But how do they handle sub-zero temperatures during winter months and does it matter if the oocysts of the parasite are sporulated into an infective stage or not?

A new laboratory study of these questions has just been released. It appears that bovine Eimeria species are able to handle sub-zero temperature and even sporulate from a frozen unsporulated stage once thawed. The results indicate there may be differences between Eimeria species to tolerate the changes in temperature.

For experimental purposes the study demonstrated that freezing in an oxidizing sporulation medium (2% K2Cr2O7) significantly reduced the number of oocysts tolerating sub-zero temperatures. Some previous studies that investigated oocysts sub-zero tolerance to temperatures used  an oxidixing sporulation medium as the freezing medium.
 
The study also demonstrated a significant breakdown by microbial activity in fecal samples left at room temperature compared to a sterile solution over a duration of one month. These results indicate that microbial predators of the parasite oocyst may play a significant role in the parasites persistence.  

Link to article (Open Access)
Lassen B, Seppä-Lassila L, 2014. RECOVERY AND SPORULATION OF BOVINE EIMERIA OOCYSTS AFTER EXPOSURE TO SUB-ZERO TEMPERATURE. Vet Med Zoot. T. 66 (88), 35-39.

Cryptosporidiosis appears to be an occupational disease in Estonia

A new case study has just been published that challenge the mysterious absence of reported cases in Estonia of the diarrhoea causing disease cryptosporidiosis.

The article provide evidence that the infections from cattle to humans may be a specific subtype of Cryptosporidium parvum - so far reported found mainly in humans and animals in Eastern European countries.

The full article is available for download by following this link:
Lassen, Brian; Ståhl, Marie; Heidi, L. Enemark (2014). Cryptosporidiosis – an occupational risk and a disregarded disease in Estonia. Acta Veterinaria Scandinavica, 56(36), 1 - 3.

Defense of a graduation thesis on Toxoplasma gondii

Upcoming defense in parasitology

Kärt Must
Toxoplasma gondii Seroprevalence in Cats in Estonia
Graduation thesis in veterinary medicine
Link to study summary

Location and time:
Estonian University of Life Sciences
Kreutzwaldi 62, room A201
Tartu
Estonia

Date: June 5th 2014
Time: 9:00

Supervisors: Pikka Jokelainen and Brian Lassen
Opponent: Marika Masso, University of Tartu

A popular science paper on Toxoplasma gondii has been published in the magazine Lemmik!

Pikka Jokelainen, Marilin Janson, Kärt Must. Toksoplasmadega nakatumist saab ennetada. Lemmik, oktoober 2013 (23): 43-46. Price: 1.95€.

Link to article online

Emerging parasitic zoonoses in Estonia, and why the Northern Big Brother should be concerned

On Thursday, October 17^th, Brian Lassen will hold a seminar at Evira Headquarters, Mustialankatu 3, Viikki, in Kalevi lecture hall, at 15.00-16.00, about EMERGING PARASITIC ZOONOSES IN ESTONIA, AND WHY THE NORTHERN BIG BROTHER SHOULD BE CONCERNED.

The talk will be on emerging, re-emerging and endemic parasitic zoonoses in Estonia, some of them well-known also in Finland, some with evident potential to spread into Finland.