Bull Univ Agric Sci Vet Med Cluj-Napoca Horti. Additional studies are needed to clarify the roles of the different bacteria identified and the potential role of environmental factors on the disease process. granulomatoso para posteriormente ser reportada en Perú. As shown in Table 1, we identified an effective soil-plant transfer of Zn and Pb in the selected food chain (r = 0.76-0.93, 0.05 < p ≤ 0.001). Vibrios are ubiquitous in marine environments (1), and are part of the natural microbiota of aquatic invertebrates. <]/Prev 175889>>
Orstan A: A method to measure shell volumes. Esta situación condujo a la realización de un, diagnóstico en fresco y análisis histopatológico con, resultados positivos a la presencia de hepatopancreatitis, necrotizante en las dos camaroneras analizadas que. La necrosis del hepatopáncreas (NHP), es una severa, enfermedad provocada por varios agentes, según, estudios histopatológicos y ultraestructurales. The right tibia was broken manually in 56 rats weighing 100 g; the fracture was stabilized with an intramedullary steel wire. Pb concentration in environmental matrices (soil, nettle leaves, snail body). In Romania, it inhabits forests, gardens, vineyards, and open habitats that are confined to calcareous substrate. 2005, 138: 178-190. H & H a) Degeneración y atrofia de los túbulos; b) hipertrofia, infiltración intertubular de hemocitos y fibroblastos; c) atrofia severa de los túbulos y desprendimiento celular; d) necrosis multifocal y melanización; e) desprendimiento, celular severo, necrosis y formación multifocal de cápsulas envolviendo uno o más túbulos; f) encapsulamiento, material. las muestras resultaron negativas a NHP-B. Kim S. Cameron & Robert E. Quinn Onderzoeken en veranderen van organisatiecultuur Gebaseerd op het model van de concurrerende waarden QQuinn_2-boom_5e.indd 3uinn_2-boom_5e.indd 3 221-10-16 11:041-10-16 11:04 Clin Infect Dis 2003; 37:272-280. Finally, each sample volume was bring up to 50 mL with HNO3 0.5 N. Measurements of HM (Cu, Zn, Cd, Pb) concentrations in environmental matrices (soil, nettle leaves, snail foot, snail hepatopancreas) were carried out in the Environmental Research Test Laboratory, Banat`s University of Agricultural Sciences and Veterinary Medicine from Timisoara, Romania. Sample preparation. The percent of hepatopancreatic tubules containing NHPB in epithelial cells increased over time, representing bacteria multiplication and spread. Schlosser G, Stefanescu R, Przybylski M, Murariu M, Hudecz F, Drochioiu G: Copper-induced oligomerization of peptides: a model study. Ben-Haim Y, Thompson FL, Thompson CC, Cnockaert MC, Hoste B, Swings J et al. Susceptible animals were individually isolated in 41 of aerated artificial seawater at salinity 30 +/- 1 ppt and maintained in a water bath at 30 +/- 1 degree C for 60 d. A total of 120 individuals were exposed per os to a 0.05 g piece of NHPB-infected hepatopancreas and 100 controls were exposed to uninfected tissue. According to Sung et al (7), the establishment of vibriosis in cultured shrimp is associated with increased levels of pathogenic vibrios in the environment, though not necessarily for the total vibrio population. Van Khoa assisted the team. [ Links ], 6. El presente trabajo realiza una, comparación del resultado de los diagnósticos de NHP, realizados por histopatología convencional (tinción con, hematoxilina y eosina) y la reacción en cadena de la, polimerasa (PCR) para la identificación del agente causal, Durante el período comprendido entre los años 2005-2010, se realizaron 77 muestreos aleatorios simples en seis, granjas con cultivo semiintensivo del camarón, Se estudiaron como sospechosas de la enfermedad, las granjas con animales con signos clínicos indicativos, de NHP como: reducción del consumo diario de alimento, balanceado; tasa de crecimiento reducida, mortandad y, animales con cutícula blanda y cuerpos flácidos. 2001, Oxford: Oxford University Press. This group is also characterized by the biggest Euclidean distance to the other groups. Appl Microbiol 1975; 29:393-399. Environ Pollut. © 2020 BioMed Central Ltd unless otherwise stated. As a result, it was suggested that long-term exposure to Cd and Pb contaminated food may affect snail populations by decreasing snail size and delaying the maturation age because of increased detoxification effort. AHPNS was first classified as idiopathic because no specific causative agent had been identified. atrofia de los túbulos con células epiteliales hipertrofiadas, reducción marcada de los niveles de lípidos, severa infiltración, hemocítica intertubular en respuesta a la necrosis y a la, citólisis, presencia de túbulos necróticos, melanizados, rodeados de una fuerte reacción inflamatoria, formación