scholarly journals ЗБЕРЕЖЕННЯ ЖИТТЄЗДАТНОСТІ ЯЄЦЬ ТА ЛИЧИНОК СТРОНГIЛЯТ I АСКАРИДАТ У ДОВКІЛЛІ В ЗИМОВИЙ ПЕРІОД

2016 ◽  
Vol 18 (2(66)) ◽  
pp. 189-192
Author(s):  
D.V. Feshenko ◽  
T.I. Bakhur ◽  
O.A. Zgozinska
Keyword(s):  
Air Temperature ◽  
Toxocara Canis ◽  
Late Winter ◽  
Parascaris Equorum ◽  
Source Of Infection ◽  
Eggs And Larvae ◽  
Flotation Solution ◽  
Winter Air Temperature

This paper presents the results of the helminthological study of sand, hay and silage in different periods of 2010 – 2015. It was established that on the territory of Polissya the eggs and larvae of nematodes (Parascaris equorum, Strongylidae sp., Toxocara canis) at typical winter air temperature (-15 – +3 °C) remain viable in the environment, contributing to the spread of continuous year-round animal infestation.We prove that in the stall period of keeping animals rough and succulent feed (hay, silage) can be a source of infection of nematodes even in late winter: according to our data, in February in the hay the number of eggs P. equorum was 2.6 ± 0.74 eggs/3 drops of flotation solution, in the silage – 8.8±1.01, and Strongylidae sp. – 3.2 ± 0.73 and 5.6 ± 0.6 eggs/3 drops of flotation solution respectively. Consequently, for the prevention of helminthiasis all harvested food should be checked for the presence of pathogens in it.Maximum contamination of sand from playgrounds in the Zhytomyr region by toxocara eggs was: 674.6 eggs/3 drops of flotation solution in autumn and 60.3 – in the spring. Totally 12.8–18.4% of T. canis eggs are overwintering in the sand successfully. The data should be considered when planning preventive veterinary measures. Recommended in disadvantaged regions to carry out preventive deworming animals every 3 months.

Serological response of ascarid-free dogs to Toxocara canis infection

Parasitology ◽  
1981 ◽  
Vol 82 (3) ◽  
pp. 383-387 ◽  
Author(s):  
L. T. Glickman ◽  
J. P. Dubey ◽  
L. J. Winslow
Keyword(s):  
Immunosorbent Assay ◽  
Negative Correlation ◽  
Significant Negative Correlation ◽  
Toxocara Canis ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serological Response ◽  
Eggs And Larvae

SUMMARYAntibodies to Toxocara were measured by enzyme-linked immunosorbent assay (ELISA) in sera of ascarid-free dogs which had been fed 0,100 or 10000 embryonated T. canis eggs. Dogs fed 10000 eggs developed higher titres than those given 100 eggs and larvae failed to complete their migration to the gut. In addition, in dogs given 100 eggs, there was a significant negative correlation between the number of worms in the gut and granulomatous foci in the lung. The data suggest that the ELISA is sensitive and specific for Toxocara infection in dogs.

Experimental infection of the cockroachPeriplaneta americanawithToxocara canisand the establishment of patent infections in pups

2008 ◽  
Vol 82 (2) ◽  
pp. 97-100 ◽  
Author(s):  
N.K. Sasmal ◽  
T.K. Pahari ◽  
R. Laha
Keyword(s):  
Experimental Infection ◽  
Post Infection ◽  
Periplaneta Americana ◽  
Toxocara Canis ◽  
Tissue Migration ◽  
Eggs And Larvae

AbstractThe possible role of the cockroachPeriplaneta americanain the transmission ofToxocara caniseggs and larvae via faeces and tissue migration was studied. Cockroaches fed with 3 × 105and 5 × 105embryonated eggs were found to harbour viable eggs and larvae from days 1 to 5 post-infection (DPI). At necropsy on 5 DPI, eggs and larvae were also recovered from the rectal contents but not from the tissues of cockroaches. In addition patent infections were established in pups fed on infected faeces of cockroaches, with eggs first appearing in the faeces of pups at 38 DPI. Adult worms ofT. caniswere also recovered at necropsy. Therefore the importance of cockroaches as good mechanical disseminators of ascarid eggs, especiallyT. canis, is discussed.

