Anthelmintic drugs are widespread environmental contaminants, but their impact is still poorly understood. Although contact of parasitic nematode Haemonchus contortus with traces of anthelmintic drug albendazole (ABZ) altered the expression and activity of several UDP-glycosyl transferases (UGTs) and P-glycoproteins (Pgps, belonging to ABC-transporters), key enzymes in endogenous and xenobiotic metabolism, it is not known whether these changes will last during the life cycle and pass to the next generations. In the present study simulating the environmental-like exposure, free-living stages of H. contortus were exposed or unexposed to a sub-lethal dose of ABZ and its transformation products (ABZs) during L3 development. The L3 served for lambs' infection and obtaining of H. contortus adults and eggs, which were again exposed or unexposed to ABZs during L3 development. The expression pattern of UGTs and Pgps was analysed and compared in the first generation of L3, in the adults, and in the second generation of L3. The results showed that ABZs exposition during larvae development altered the expression of several ugt and pgp genes in L3 and adults. The intrageneration stability of ABZs-evoked changes was observed in the case of three genes, four genes maintained the intergeneration stability. Interestingly, ABZs-induced changes in the expression of some genes became apparent only in the second generation of L3. Taking together, contact of free-living stages of H. contortus with traces of ABZs in the environment evokes changes in the expression of certain UGTs and Pgps, with some of these changes being intra- and inter-generation stable.
Polymicrobial biofilms, the reason for most chronic wound infections, play a significant role in increasing antibiotic resistance. The in vivo effectiveness of the new anti-biofilm therapy is conditioned by the profound evaluation using appropriate in vitro biofilm models. Since nutrient availability is crucial for in vitro biofilm formation, this study is focused on the impact of four selected cultivation media on the properties of methicillin-resistant Staphylococcus aureus and Candida albicans dual-species biofilms. To reflect the wound environment, Tryptic soy broth, RPMI 1640 with and without glucose, and Lubbock medium were supplemented with different amounts of host effector molecules present in human plasma or sheep red blood cells. The study demonstrates that the Lubbock medium provided the most appropriate amount of nutrients regarding the biomass structure and the highest degree of tolerance to selected antimicrobials with the evident contribution of the biofilm matrix. Our results allow the rational employment of nutrition conditions within methicillin-resistant Staphylococcus aureus and Candida albicans dual-species biofilm formation in vitro for preclinical research. Additionally, one of the potential targets of a complex antibiofilm strategy, carbohydrates, was revealed since they are prevailing molecules in the matrices regardless of the cultivation media.
- MeSH
- antibakteriální látky farmakologie MeSH
- biofilmy * účinky léků růst a vývoj MeSH
- Candida albicans * účinky léků fyziologie MeSH
- kultivační média * farmakologie MeSH
- lidé MeSH
- methicilin rezistentní Staphylococcus aureus * účinky léků fyziologie MeSH
- mikrobiální testy citlivosti MeSH
- ovce MeSH
- živiny metabolismus MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Despite numerous studies on Escherichia coli (E. coli) from sheep, there have been few reports on the characterization of E. coli isolates from various organs of individual sheep until now. The present study conducted molecular typing, antibiotics resistance, biofilm formation, and virulence genes on E. coli isolated from 57 freshly slaughtered apparently healthy sheep carcasses, gallbladders, fecal samples, and mesenteric lymph nodes (MLNs). The results demonstrated that the detection rate of R1 LPS core type in E. coli isolated from fecal samples (70.83%) was higher than that from other organs, but the detection rate of antibiotic resistance genes was lower (P < 0.05). The predominant phylogenetic group of E. coli isolated from the carcasses was group B1 (93.33%), and the detection rate of multidrug-resistance phenotype (80%) and the resistance rate of E. coli was higher than that from other organs (P < 0.05). Interestingly, the intensity of biofilm formation of E. coli isolated from MLNs was higher than that from other organs (P < 0.05). However, except for ibeB, the detection rates of virulence genes did not differ in E.coli isolated from different organs. In conclusion, differences were noted in these parameters of E. coli isolated from different organs of individual sheep. Therefore, the data may contain considerable mistakes concerning the actual situation in the host if we only analyze the data of E. coli isolated from feces or carcasses.