de, nódulos hemolíticos con agregados bacterianos en su centro, A nivel celular, el epitelio columnar de los túbulos. HM pollution of the soil is often less visible and direct than other types of land pollution (e.g., garbage, refuse, littering), but its effects on terrestrial ecosystems and humans are long-lasting and severe [5]. Bacterial isolation from the experimentally infected shrimp enabled recovery of the same bacterial colony type found in field samples. The snail hepatopancreas proved to be extremely sensitive to HM traces from soil and have frequently accumulated several times higher amounts of Cu, Zn, and Cd than in lower trophic levels (soil and nettle); therefore, this organ can be used for tracking HM bioavailability in soil. Bordean D-M, Gergen I, Pîrvu D, Gogoasa I, Pirvulescu L: Studies concerning heavy metal pollution in Banat area. Sci Total Environ. Infections by multiple species of bacteria occurred in hepatopancreatic epithelial cells of cultured Pacific white shrimp (Penaeus vannamei). Syst Zool. Los resultados muestran que los métodos utilizados son sensibles y eficaces para realizar el diagnóstico definitivo de la enfermedad, pero que en todos los casos deben realizarse ambas pruebas para identificar con certeza al agente causal de la epizootia. Comparación de resultados positivos a NHP por diferentes métodos diagnósticos. [ Links ], 3. Vibrio colonization of the digestive tract of aquatic organisms can be beneficial to the host. (Ben Tre Province, Viet Nam) showing normal E-cells: (Ben Tre Province, Viet Nam) showing lumen, normal, (Ben Tre Province, Viet Nam) showing normal developing, Histology sections of normal hepatopancreas of, , acute phase. representaban el 33,3 % de las existentes en el país. Bordean D-M, Dragomirescu M, Nicula M, Butnariu M, Goian I, Gergen I: Study of lead and cadmium content in soil, water and plants in Freidorf areea. Durante los últimos años, se ha incrementado la incidencia de infecciones que lesionan el hepatopáncreas de los camarones, atacando en diferentes etapas de desarrollo de los cultivos y con diferentes grados y tipos de severidad. Oecologia. Las lesiones histológicas observadas en hepatopáncreas, de los casos positivos del período 2009-2010 coinciden. This study also aimed to identify the putative effects of HM accumulation in the environment on phenotypic variability in selected shell features, which included shell height (SH), relative shell height (RSH), and whorl number (WN). levels of Cu, Zn, Cd, and Pb were systematically lower than in snail body [21]. Ante ello, el análisis histopatológico del estado de salud de los camarones cobra gran relevancia. Chemical analyses were performed separately on each trophic compartment (soil, nettle leaves, snail). 2005, 289: R1185-R1195. Moreover, highly significant differences were found when comparing accumulation of each HM in snail hepatopancreas with that in foot (Cu, Zn, Cd, Pb: p < 0.001). After defrosting, the whole soft body was removed from the shell and the viscera and the foot were separated. Cholera and other types of vibriosis: a story of human pandemics and oysters on the half shell. ing through training courses on risk analysis for aquatic animal movement, farm-level biosecurity and surveillance. Notten MJ, Oosthoek AJ, Rozema J, Aerts R: Heavy metal concentrations in a soil-plant-snail food chain along a terrestrial soil pollution gradient. Firstly we aimed to find which of the shell main conchological features, shell height (SH) or shell weight (SW), allows a more accurate estimation of shell volume. Necrotizing Hepatopancreatitis (NHP) is a severe disease of cultivated penaeid shrimp caused by a pleomorphic, gram-negative, intracellular rickettsia-like bacterium. The Roman snail (Helix pomatia Linnaeus, 1758) is a common East and Central European snail species of the family Helicidae. Examination by scanning and transmission electron microscopy revealed heavy cytoplasmic infections by three forms of microorganisms: (1) a rickettsia-like bacterium, (2) a helical form of a mollicute-like bacterium, and (3) a filamentous mollicute-like bacterium. Kerney MP, Cameron RAD: A field guide to the land snails of Britain and northwestern Europe. 10.1007/s001289900108. en Cuba y que produce grandes pérdidas económicas. In order to identify the presence of NHP without having to dissect the animal, we developed a PCR-based method using fecal samples as the DNA source. 