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Resumen Introducción: la cucha de ojos azules (Panaquecochliodon) es una especie endémica de la cuenca del Cauca y el Magdalena. Sin embargo, no se tiene mucha información sobre esta especie, incluida la ausencia de un protocolo de sedación adecuado para el trabajo en cautiverio con esta especie. Objetivo: estandarizar un protocolo de sedación del P. cochliodon. Materiales y métodos: se evaluaron diferentes concentraciones del sedante Eugenol que iban desde 20 a 40 mg/L; se adoptaron 4 tipos de sedación y 5 tipos de recuperación, encontrando así los grados de sedación adecuados para los diferentes procedimientos de manejo en confinamiento que se realizaron con esta especie. Resultados: todos los ejemplares alcanzaron la sedación tipo 4 y la recuperación tipo 5 sin mortalidad. Significativamente la concentración a la cual los ejemplares demoraron más tiempo en alcanzar la sedación tipo 4 y recuperación tipo 5 fue la de 20 mg/L, las demás concentraciones no presentaron diferencias entre sí, pero indican una tendencia inversa con respecto a la concentración y el tiempo. Conclusiones: todas las concentraciones evaluadas son seguras para el manejo de P. cochliodon de 314±11,6 gr, no se presentó mortalidad; las concentraciones de 30 a 35 mg/L, ofrecen 2,6 minutos de trabajo, sin efectos deletéreos aparentes sobre la especie.
Abstract Introduction: the blue-eyed pleco {Panaque cochliodon) is a species endemic to the Cauca and Magdalena basin. However, not much information is available on this species, including the absence of an adequate sedation protocol for captive work with this species. Objetive: this research standardizes a sedation protocol for P. cochliodon. Materials and methods: for this purpose, different dosages and concentrations of the sedative Eugenol ranging from 20 to 40 mg/L were evaluated and 4 types of sedation and 5 types of recovery were adopted, thus finding the appropriate degrees of sedation for the different confinement management procedures that were performed with this species. Results: all specimens reached type 4 sedation and type 5 recovery without mortality. Significantly, the concentration at which the specimens took the longest time to achieve type 4 sedation and type 5 recovery was 20 mg / L, the other concentrations did not show differences between them, but indicate an inverse trend with respect to the concentration and experimental time. Conclusions: all the concentrations evaluated are safe for the management of P. cochliodon of 314 ± 11.6 gr, there was no mortality; concentrations of 30 to 35 mg / L, offer 2.6 minutes of work, without apparent deleterious effects on the species.
Resumo Introdução: o cascudo de olhos azuis {Panaquecochliodon) é uma espécie endémica da bacia do Cauca e Magdalena. Contudo, não há muita informação disponível sobre esta espécie, incluindo a ausência de um protocolo de sedação adequado para o trabalho em cativeiro com esta espécie. Objetivo: Esta investigação padronizou um protocolo de sedação para o P. cochliodon. Materiais e métodos: para tanto, foram avaliadas diferentes dosagens e concentrações do sedativo Eugenol variando de 20 a 40 mg/l e adotados 4 tipos de sedação e 5 tipos de recuperação, encontrando-se assim os graus de sedação adequados para os diferentes confinamentos procedimentos de manejo que foram realizados com esta espécie. Resultados: todos os espécimes alcançaram sedação tipo 4 e recuperação tipo 5 sem mortalidade. Significativamente, a concentração na qual as amostras demoraram mais tempo para atingir a sedação do tipo 4 e recuperação do tipo 5 foi de 20 mg/l, as demais concentrações não apresentaram diferenças entre si, mas indicam uma tendência inversa em relação à concentração e ao tempo. Conclusões: todas as concentrações avaliadas são seguras para o manejo de P. cochliodon de 314 ± 11,6 gr, não houve mortalidade; concentrações de 30 a 35 mg/l, oferecem 2,6 minutos de trabalho, sem efeitos deletérios aparentes para a espécie.
