Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Ograniczanie wyników
Czasopisma help
Lata help
Autorzy help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 159

Liczba wyników na stronie
first rewind previous Strona / 8 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  tick
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 8 next fast forward last
EN
Ticks constitute important vectors of human and animal pathogens. Besides the Lyme borreliosis and tick-borne encephalitis, other pathogens such as Babesia spp., Rickettsia spp., and Anaplasma phagocytophilum, are of increasing public health interest. In Poland, as in other European countries, Ixodes ricinus, the most prevalent tick species responsible for the majority of tick bites in humans, is the main vector of A. phagocytophilum. The aim of the study was to estimate the infection level of I. ricinus with A. phagocytophilum in selected districts, not previously surveyed for the presence of this agent. Sampling of questing ticks was performed in 12 forested sites, located in four districts (Legnica, Milicz, Lubań, and Oława) in SW Poland. Altogether, 792 ticks (151 females, 101 males, and 540 nymphs) representing I. ricinus were checked for the presence of A. phagocytophilum. The average infection level was 4.3%, with higher rate reported for adult ticks. The highest percentage of infected adults was observed in Milicz (17.4%) and the lowest in Oława (6.8%). The abundance of questing I. ricinus in all examined sites as well as the infection with A. phagocytophilum indicate for the first time the risk for HGA transmission in SW Poland.
EN
The ornate dog tick (Dermacentor reticulatus) can be found in the temperate zones of Eurasia. Its area of occurrence is divided into east and west distributions, although the area as a whole is expanding. The initial east-west division was most probably associated with the varied climatic profile of Europe, for example, the range of specific mean winter and summer temperatures: the region where D. reticulatus is absent is characterized by mean winter temperatures between 0°C and 5°C and thin snow cover. The present expansion may be the effect of climate change. The mean temperatures in Europe have increased, the vegetation season has lengthened and positive trends in the number of wet days can be seen. Consequently, northern Europe has become warmer and wetter over the last century. human activity can also influence the spread of D. reticulatus. The liquidation of habitats suitable for D. reticulatus and the eradication of their hosts can play a role, as can changes in agricultural land use, environmental protection and the spread of international tourism and trade. In summary, the expansion of D. reticulatus into new areas could be the synergistic effect of many favourable factors.
13
75%
EN
The epidemiological and epizootic importance of ticks has been known for a few decades since of the discovery of their role as vectors of many new diseases, and the better detection of those already known. Given the durability of chemical preparations in the environment and the increasing problem of developing tick resistance, natural strategies for biological control are sought. A promising alternative to chemical pesticides is the use of entomopathogenic organisms for effective integrated pest management of low environmental impact. A number of promising microbes have been identified during the search for effective means of controlling the tick population, but the knowledge about the impact of these pathogens on the environment and other non-target organisms is still insufficient. Previous research has still not provided a definite answer about the safety of their use. It is known, however, that the chemicals which are currently used have a negative impact on the environment and/or cause resistance. No efficient biocompound has yet been devised for commercial use. Potential microorganisms for tick biocontrol (mainly bacteria and fungi) are natural tick pathogens, living in the same environment. With their adhesive properties, and their ability to digest the cuticle, they may constitute an appropriate ingredient of bioacaricides. Until now, fungal insecticides have been used only to control crop pests.
PL
Nie są owadami, mają osiem nóg i ich najbliższymi krewniakami są roztocza, zaś nieco dalszymi – pająki i skorpiony. Kleszcze to pajęczaki należące do nadrzędu o oddającej chyba istotę rzeczy nazwie – dręcze.
EN
Sera of 500 inhabitants of north-eastern Poland, 450 suspected for Lyme borreliosis and 50 blood donors (control group), were analysed for the presence of IgG antibodies against Anaplasma phagocytophilum, the causative agent of human anaplasmosis (HA), known so far as human granulocytic ehrlichiosis (HGE). Forty one (9.1%) sera of the study group and one serum (2%) of the control group were positive using indirect fluorescence assay (IFA). The seropositivity tended to be more frequent among males (10.3%) than females (7.6%) and among the rural (10.3%) than urban population (7.5%); however, differences were of no statistical significance (p = 0.4). No age difference was found between the seropositive and the seronegative individuals (p = 0.77). The only factor increasing the risk of HA seropositivity found was forestry employment (p < 0.05). Additionally, a total of 559 Ixodes ricinus ticks, collected in the same area as sera, were investigated for the presence of A. phagocytophilum by the polymerase chain reaction (PCR) and 41 (8.7%) of them were found to be positive. The infection level ranged from 2.3-13.7%, depending on the area studied. Bacteria were significantly less frequently detected in nymphs - 2.1% (5/235) than in adult ticks - 13.6% (44/324) and in males - 4.2% (74/165) than in females - 23.3% (37/159) (p ? 0.05). The obtained results confirm both the occurrence of HA foci in north-eastern Poland with I. ricinus as the principal vector of the A. phagocytophilum infection, and forestry workers as the main group at risk.
first rewind previous Strona / 8 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.