- Publikační typ
- abstrakt z konference MeSH
In 1956-1958, excavations of Pod Hradem Cave in Moravia (eastern Czech Republic) revealed evidence for human activity during the Middle-Upper Paleolithic transition. This spanned 25,050-44,800 cal BP and contained artefacts attributed to the Aurignacian and Szeletian cultures, including those made from porcelanite (rarely used at Moravian Paleolithic sites). Coarse grained excavation techniques and major inversions in radiocarbon dates meant that site chronology could not be established adequately. This paper documents re-excavation of Pod Hradem in 2011-2012. A comprehensive AMS dating program using ultrafiltration and ABOx-SC pre-treatments provides new insights into human occupation at Pod Hradem Cave. Fine-grained excavation reveals sedimentary units spanning approximately 20,000 years of the Early Upper Paleolithic and late Middle Paleolithic periods, thus making it the first archaeological cave site in the Czech Republic with such a sedimentary and archaeological record. Recent excavation confirms infrequent human visitation, including during the Early Aurignacian by people who brought with them portable art objects that have no parallel in the Czech Republic. Raw material diversity of lithics suggests long-distance imports and ephemeral visits by highly mobile populations throughout the EUP period.
- MeSH
- archeologie metody MeSH
- Hominidae * MeSH
- jeskyně * MeSH
- lidé MeSH
- radioaktivní datování MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Česká republika MeSH
The crayfish plague pathogen, Aphanomyces astaci Schikora, has become one of the most well-studied pathogens of invertebrates. Since its introduction to Europe in the mid-19th century, it has caused mass crayfish mortalities, resulting in drastic declines of local populations. In contrast, North American crayfish usually serve as latent carriers, although they may also be negatively affected by A. astaci infections under some circumstances. Recent research benefiting from molecular tools has improved our knowledge about various aspects of A. astaci biology. In this review, we summarize these advances, particularly with respect to the host range and transmission. We highlight several aspects that have recently received particular attention, in particular newly confirmed or suspected A. astaci hosts, latent A. astaci infections in populations of European crayfish, and the relationship between A. astaci genotype groups and host taxa.
- MeSH
- Aphanomyces genetika fyziologie MeSH
- interakce hostitele a patogenu * MeSH
- severní raci mikrobiologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
- Geografické názvy
- Evropa MeSH
- Publikační typ
- abstrakt z konference MeSH
Cíl: Popsat profil nemocných s akutním srdečním selháním (ASS) z pohledu přednemocniční péče v České republice. Metodika: Data pochází z registru Zdravotnické záchranné služby (ZZS) Jihomoravského kraje z období leden 2010–prosinec 2011. Byl proveden konsekutivní sběr nemocných s podezřením na ASS. Vyloučeni byli nemocní po kardiopulmonální resuscitaci nebo zemřelí před příjezdem ZZS nebo pacienti s dominantně extrakardiální příčinou dušnosti. Srovnáni jsou nemocní transportovaní do nemocnice oproti pacientům léčeným ambulantně. Cílovým parametrem je 30denní celková mortalita. Výsledky: Z celkového počtu 131 798 nemocných bylo podezření na ASS vysloveno ve 1 964 (1,5 %) případech. Konečná diagnóza ASS byla nakonec stanovena u 1 310 pacientů, kteří byli transportováni do nemocnice s předpokladem hospitalizace. Ambulantně bylo ošetřeno 35 nemocných. Průměrný věk celé populace byl 78 let, nejčastější komorbiditou byla hypertenze (67,0 %), u téměř poloviny jsou do doby předání do nemocnice přítomny známky plicního edému (46,4 %). Ambulantně léčení nemocní jsou častěji muži (71,4 % vs 49,1 %), mají menší výskyt komorbidit a nevykazují známky těžší respirační insuficience (kyslíková saturace 96 % oproti 87 %, žádné známky plicního edému). Nejčastěji aplikovaným lékem v přednemocniční péči u pacientů s podezřením na ASS je furosemid (74,0 %). Jednoměsíční mortalita souboru dosahovala 20,7 %. Závěr: ASS představuje 1,5 % všech volání ZZS pro akutní potíže, většina nemocných je transportována do nemocnice s předpokladem hospitalizace. Časná mortalita nemocných je vysoká. Klíčové slova: akutní – srdeční selhání – úmrtnost – zdravotnická záchranná služba