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Anesthesia reduces the handling process duration and prevent fish injuries. The anesthetic effect and ideal concentrations of eugenol and tricaine methanesulfonate (MS-222) were tested for pearl cichlid (Geophagus brasiliensis) juveniles with an average weight of 4.4 g in water at 24ºC. The criterion for determining the optimal dose considered an induction time of one minute. Experiment 1 tested the concentrations of 25, 75, 150 and 300 mg L-1 of eugenol. The best results were obtained at doses of 150 and 300 mg L-1. Experiment 2 aimed to establish a more accurate result by testing the concentrations of 180, 210, 240 and 270 mg L-1, and led to an estimation of 217 mg L-1 of eugenol to induce anesthesia in one minute. Experiment 3 evaluated 200, 300, 400, 500 and 600 mg L-1 of tricaine, of which the concentration of 294 mg L-1 was estimated to induce anesthesia in one minute. No significant differences were observed for recovery times when using either of the anesthetics. No mortality was observed within 24 hours after the experiments for any concentration of the anesthetics. The present study recommends 217 mg L-1 of eugenol or 394 mg L-1 of tricaine for anesthesia of the pearl cichlid.
Subject(s)
Animals , Anesthesia , Cichlids/physiology , Eugenol/chemistry , Mesylates/chemistryABSTRACT
Objective: To investigate the anti-methicillin-resistant Staphylococcus aureus (MRSA) activity of clove oil combined with quinolones antibiotics in vitro, and provide scientific evidences for the treatment of MRSA infection by clove oil combined with quinolones antibiotics. Methods: Minimal inhibitory concentrations (MICs) of clove oil and four quinolones antibiotics (moxifloxacin, levofloxacin, ciprofloxacin and norfloxacin) were determined by microdilution method; Fractional inhibitory concentration (FIC) indexes of clove oil combined with four quinolones antibiotics were determined by chessboard dilution method; Inhibition effect of MRSA by clove oil combined with four quinolones antibiotics was analyzed by growth curve method. MIC changes were analyzed when MRSA standard strain ATCC33591 was induced 30 generations with clove oil. Results: A total of 35 strains of MRSA isolated from clinical patients showed that the highest resistance rate was moxifloxacin (88.57%), followed by ciprofloxacin and levofloxacin (77.14%), and the lowest resistance rate was norfloxacin (74.29%). The results of FIC index analysis showed that the different thesynergistic action effects of clove oil with moxifloxacin, levofloxacin, ciprofloxacin and ornorfloxacin, were 42.86%, 37.15%, 34.28% and 34.28%, respectively; The additive effects of which were 28.57%, 25.71%, 22.86% and 42.86%, respectively; The unrelated effects of that were 28.57%, 20.00%, 42.86% and 22.86%, respectively. Among them, there was partial antagonism in experimental strains when combined with levofloxacin, accounting for 17.14%. The growth curve showed that the combination of clove oil and quinolone antibiotics had a significant synergistic inhibition on MRSA. The results of induced drug resistance test showed that MIC did not change after 30 generations of continuous induction with the clove oil, but increased to 16 times of that of ciprofloxacin under the same condition, which indicated that the clove oil was not easy to make MRSA resistant. Conclusion: Clove oil is not easy to produce drug resistance. They showed different interactions on each other when clove oil combined with quinolones antibiotics, and most strains of MRSA isolated from clinical patients had obvious synergistic and additive inhibition effect. The dosage of quinolones antibiotics could be cut when clove oil combined with quinolones antibiotics for treating MRSA infection.
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Objective To investigate the antimicrobial activities of clove oil alone and in combination with three kinds of β-lactam antibiotics (amoxicillin, cephalexin, and cefepime) against methicillin-resistant Staphylococcus aureus (MRSA). Methods The minimum inhibitory concentrations (MICs) of clove oil alone and in combination with three kinds of β-lactam antibiotics against two standard MRSA and 32 MRSA isolated from clinic were determined by 96-well plate micro-dilution method. The fractional inhibitory concentrations (FICs) of clove oil and three kinds of β-lactam antibiotics were determined by using the micro-chessboard method. The growth curve of MRSA ATCC43300 effected by clove oil or clove oil combined with cephalexin was analyzed. Results Clove oil showed significant anti-MRSA activity in vitro, with MIC of 0.25 mg/mL and 0.51 mg/mL. The FICs were mainly distributed in the range of ≤ 0.5 and 0.5 to 1, and the synergy rates were 58.8%, 97.0%, and 64.7%, when the clove oil was combined with amoxicillin, cephalexin and cefepime, respectively. Clove oil enhanced the activity of β-lactam antibiotics against MRSA significantly, and reduced the dosage of it. The growth curve showed that the clove oil significantly inhibited the growth of MRSA, and prolonged its lag phase. And the effect showed a significant dose-effect relationship. The growth of MRSA was nearly inhibited when 1/4 MIC cefepime combined with 1/4 MIC clove oil. Conclusion Clove oil not only could exhibit strong anti-MRSA activity itself, but could enhance the activity of β-lactam antibiotics against MRSA. Hence, clove oil would be a potential new drug, which can be used as a new drug for preventing and treating MRSA infection.