10.1890/1540-9295(2007)5[253:WNEM]2.0.CO;2. Emsley J: Nature's building blocks: an A-Z guide to the elements. Las columnas con la abreviatura CP contienen producto, amplificado correspondiente al control positivo del kit IQ, 2000 con banda de 325 pb, mientras que en la identificada, como CN se utilizó agua en vez de ADN. Palaeontol Electron. Identificación etiológica, por métodos histopatológicos y moleculares en el camarón, Necrotizing hepatopancreatitis (NHP). Four experiments were carried out to compare the nutritional indices of expeller processed mustard cake (MS) with that of groundnut cake (GN). Hepatopancreatitis necrotizante (NHP). Both studies investigated HM accumulation in a soil-nettle-snail food chain. Access scientific knowledge from anywhere. SUMMARY: In decapod crustaceans, the digestive gland is concerned with the digestion, absorption of nutrients, the storage of reserves and excretion. ND. RJAS. Negative-stain transmission electron microscopy revealed pleomorphic bacteria, most of them ovoid or rod-shaped (0.2 μm wide and 0.6-0.9 μm long), and a helical form demonstrating seven to twelve spiral turns (0.23 μm wide and 2.43-5.27 μm long). Biol J Linn Soc. In, Pantoja, C. (2003). Agarwal SK: Heavy metal pollution. Nevertheless, the sensitivity of Helix pomatia as bioindicator organism depends on the investigated body parts. 2003, 55: 607-630. Statistical analyses were performed by using Statistica 10 [57] and Past [58] software packages. In 2011, a more descriptive name for the acute phase of the disease was proposed as acute hepatopancreatic necrosis syndrome (AHPNS). Immersion challenge tests were employed for infectivity studies, which induced 100% mortality with typical AHPNS pathology to experimental shrimp exposed to the pathogenic agent. Durante el transcurso de ese mismo mes se, sospechó la presencia de la enfermedad en la sala de, maduración del Centro de Producción de Postlarvas, Yaguacam. 0000004916 00000 n
Such discrepant results were attributed to different selectivity in choice of food exhibited by these species of land snails and by different bioavailability of HMs in investigated food chains. Interestingly, except for sites THM5, THM7, and THR, the hepatopancreatic and the foot Pb levels were lower than in the nettle leaves (Figure 4). Results obtained in Fisheries Research Center (CIP, for Spanish abbreviations) from shrimp farms between 2005-2010 years were used because some pathological signs and symptoms are commons for different bacterial infections. Ecotoxicol Environ Saf. Studying HM transfer in a soil-nettle-snail food chain in the Biesboch area, moderate correlations (r = 0.41 – 0.64, 0.05 < p < 0.001) were found for all HMs in adult Cepaea nemoralis (whole body, excluding shell), except for Cu-Cu interactions between snail and soil (p > 0.05) [22]. Negative results were obtained from uninfected shrimp and shrimp infected with Vibrio spp., as well as DNA extracted from Brucella abortus, Ehrlichia risticii, Salmonella enteritidis, Agrobacterium tumefaciens and Streptococcus criae. Thus, the objective of the present study was to evaluate the vibrio sp., microbiota of apparently healthy shrimp farmed in Ceará (Northeastern Brazil) by isolating, identifying and quantifying (MPN) vibrios found in the hepatopancreas. with a set of dichotomous keys. [Accessed on: 10 Julio 2010]. Udang merupakan salah satu komoditas unggulan nasional dan memiliki nilai ekonomi yang tinggi. J World Aquac Soc 2006; 41:76-83. Only the hepatopancreas (excluding kidney, heart, gonad, and albumen gland) and the foot were studied in this work because these organs are most often reported as the main sites of metal accumulation and storage in snails [20, 41]. Thus, smaller shells were reported for snails inhabiting more polluted habitats [44–46]. The shrimp farmed in tanks were collected with nets and transported live in 30-L containers with culture water. Long-term Cd and Pb uptake via vegetation ingestion is assumed to be associated with smaller shells and higher whorl numbers. In contrast, the method used in this study (MPN) does not provide a direct bacterial count, but determines the density of viable microorganisms in the sample and is therefore indicated for samples with an expected bacterial concentration of less than 10 UFC g-1 (14). 2004, 334–335: 9-13. [ Links ], 10. Summary Hepatopancreas diseases in marine shrimp cultured in the Americas and its differential diagnosis by histopathology Shrimp farming in the Americas has been affected by outbreaks of several pathogens. Current protocols in molecular biology / edited by Frederick M. Ausubel ... [et al.]. Although ME content and nitrogen absorption of MS were lower than GN its feeding value was similar when growth and food conversion were compared. J. %%EOF