- MeSH
- antibakteriální látky * farmakologie MeSH
- bakteriální léková rezistence genetika MeSH
- biofilmy * růst a vývoj účinky léků MeSH
- Escherichia coli * genetika účinky léků izolace a purifikace klasifikace fyziologie MeSH
- faktory virulence * genetika MeSH
- feces mikrobiologie MeSH
- fylogeneze MeSH
- infekce vyvolané Escherichia coli mikrobiologie veterinární MeSH
- molekulární typizace MeSH
- nemoci ovcí mikrobiologie MeSH
- ovce MeSH
- virulence genetika MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
The clinical consequences of toxoplasmosis are greatly dependent on the Toxoplasma gondii strain causing the infection. To better understand its epidemiology and design appropriate control strategies, it is important to determine the strain present in infected animals. Serotyping methods are based on the detection of antibodies that react against segments of antigenic proteins presenting strain-specific polymorphic variations, offering a cost-effective, sensitive, and non-invasive alternative to genotyping techniques. Herein, we evaluated the applicability of a panel of peptides previously characterized in mice and humans to serotype sheep and pigs. To this end, we used 51 serum samples from experimentally infected ewes (32 type II and 19 type III), 20 sheep samples from naturally infected sheep where the causative strain was genotyped (18 type II and 2 type III), and 40 serum samples from experimentally infected pigs (22 type II and 18 type III). Our ELISA test results showed that a combination of GRA peptide homologous pairs can discriminate infections caused by type II and III strains of T. gondii in sheep and pigs. Namely, the GRA3-I/III-43 vs. GRA3-II-43, GRA6-I/III-213 vs. GRA6-II-214 and GRA6-III-44 vs. GRA6-II-44 ratios showed a statistically significant predominance of the respective strain-type peptide in sheep, while in pigs, in addition to these three peptide pairs, GRA7-II-224 vs. GRA7-III-224 also showed promising results. Notably, the GRA6-44 pair, which was previously deemed inefficient in mice and humans, showed a high prediction capacity, especially in sheep. By contrast, GRA5-38 peptides failed to correctly predict the strain type in most sheep and pig samples, underpinning the notion that individual standardization is needed for each animal species. Finally, we recommend analyzing for each animal at least 2 samples taken at different time points to confirm the obtained results.
- MeSH
- antigeny protozoální * genetika imunologie MeSH
- ELISA metody MeSH
- genotyp MeSH
- nemoci ovcí * parazitologie diagnóza MeSH
- nemoci prasat * parazitologie diagnóza MeSH
- ovce MeSH
- peptidy imunologie MeSH
- prasata MeSH
- protilátky protozoální krev MeSH
- sérotypizace * metody MeSH
- toxoplazmóza zvířat * diagnóza parazitologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Coccidiosis is a protozoan intestinal disease that reduces the production of the sheep industry and causes large economic losses for sheep. Although chemically synthesised drugs are routinely employed to treat coccidiosis in sheep, the anticoccidial drug resistance and drug residues in edible meat have prompted an urgent search for alternatives. Herein, the anticoccidial properties of diclazuril, a conventional anticoccidial drug, and Allium sativum, Houttuynia cordata and Portulaca oleracea were assessed. Forty 45-day-old lambs naturally infected with Eimeria spp. were selected and randomly divided into five groups. The results showed that the sheep treated for coccidiosis had considerably decreased average daily gain (ADG) during both administration and withdrawal of the drug compared to the control group. Furthermore, at days 14, 21, 28 and 35, respectively, the three herbs and diclazuril had similar anticoccidial effects, with lower oocysts per gram (OPG) than the control group. On day 78, OPG in the three herbal groups was significantly lower than in the diclazuril group. In addition, the abundance and composition of the gut microbiota were changed in sheep treated with the three herbs and diclazuril compared to the untreated sheep. Moreover, some intestinal microorganisms have a correlation with OPG and ADG when using Spearman correlation analysis. In summary, our results suggest that all three herbs produce anticoccidial effects similar to diclazuril and modulate the balance of gut microbiota in growing lambs.