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Objective To study the effect of clove oil on bacterial biofilm of Streptococcus pneumoniae. Methods The components of clove oil were determined by GC-MS mass spectrometry. The suspension of streptococcus mutans was prepared to carry out the germicidal test, and to determine the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of clove oil. The effects of different concentrations of clove oil on the formation of biofilm were observed by laser confocal microscopy, and the average fluorescence intensity of live bacteria and dead bacteria in biofilm was recorded. Results Determination of clove oil 8 components were analyzed by GC-MS mass spectrometry method, most of the Eugenol content was 48.93%, followed by the Caryophyllene 20.78%, Methylis salicylas 14.96%. Through MIC, MBC and the experimental results showed that clove oil had antibacterial activity of Proteus, and with the increase of clove oil concentration, the inhibitory effect was better. When it reached a certain concentration, it can showed bactericidal effect that the MIC and MBC were 0.3125%, 0.6250%. The clove oil also had inhibitory effect on Streptococcus mutans biofilm with the concentration depedence. When the concentration of clove oil was 2.5000%, the average fluorescence intensity (live/dead bacteria) was 0.082 ± 0.007, the proportion of living bacteria decreased obviously, and biofilm disappeared. Conclusions The clove oil not only has inhibitory effect on Streptococcus mutants, but also can inhibit and clear the biofilm formation of Streptococcus.
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In the present study, Antimicrobial PVC films containing different amounts of clove oil as a plasticizer were prepared using traditional casting method. The physical and mechanical properties of the plasticized PVC membranes e.g. surface wettability were investigated. The increase of clove oil content demonstrated an increase in surface hydrophilicity and elongation to break the film. The thermogravimetric analysis revealed a decrease of polymer thermal stability by increasing clove oil concentration. The antibacterial activities against four different bacterial strains (two-gram positive: Staphylococcus aureus and Bacillus cereus & two-gram negative: Pseudomonas aeruginosa and Escherichia coli) were promoted by addition of clove oil. Although the natural source of clove oil, the bio-evaluation of plasticized membranes showed an increase in hemolysis percent (%) and thrombus weight. It can be concluded that the addition of clove to PVC need to further studies for applying in blood bags.
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Background: The objective was to evaluate and compare the effect of an extract of essential oil of clove with the standard sodium valproate on pentylenetetrazole (PTZ) induced seizures in animal models. Methods: A total of 30 mice were taken, they were given a chemo shock at the concentration of 60 mg/kg using PTZ. 30 mice were divided into 5 groups of 6 animals each the control group received distilled water 5 ml/kg i.p., standard received injection sodium valproate 200 mg/kg i.p. another group received sesame oil – 10 ml/kg i.p. (control), test groups received Clove oil - 0.075 ml/kg i.p., clove oil - 0.1 ml/kg i.p., respectively. All the injections were given 30 mins before the administration of PTZ. Results: Clove oil produced a significant antiepileptic effect at all the doses. Conclusion: Clove oil has shown significant antiepileptic activity in mice.
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Se presenta el caso clínico de una paciente que instaló edema pulmonar no cardiogénico, luego de la inyección intravenosa de eugenol requiriendo un tratamiento agresivo de soporte de las funciones vitales en una Unidad de Cuidados Intensivos.
It is presented the case of a patient, who developed a non-cardiogenic pulmonary edema, after the intravenous administration of eugenol, requiring aggressive supportive measures in an Intensive Care Unit.
Subject(s)
Humans , Female , Adult , Eugenol/toxicity , Pulmonary Edema/chemically induced , Self Medication/adverse effectsABSTRACT
Quorum sensing (QS) plays an important role in virulence, biofilm formation and survival of many pathogenic bacteria including Pseudomonas aeruginosa. This signalling pathway is considered as novel and promising target for anti-infective agents. In the present investigation, effect of the Sub-MICs of clove oil on QS regulated virulence factors and biofilm formation was evaluated against P. aeruginosa PAO1 and Aeromonas hydrophila WAF-38 strain. Sub-inhibitory concentrations of the clove oil demonstrated statistically significant reduction of las- and rhl-regulated virulence factors such as LasB, total protease, chitinase and pyocyanin production, swimming motility and exopolysaccharide production. The biofilm forming capability of PAO1 and A. hydrophila WAF-38 was also reduced in a concentration-dependent manner at all tested sub-MIC values. Further, the PAO1-preinfected Caenorhabditis elegans displayed an enhanced survival when treated with 1.6% v/v of clove oil. The above findings highlight the promising anti-QS-dependent therapeutic function of clove oil against P. aeruginosa.