2004, 129: 409-419. The study included 75 adult shrimp (Litopenaeus vannamei) cultured at the Center for Research on Coastal Environments (CEAC/Labomar/UFC) in the state of Ceará, Northeastern Brazil. University of Arizon, USA. We are grateful for the anomymous reviewers’ constructive comments and recommendations, which increased the quality of the present article. Although the measured values were slightly higher in hepatopancreas, the Cu and Pb levels in the snail body usually varied within the same range (Figure 1, 4). 2010, 408 (19): 4165-4169. ResearchGate has not been able to resolve any citations for this publication. Pb and Cd are toxic, persistent, and non-biodegradable in the environment, and hence, they can be easy bioaccumulated and biomagnified along terrestrial food chains [5]. Tome VIII. Hence, AHPNS has a bacterial etiology and Koch's Postulates have been satisfied in laboratory challenge studies with the isolate, which has been identified as a member of the Vibrio harveyi clade, most closely related to V. parahemolyticus. The relationship between weight and microbiota of Vibrio in shrimp hepatopancreas has been reported by Soto Rodríguez et al (9). According to our results, WN was strongly positively correlated with both Cd and Pb levels in nettle leaves (Cd: r = 0.84, p < 0.01; Pb: r = 0.81, p < 0.01), but displayed no significant relationships with Cu and Zn concentrations in the leaf compartment (Cu: p = 0.058; Zn = 0.059), which has not been reported yet. Sawabe et al (5) suggests that the populations of V. halioticoli present in the intestines of different species of abalone contribute to nourish the host by fermenting algal polysaccharides, converting alginic acid into acetic acid. In contrast, Pb decreased when going up into the food chain. San Francisco: Freeman and Company. All rights reserved. En sus resultados a los seis días postinfección el, 33,3 % de los animales analizados resultaron positivos al, diagnóstico histopatológico, mientras que los primeros, resultados positivos por PCR y PCR en tiempo real se, obtuvieron a los 16 días, confirmando la correspondencia, en el diagnóstico de NHP-B en el camarón de cultivo. Fecal, samples as DNA source for the diagnosis of, Frelier, P. F., Loy, J. K., Lawrence, A. L., Bray, W. A. Setiap tubulus memiliki lumen pada bagian tengahnya dan dibatasi oleh epitel, Internal anatomy of the decapoda: an overview A handbook of normal shrimp histology. Several severe epizootics of commercially grown L. vannamei occurred during the study period and the mortality was attributed to NHPB infection. Zn, Cd, and Pb appear to interfere with each other in primary producers and consumers, although this might be attributable to close association in background soils of the eight sites examined here. Front Ecol Environ. Histologic and ultrastructural examination of shrimp from the four sites demonstrated two morphologically distinct, Gram-negative, double-enveloped, intracytoplasmic bacteria in necrotic hepatopancreatic epithelium. The first histologic indication of conduction cells was seen in the hearts of 15-day embryos. Handbook of ecotoxicology Volume 1. 0000002491 00000 n
Our investigations revealed significant differences in HM accumulation in nettle leaves at sampling sites (Cu, Zn, Cd, Pb: p < 0.01). The dendrogram (Figure 5) shows the results obtained from using hierarchical cluster analysis and squared Euclidean distance as a criterion of similarity. 1995, 83: 123-145. Julio-diciembre, 2011, vol. in thickness, were stained with: (a) the periodic acid-Schiff technic of McManus with hematoxylin counterstain and salivary 0
Legend. The snails were collected, during May 2011, from eight locations in the Banat area, Romania (Timis and Caras-Severin counties), as shown in Figure 6. necrótico conteniendo agregados bacterianos en el centro. starting in one pond in one, location and subsequently spreading to several ponds, within the farm, followed by spread in neighbouring, affected. En, el 2007 con la adquisición de los kit IQ-2000 para NHP-B, se llevo a cabo la confirmación de los diagnósticos, realizados, con resultados positivos en todos los casos, evaluados con diferentes niveles de infección. Thermal shock was used as euthanasia technique by immersion in a mixture of water and ice (6:1) during 10 minutes. Using PCR and microbiological analyses, other etiologic agents, such as white spot syndrome virus, infectious hypodermal and hematopoietic necrosis virus, hepatopancreatic parvovirus and vibriosis, were ruled out as contributory factors. Therefore, all locations have been exposed for at least 30 years to industrial pollution, and were located within a 10 km-radius of former and/or actual major sources of contamination (see Table 3). [ Links ], 20. 53 0 obj