- MeSH
- Eimeria účinky léků fyziologie MeSH
- kokcidiostatika farmakologie aplikace a dávkování MeSH
- kokcidióza * veterinární farmakoterapie parazitologie MeSH
- léky rostlinné čínské farmakologie aplikace a dávkování MeSH
- nemoci ovcí * parazitologie farmakoterapie MeSH
- oocysty účinky léků MeSH
- ovce MeSH
- střevní mikroflóra * účinky léků MeSH
- triaziny farmakologie aplikace a dávkování MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
In an increasingly aging society, there is a growing demand for the development of technology related to tissue regeneration. It involves the development of the appropriate biomaterials whose properties will allow the desired biological response to be obtained. Bioactivity is strongly affected by the proper selection of active ingredients. The aim of this study was to produce bioactive hydrogel materials based on hyaluronic acid and collagen modified by the addition of placenta. These materials were intended for use as dressings, and their physicochemical properties were investigated under simulated biological environmental conditions. The materials were incubated in vitro in different fluids simulating the environment of the human body (e.g., simulated body fluid) and then stored at a temperature close to body temperature. Using an FT-IR spectrophotometer, the functional groups present in the composites were identified. The materials with the added placenta showed an increase in the swelling factor of more than 300%. The results obtained confirmed the potential of using this material as an absorbent dressing. This was indicated by pH and conductometric measurements, sorption, degradation, and surface analysis under an optical microscope. The results of the in vitro biological evaluation confirmed the cytosafety of the tested biomaterials. The tested composites activate monocytes, which may indicate their beneficial properties in the first phases of wound healing. The material proved to be nontoxic and has potential for medical use.
- MeSH
- biokompatibilní materiály farmakologie MeSH
- hojení ran MeSH
- hydrogely * farmakologie chemie MeSH
- kolagen farmakologie chemie MeSH
- kyselina hyaluronová * farmakologie chemie MeSH
- lidé MeSH
- ovce MeSH
- spektroskopie infračervená s Fourierovou transformací MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Tick-borne encephalitis virus (TBEV) is a major cause of neurological infections in many regions of central, eastern and northern Europe and northern Asia. In approximately 15% of cases, TBEV infections lead to the development of severe encephalitis or meningitis. The main route of TBEV transmission is tick bites; however, ingestion of dairy products from infected animals (goats, cattle and sheep) is also a frequent cause of the disease. Therefore, vaccination of livestock in virus endemic regions could also contribute to the decrease in TBEV infection among humans. Although few vaccines against TBEV based on inactivated viruses are available for humans, due to high costs, vaccination is not mandatory in most of the affected countries. Moreover, there is still no vaccine for veterinary use. Here, we present a characterization and immunogenicity study of a new potential TBEV vaccine based on virus-like particles (VLPs) produced in Leishmania tarentolae cells. VLPs, which mimic native viral particles but do not contain genetic material, show good immunogenic potential. For the first time, we showed that the protozoan L. tarentolae expression system can be successfully used for the production of TBEV virus-like particles with highly efficient production. We confirmed that TBEV recombinant structural proteins (prM/M and E) from VLPs are highly recognized by neutralizing antibodies in in vitro analyses. Therefore, VLPs in combination with AddaVax adjuvant were used in immunization studies in a mouse model. VLPs proved to be highly immunogenic and induced the production of high levels of neutralizing antibodies. In a challenge experiment, immunization with VLPs provided full protection from lethal TBE in mice. Thus, we suggest that Leishmania-derived VLPs may be a good candidate for a safe alternative human vaccine with high efficiency of production. Moreover, this potential vaccine candidate may constitute a low-cost candidate for veterinary use.
- MeSH
- klíšťová encefalitida * prevence a kontrola MeSH
- Leishmania * MeSH
- lidé MeSH
- myši MeSH
- neutralizující protilátky MeSH
- ovce MeSH
- protilátky virové MeSH
- skot MeSH
- virové vakcíny * MeSH
- viry klíšťové encefalitidy * genetika MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- myši MeSH
- skot MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Background: Hydatidosis is a deadly parasitic disease that affects both humans and animals. It has received much attention due to widespread health and economic concerns. Materials and Methods: Thirty-three hydatid cysts from the slaughterhouse and butcher shops were analyzed, 17 from the lung and 16 from the liver. The specimens were collected from hydatid fluid and grown on nutritional agar and MacConkey agar using a sterile loop. A Vitek- 2 compact instrument was used to identify bacteria. The viability of the protoscoleces was also determined in these hydatid cysts. Results: The secondary infection rate with bacteria in hepatic and pulmonary hydatid cysts was 24 (72.7%) from a total of thirty-three samples. Several types of bacteria have been isolated from hepatic and pulmonary hydatid cysts. Aeromonas hydrophila had the highest infection rate in hepatic and pulmonary hydatid cysts reaching 20.83% while the lowest infection rate was 4.17% for Leuconostoc mesenteriodes, Lactococcus garvieae, Staphylococcus sciuri, and Staphylococcus hominis, Streptococcus uberis, Pseudomonas stutzer and Vibro vulnificus. Staphylococcus lentus and Lactococcus garvieae had the highest effect on the viability of protoscoleces in liver and lung, reaching 0%, and 13% respectively. Eleven of a total of 13 types of bacteria isolated from hydatid cysts in the liver and lung: were diagnosed for the first time and had not previously been recognized by earlier investigation. The rates of bacterial infection in hepatic and pulmonary hydatid cysts were 76.47% and 68.75%, respectively. Conclusion: The results of our current study indicate that the secondary infection rate with bacteria in hepatic and pulmonary hydatid cysts reached (72.7%), and different types of bacteria in hepatic and pulmonary hydatid cysts have a clear effect on the viability of protoscoleces.