Purpose: To describe the profile and management of patients with acute heart failure (AHF) in pre‑hospital care in the Czech Republic. Methods: Registry data of the Emergency Medical System (EMS) of the South Moravian region of Czech Republic were used. Patients with suspected AHF were enrolled consecutively during the period of January 2010–December 2011. Excluded were patients who died or had cardiac arrest before the arrival of EMS and those who presented with dyspnea of dominantly extra-cardiac etiology. We compared patients who were transported to the hospital with those treated in an outpatient setting. Overall mortality within the first 30 days after the initial EMS contact was assessed as a main endpoint. Results: From the 131,798 of patients who called EMS, 1,964 (1.5%) of cases were suspected of having AHF. The diagnosis of AHF was determined in 1,310 patients who were transported to the hospital; 35 were treated in Outpatients. The mean age of the study population was 78 years, the most common comorbidity was hypertension (67.0%) and almost one half of the study population had signs of pulmonary edema before being admitted to hospital (46.4%). Patients not transported to hospital were more frequently of male gender (71.4% vs. 49.1%), with lower incidence of comorbid conditions and did not have signs of respiratory distress (oxygen saturation 96% vs. 87% in those transported to the hospital; no signs of pulmonary edema). The most common drug used in pre‑hospital care in patients with suspected AHF was furosemide (74.0% patients). The 30-day mortality rate of the whole study population reached 20.7%. Conclusion: AHF represents 1.5% of all emergency calls due to acute symptoms. The vast majority of the patients are transported to the hospital with the assumption of hospitalization. Early mortality rates of these patients are high. Keywords: acute – heart failure – survival – emergency medical system
- MeSH
- akutní nemoc * MeSH
- ambulantní péče statistika a číselné údaje MeSH
- databáze faktografické MeSH
- dusičnany terapeutické užití MeSH
- furosemid terapeutické užití MeSH
- hospitalizace statistika a číselné údaje MeSH
- hypertenze epidemiologie komplikace MeSH
- komorbidita MeSH
- lidé středního věku MeSH
- lidé MeSH
- plicní edém epidemiologie komplikace MeSH
- registrace MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- srdeční selhání * diagnóza mortalita terapie MeSH
- statistika jako téma MeSH
- stupeň závažnosti nemoci MeSH
- syndrom MeSH
- urgentní zdravotnické služby * statistika a číselné údaje MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
Aphanomyces astaci, the causal agent of the crayfish plague, has recently been confirmed to infect also freshwater-inhabiting crabs. We experimentally tested the resistance of freshwater shrimps, another important decapod group inhabiting freshwaters, to this pathogen. We exposed individuals of two Asian shrimp species, Macrobrachium dayanum and Neocaridina davidi, to zoospores of the pathogen strain isolated from Procambarus clarkii, a known A. astaci carrier likely to get into contact with shrimps. The shrimps were kept in separate vessels up to seven weeks; exuviae and randomly chosen individuals were sampled throughout the experiment. Shrimp bodies and exuviae were tested for A. astaci presence by a species-specific quantitative PCR. The results were compared with amounts of A. astaci DNA in an inert substrate to distinguish potential pathogen growth in live specimens from persisting spores or environmental DNA attached to their surface. In contrast to susceptible crayfish Astacus astacus, we did not observe mortality of shrimps. The amount of detected pathogen DNA was decreasing steadily in the inert substrate, but it was still detectable several weeks after zoospore addition, which should be considered in studies relying on molecular detection of A. astaci. Probably due to moulting, the amount of A. astaci DNA was decreasing in N. davidi even faster than in the inert substrate. In contrast, high pathogen DNA levels were detected in some non-moulting individuals of M. dayanum, suggesting that A. astaci growth may be possible in tissues of this species. Further experiments are needed to test for the potential of long-term A. astaci persistence in freshwater shrimp populations.
