Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 65

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 4 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Anaplasma phagocytophilum
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 4 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
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.
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.
In the suburban and urban forests in the cities of Gdańsk, Sopot and Gdynia (northern Poland), Ixodes ricinus ticks should be considered as the vector of pathogenic microorganisms that may cause significant diseases in wild and domestic animals and humans. These microorganisms include etiologic agents of Lyme disease, human anaplasmosis (HA) and babesiosis: Borrelia burgdorferi sensu lato, Anaplasma phagocytophilum and Babesia microti, respectively. DNA extracts from 701 ticks collected in 15 localities were examined by PCR for the simultaneous detection of these 3 pathogens. Overall, 14% were infected with A. phagocytophilum followed by 12.4% with B. burgdorferi s.l. and 2.3% with B. microti. In total, the percentage of infected females (32.9%) was 2.4 times higher than in males (13.7%) and 3.2 times higher than in nymphs (10.3%). Among adult ticks (n = 303), 8.3% were dually infected with A. phagocytophilum and B. burgdorferi s.l., 2.0% with the agent of human anaplasmosis and B. microti and 0.3% with borreliae and B. microti.
The aim of the study was to establish the role of roe deer (Capreolus capreolus) as reservoirs of Anaplasma phagocytophilum and the role of Ixodes ricinus ticks as vectors of this pathogen in NorthWest Poland. Blood samples of 127 roe deer were collected between May and June 2004 and between September and December 2004. 51 of the 63 roe deer caught between May and June 2004 and 7 of the 64 roe deer caught between September and December 2004 were infested by I. ricinus ticks. 170 individuals of the common tick were collected from 45.7% of roe deer. PCR amplification of a fragment of the msp2 gene was used for detecting A. phagocytophilum DNA. Pathogen DNA was detected in 30 of the blood samples (23.6%) and in 10 ticks collected from the animals (5.9%). 28.6% of the roe deer caught between May and June 2004 and 18.75% of the roe deer caught between September and December 2004 were infected, but this difference was not significant. 5.3% of I. racinus ticks were infected by A. phagocytophilum. It is clear that C. capreolus is a significant reservoir of A. phagocytophilum in NorthWest Poland. In addition, I. ricinus is a significant vector in this area.
Ixodes ricinus and other representatives of the order Ixodida are vectors of typical pathogens: Borrelia burgdorferi sensu lato, Anaplasma phagocytophilium, Babesia spp., a tick-borne encephalitis virus, and other microorganisms which are important from a medical and veterinary point of view. The presented study focuses on the verification of nonspecific bacterial flora of I. ricinus. We analyzed ticks collected in a forest region in Silesia, an industrial district in Poland. Methods of classical microbiology and biochemical assays (API 20 NE test, API Staph test and MICRONAUT System) were used for isolation and identification of microorganisms living on the body surface of I. ricinus and inside ticks. The results show the presence of various bacteria on the surface and inside ticks’ bodies. During the study, we isolated Acinetobacter lwoffi, Pseudomonas fluorescens, Aeromonas hydrophila, Achromobacter denitrificans, Alcaligenes faecalis, Stenotrophomonas maltophilia, Pseudomonas oryzihabitans, Micrococcus spp., Kocuria varians, Staphylococcus lentus, Kocuria kristinae, Streptococcus pneumo- niae, Rhizobium radiobacter, Staphylococcus xylosus. Majority of the isolated species are non-pathogenic environmental microorganisms, but some of the isolated bacterial strains could cause severe infections.
The aim of this study was to examine the participation of roe deer, red deer, wild boar, and sheep Ixodes ricinus ticks from the Puszcza Wkrzańska Forest in Anaplasma phagocytophilum developmental cycle. Detection of A. phagocytophilum DNA was carried out on tissues collected from game animals, ticks infecting them, and ticks collected from vegetation in the hunting area, using a set of primers enabling the amplification of the 334 base pairs fragment of msp2 gene. 42.4% of the shot roe deer (25/59) were infected by l. ricinus ticks, as well as 30% (6/20) of red deer and 4.8% (1/21) of wild boars. A. phagocytophilum DNA was detected in tissues of 45.8% (27/59) of the sampled roe deer, 65% (13/20) red deer, and 4.8% (1/21) wild boar, and in 11.6% of the ticks infecting roe deer (12/103), in 5% (1/20) of the ticks infecting red deer, and in 5.5% (11/200) of the ticks collected from the vegetation in the area. The results suggest that roe and red deer are probable reservoirs of A. phagocytophilum, while the wild boar plays little or no role in the propagation of this parasite.
Niepołomice Forest is located about 20 kilometers east of Cracow (Małopolska province, southern Poland). Its natural and touristic values, as well as wide range of hosts occurring within indicate this to be an area of high risk of exposure to Ixodes ricinus and tick-borne diseases it transfers. I. ricinus is a common species in Poland and Europe. Its seasonal activity begins in Poland in the early spring, and ends with late autumn. A total number of 129 specimens of I. ricinus was collected by flagging in Niepołomice Forest. DNA was isolated by ammonia method from 30 randomly-selected individuals. PCR was used to detect tick-borne pathogens with primers specific for Anaplasma phagocytophilum, Borrelia burgdorferi sensu lato and Babesia sp. Molecular studies confirmed the presence of all three pathogens in I. ricinus. A. phagocytophilum was found in 76.7%, Babesia sp., 60%, B. burgdorferi s. l., in 3.3% of studied ticks. A. phagocytophilum co-infection with Babesia sp., was found in 46.7% of the specimens. A co-infection of all three tested pathogens was recorded in one case (3.3%). In Poland the problem of tick-borne diseases is a growing issue, therefore people residing in southern Polish touristic areas should be informed about the prevention and protection against ticks.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 4 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.