- Klíčová slova
- protoskolex,
- MeSH
- Bacteria izolace a purifikace klasifikace patogenita MeSH
- bakteriální infekce * mikrobiologie parazitologie patologie MeSH
- Echinococcus mikrobiologie růst a vývoj MeSH
- echinokokóza mikrobiologie MeSH
- klinické laboratorní techniky metody přístrojové vybavení MeSH
- mikrobiální viabilita MeSH
- ovce * mikrobiologie parazitologie MeSH
- statistika jako téma MeSH
- Publikační typ
- klinická studie MeSH
OBJECTIVES: Toxoplasma gondii is a widely prevalent protozoan parasite in human populations. This parasite is thought to be primarily transmitted through undercooked meat and contamination by cat feces. Here, we seek to determine if Toxoplasma gondii cysts can be found within human semen. METHODS: We used a mixture of histological and immunofluorescence stains to visualize Toxoplasma gondii cysts in thin smears of human semen. Further, we probed for presence of bradyzoite-specific mRNA transcription using in-situ hybridization. RESULTS: We visualized Toxoplasma gondii cysts in ejaculates of immune-competent and latently infected human volunteers. We confirmed the encystment by probing transcription of a bradyzoite-specific gene in these structures. These observations extend previous observations of the parasite in semen of several non-human host species, including rats, dogs, and sheep. CONCLUSIONS: Toxoplasma gondii infection is a clinically significant infection, in view of its high prevalence, its purported role in neuropsychiatric disorders such as schizophrenia, as well as in the more serious form of congenital toxoplasmosis. Our demonstration of intact Toxoplasma gondii cysts in the ejaculate supports the possibility of sexual transmission of the parasite and provides an impetus for further investigations.
- MeSH
- feces MeSH
- krysa rodu rattus MeSH
- lidé MeSH
- ovce MeSH
- psi MeSH
- sexuální chování MeSH
- sperma parazitologie MeSH
- Toxoplasma * genetika MeSH
- toxoplazmóza * parazitologie MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- lidé MeSH
- psi MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
BACKGROUND: The objective of this systematic review is to summarize the available animal models of ischemic limbs, and to provide an overview of the advantages and disadvantages of each animal model and individual method of limb ischemia creation. METHODS: A review of literature was conducted using the PubMed and Web of Science pages. Various types of experimental animals and surgical approaches used in creating ischemic limbs were evaluated. Other outcomes of interest were the specific characteristics of the individual experimental animals, and duration of tissue ischemia. RESULTS: The most commonly used experimental animals were mice, followed by rabbits, rats, pigs, miniature pigs, and sheep. Single or double arterial ligation and excision of the entire femoral artery was the most often used method of ischemic limb creation. Other methods comprised single or double arterial electrocoagulation, use of ameroid constrictors, photochemically induced thrombosis, and different types of endovascular methods. The shortest duration of tissue ischemia was 7 days, the longest 90 days. CONCLUSIONS: This review shows that mice are among the most commonly used animals in limb ischemia research. Simple ligation and excision of the femoral artery is the most common method of creating an ischemic limb; nevertheless, it can result in acute rather than chronic ischemia. A two-stage sequential approach and methods using ameroid constrictors or endovascular blinded stent grafts are more suitable for creating a gradual arterial occlusion typically seen in humans. Selecting the right mouse strain or animal with artificially produced diabetes or hyperlipidaemia is crucial in chronic ischemic limb research. Moreover, the observation period following the onset of ischemia should last at least 14 days, preferably 4 weeks.
- MeSH
- arteria femoralis * chirurgie MeSH
- ischemie * MeSH
- králíci MeSH
- krysa rodu rattus MeSH
- lidé MeSH
- modely nemocí na zvířatech MeSH
- modely u zvířat MeSH
- myši MeSH
- ovce MeSH
- prasata MeSH
- stenty MeSH
- teoretické modely MeSH
- zvířata MeSH
- Check Tag
- králíci MeSH
- krysa rodu rattus MeSH
- lidé MeSH
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
- systematický přehled MeSH