- MeSH
- Aphanomyces genetika fyziologie MeSH
- Decapoda (Crustacea) genetika mikrobiologie MeSH
- interakce hostitele a patogenu * MeSH
- odolnost vůči nemocem genetika MeSH
- Palaemonidae genetika mikrobiologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
North American crayfish species as hosts for the crayfish plague pathogen Aphanomyces astaci contribute to the decline of native European crayfish populations. At least six American crayfish species have been reported in the Netherlands but the presence of this pathogenic oomycete with substantial conservational impact has not yet been confirmed in the country. We evaluated A. astaci prevalence in Dutch populations of six alien crustaceans using species-specific quantitative PCR. These included three confirmed crayfish carriers (Orconectes limosus, Pacifastacus leniusculus, Procambarus clarkii), two recently introduced but yet unstudied crayfish (Orconectes cf. virilis, Procambarus cf. acutus), and a catadromous crab Eriocheir sinensis. Moderate levels of infection were observed in some populations of O. limosus and P. leniusculus. Positive results were also obtained for E. sinensis and two Dutch populations of O. cf. virilis. English population of the latter species was also found infected, confirming this taxon as another A. astaci carrier in European waters. In contrast, Dutch P. clarkii seem only sporadically infected, and the pathogen was not yet detected in P. cf. acutus. Our study is the first confirmation of crayfish plague infections in the Netherlands and demonstrates substantial variation in A. astaci prevalence among potential hosts within a single region, a pattern possibly linked to their introduction history and coexistence.
- MeSH
- Aphanomyces genetika MeSH
- přenašečství mikrobiologie MeSH
- prevalence MeSH
- severní raci mikrobiologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Nizozemsko MeSH
- Publikační typ
- abstrakt z konference MeSH
The crayfish plague pathogen, Aphanomyces astaci, is one of the most serious threats to indigenous European crayfish species. The North American invasive spiny-cheek crayfish, Orconectes limosus, is an important source of this pathogen in central and western Europe. We evaluated potential changes in A. astaci spore release rate from infected individuals of this species by experiments investigating the pathogen transmission to susceptible noble crayfish, Astacus astacus. We filtered defined volumes of water regularly to quantify spore concentration, and sampled crayfish tissues at the end of the experiment. The filters and tissues were then tested for the presence of A. astaci DNA by species-specific quantitative PCR. Additionally, we tested the efficiency of horizontal transmission to apparently uninfected O. limosus. The experiments confirmed that A. astaci can be transmitted to susceptible crayfish during intermoult periods, and that the pathogen was more frequently detected in noble crayfish recipients than in American ones. The pathogen spore concentrations substantially varied in time, and significantly increased during moulting of infected hosts. Our study strengthens the evidence that although the likelihood of crayfish plague transmission by water transfer from localities with infected American crayfish might increase when these are moulting or dying, no time-periods can be proclaimed safe.
Many populations of the narrow-clawed crayfish Astacus leptodactylus in Turkey, including those inhabiting Lake Eğirdir, declined drastically in the mid-1980s due to introduction of crayfish plague Aphanomyces astaci. However, unlike many other localities, there has been some recovery in the A. leptodactylus population inhabiting this lake even though crayfish plague has been suspected to have persisted since then. In support of this, DNA from 5 of 34 healthy-looking crayfish sampled recently from the lake tested positive by both conventional and real-time PCR using species-specific primers targeting the rDNA internal transcribed spacer region, and product sequence analysis confirmed the identification of A. astaci. This complies with other recent reports of coexistence of native European crayfish with this pathogen, and further research is now needed to identify the key mechanisms allowing it.
- MeSH
- hustota populace MeSH
- jezera MeSH
- polymerázová řetězová reakce metody MeSH
- severní raci mikrobiologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Turecko MeSH