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The aim of this study was to identify the time of anesthetic induction and recovery of silver catfish (Rhamdia quelen) exposed to eugenol. It was also determined the efficacy of the anesthetic as a stress reducing agent and performed a sensory analysis of the fillets from fish exposed to this substance. The silver catfish were exposed to air for 1min to carry out biometry, and blood was collected at 0, 1 and 4 hours later. Eugenol can be used in the range of 20-50mg L-1 for anesthetic induction in silver catfish, and recovery time from anesthesia was not affected by eugenol concentration. The control group showed significantly higher cortisol levels 4 hours after biometry than at time zero. Fish anesthetized with eugenol (50mg L-1) presented significantly lower plasma cortisol levels than control fish at the same time. These data indicate that eugenol inhibits the rise of cortisol in the blood. The sensory analysis test demonstrated that eugenol modifies the flavor of the fillet and therefore is contra-indicated for anesthetization of silver catfish that are intended for human consumption.
O objetivo deste estudo foi identificar o tempo de indução e recuperação anestésica de jundiás (Rhamdia quelen) expostos ao eugenol, bem como a eficácia desse anestésico na inibição do estresse e realizar análise sensorial dos filés dos peixes expostos a essa substância. Os jundiás foram expostos ao ar por um minuto para realização da biometria, e o sangue foi coletado zero, uma e quatro horas depois. O eugenol pode ser usado na faixa de 20-50mg L-1 para a indução da anestesia em jundiás, e o tempo de recuperação da anestesia não foi afetado pela concentração do eugenol. O grupo de controle mostrou níveis significativamente mais elevados do cortisol quatro horas após a biometria que no tempo zero. Os peixes anestesiados com eugenol (50mg L-1) apresentaram níveis significativamente mais baixos do cortisol plasmático do que peixes do grupo de controle do mesmo tempo. Esses dados indicam que o eugenol inibe o aumento do cortisol no sangue. O teste sensorial demonstrou que o eugenol modifica o sabor dos filés e consequentemente é contra-indicado para a anestesia do jundiá quando o filé for destinado ao consumo humano.
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Objective: To study the optimized technology of inclusion for the volatile oil of Caryophylli Flos with β-cyclodextrin polymer (β-CDP) microsphere. Methods β-CDP Microsphere was prepared by saturated peroxide solution. The study was carried out with uniform design to optimize the best inclusion processing conditions and inclusion compound was to characterize its structure. Results The best condition of the optimized technology of inclusion for the volatile oil of Caryophylli Flos with β-CDP microsphene was as follow: the volatile oil of Caryophylli Flos (mL)-β-CDP microsphere (g) was 1:1; inclusion temperature was 35°C; clathration time was 1 h; ethyl alcohol could be ignored. The package method is successful by characterizing structure. Conclusion: The inclusion compound of β-CDP has high rate and the inclusion process is reasonable and feasible.
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Antifungal activities of clove essential oil and its volatile vapour against dermatophytic fungi including Candida albicans, Epidermophyton floccosum. Microsporum audouinii, Trichophyton mentagrophytes, and Trichophyton rubrum were investigated. Both clove essential oil and its volatile vapour strongly inhibit spore germination and mycelial growth of the dermatophytic fungi tested. The volatile vapour of clove essential oil showed fungistatic activity whereas direct application of clove essential oil showed fungicidal activity.
Subject(s)
Candida albicans , Clove Oil , Epidermophyton , Syzygium , Fungi , Germination , Microsporum , Spores , TrichophytonABSTRACT
Objective To analyze the chemical components of clove oil before and after ?-cyclodextrin inclusion.Methods GC-MS conditions were as follows: DB-1 Capillary gas chromatographic column,programmed temperature rising from 60 ℃ to 230 ℃ at the rate of 10 ℃ /min;split ratio being 1 ∶ 50,Injector port temperature at 230 ℃,and Flame Ionization Detector(FID) temperature at 230 ℃.The components were detected by MS detector.Results GC-MS analysis showed that the main components of clove oil did not changed before and after inclusion,but the proportion of the components had been changed.Conclusion ?-cyclodextrin inclusion have effects on the proportion of clove oil components.