Contrasting Impacts of the Arctic Oscillation on Surface Air Temperature Anomalies in Southern China between Early and Middle-to-Late Winter

2015 ◽  
Vol 28 (10) ◽  
pp. 4015-4026 ◽  
Author(s):  
Jinqing Zuo ◽  
Hong-Li Ren ◽  
Weijing Li
Keyword(s):  
Mediterranean Sea ◽  
Air Temperature ◽  
Arctic Oscillation ◽  
Southern China ◽  
Phase Relationship ◽  
Surface Air Temperature ◽  
The Arctic ◽  
Late Winter ◽  
Upper Level ◽  
The Arctic Oscillation

Abstract In the boreal winter, the Arctic Oscillation (AO) evidently acts to influence surface air temperature (SAT) anomalies in China. This study reveals a large intraseasonal variation in the relationship between the winter AO and southern China SAT anomalies. Specifically, a weak in-phase relationship occurs in December, but a significant out-of-phase relationship occurs in January and February. The authors show that the linkage between the AO and southern China SAT anomalies strongly depends on the AO-associated changes in the Middle East jet stream (MEJS) and that such an AO–MEJS relationship is characterized by a significant difference between early and middle-to-late winter. In middle-to-late winter, the Azores center of high pressure anomalies in the positive AO phase usually extends eastward and yields a significantly anomalous upper-level convergence over the Mediterranean Sea, which can excite a Rossby wave train spanning the Arabian Sea and intensify the MEJS. In early winter, however, the Azores center of the AO is apparently shifted westward and is mainly confined to the Atlantic Ocean; in this case, the associated change in the MEJS is relatively weak. Both observational diagnoses and experiments based on a linearized barotropic model suggest that the MEJS is closely linked to the AO only when the latter generates considerable upper-level convergence anomalies over the Mediterranean Sea. Therefore, the different impacts of the AO on the MEJS and the southern China SAT anomalies between early and middle-to-late winter are primarily attributed to the large intraseasonal zonal migrations of the Azores center of the AO.

scholarly journals Lake water and talik groundwater interaction in continuous permafrost, Central Yakutia

2019 ◽  
Vol 98 ◽  
pp. 07024
Author(s):  
Nadezhda Pavlova ◽  
Liudmila Lebedeva ◽  
Vladimir Efremov
Keyword(s):  
Chemical Composition ◽  
Air Temperature ◽  
Lake Water ◽  
Structural Features ◽  
Downward Trend ◽  
Hydrological Data ◽  
Hydrochemical Data ◽  
Continuous Permafrost ◽  
Solids Content ◽  
Winter Air Temperature

Structural features of a lake talik associated with eolian relief are discussed. Analysis of hydrochemical and hydrological data for 2010-2017 showed that talik groundwater feeds lake and maintains perennial outflow from the lake. Variations in the chemical composition of the lake and outflowing creek are characterized on an annual and interannual basis. Seasonal comparison of hydrochemical data indicates a downward trend in dissolved-solids content of the lake water over the last six years, suggesting an increasing contribution of suprapermafrost groundwater to the lake and lake talik. Probable reason of enhanced suprapermafrost flow is increase of its duration due to observed rise of winter air temperature.

scholarly journals Prevalence of zoonotic helminths in Italian house dogs

2018 ◽  
Vol 12 (08) ◽  
pp. 666-672 ◽  
Author(s):  
Francesco La Torre ◽  
Angela Di Cesare ◽  
Giulia Simonato ◽  
Rudi Cassini ◽  
Donato Traversa ◽  
...  
Keyword(s):  
Toxocara Canis ◽  
Parasitic Nematodes ◽  
Source Of Infection ◽  
North Eastern ◽  
Treatment Plans ◽  
Stool Samples ◽  
Zoonotic Parasites ◽  
Privately Owned ◽  
Trichuris Vulpis ◽  
Echinococcus Spp

Introduction: Dogs may act as potential sources of zoonotic parasites, e.g. intestinal helminths like Toxocara spp., Ancylostoma spp., Echinococcus spp. In particular circumstances, the environment contaminated by parasitic elements represents a source of infection for people and animals. The present study has evaluated the presence of zoonotic helminths in house dogs from central and north-eastern Italy. Methodology: Stool samples from 493 dogs were examined by a qualitative copromicroscopic technique and differences in prevalence of zoonotic parasites were statistically examined in relation to canine individual data. Results: 48/493 (9.7%) were positive for at least one parasite. Helminths recovered were Trichuris vulpis (5.5%), Toxocara canis (4.3%), Ancylostoma spp. (0.6%) and Eucoleus aerophilus (0.4%), while no cestodes were detected. Age and living with other dogs resulted risk factors for T. canis infection. Conclusions: The health risk associated with the occurrence of parasitic nematodes in privately owned dogs, along with the current anthelmintic treatment plans, are discussed.

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