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The PCR amplification products from the clinical specimens were compared to the PCR amplification product obtained from a sucrose-gradient purified sample of bacteria that was previously used to reproduce NHP. Se consideró una muestra positiva si hay una banda, de 325 pares de bases y negativa si esta no está y hay, un control interno de 848 pares de bases, correspondiente, La primera sospecha de la presencia del NHP estuvo, caracterizada clínicamente por la marcada reducción en, el consumo de alimento, letargia, cutícula blanda, cuerpos, flácidos y expansión de cromatóforos con pleópodos y, urópodos de coloración oscura, animales agrupados en, la orilla de los estanques muertos o moribundos, proceso, que se observó en noviembre de 2005 en la granja, (Cultisur). The enchondral bone formation started close to the periosteal callus from which vessels were piercing into the then hypertrophic and mineralized chondrocytes on Day 11. Three major developmental stages of the disease were characterized based on the extent and number of hepatopancreatic tubular epithelial cells containing bacteria, the degree of tubular interstitial inflammation, and the extent and chronicity of tubular necrosis. URL Available at: http://www.fda.gov/Food/ScienceResearch/LaboratoryMethods/BacteriologicalAnalyticalManualBAM/ucm109656.htm#authors. Measured values for SH and SW were normally distributed (Shapiro-Wilcoxon test, p > 0.05). Microbiota of Vibrio sp. These differences were explained by the different level and history of HM exposure. The fracture with its surrounding musculature was dissected out and immediately frozen to -70 degrees C. Cryostat sections of the fracture region were stained with hematoxylin/eosin, toluidine blue, and immunoenzymatically with, Due to the small size of the mouse, evaluating its clinical phenotype is sometimes problematic. Vibrios were quantified with the MPN method (MNP.g-1), following the recommendations of Kaysner and DePaola Jr (10). Detection of the etiologic agent of necrotizing. Ibarra, J. C., Galavíz, L. S. & Molina, Z. J. Results. Aquaculture 2003; 219:671-679. Fortaleza-Ceará, Brazil. Recent studies occasionally revealed significant Cu, Zn, Cd, and Pb levels in air, soil, water, and vegetation in Timisoara and the neighbouring areas [19]. The ash was dissolved in 20 mL of 0.5 N HNO3 and filtered through ash-free filter paper before analysis. [ Links ], 8. and hepatopancreas, 10 animals were injected with India ink via the stomach in order to label the circulation of the fluids inside the hepatopancreas. En el presente trabajo se realizó una comparación de los resultados de las técnicas histológicas convencionales con tinción (E & H) y la reacción en cadena de la polimerasa (PCR) para la identificación de la (NHP) en Cuba, utilizando como datos los resultados obtenidos en el CIP en los muestreos realizados en las granjas de cultivo durante el período 2005-2010, pues algunos signos presentes en esta patología son comunes para diferentes infecciones bacterianas. Eosina & Hematoxilina de Meyer-Bennett (E & H). Similarly, it was determined whether HM accumulation in snail body varied between the snail foot and hepatopancreas (Kruskal-Wallis one-way ANOVA, df = 7,17). 0000003641 00000 n
[ Links ], 15. Para el diagnóstico de esta patología han sido, con sondas de ADN específicas y la reacción en cadena de la, con sondas de ADN específicas así como la. Besides the persistent organic pollutants, heavy metal (HM) accumulation in air, soil, water, and biota is increasingly becoming a global problem with the development of industry, mining activity, application of sewage sludge, and irrigation of waste water [2]. https://doi.org/10.1186/1752-153X-6-55, DOI: https://doi.org/10.1186/1752-153X-6-55. Washington DC: American Public Health Association. reducida solamente en los camarones que fueron alimentados con las dietas suplementadas con 1000 y 2000 g kg–1 AT. Sung HH, Hsu SF, Chen CK, Ting YY, Chao W-L. The data were then normalized by decimal logarithmation (Shapiro-Wilcoxon test, df = 1,23). 47 0 obj
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Vibrios from the hepatopancreas of fifteen samples of five specimens each, of apparently healthy Pacific white shrimp (Litopenaeus vannamei) were isolated, identified and quantified. pathogenic for shrimp. startxref
Privacy 10.1016/j.scitotenv.2010.05.028. Los camarones fueron procesados indistintamente, para la aplicación de las técnicas histopatológica y de. Freshwater snail Bulinus globosus. However, little information is available concerning the bioaccumulation and the biomagnification of these HMs in terrestrial ecosystems in Romania, particularly in Banat region. Sawabe T, Setoguchi N, Inoue S, Tanaka R, Ootsubo M, Yoshimizu M et al. However, heightened Cd levels at sites THM1, THM5 and THM6 (Figure 3) are expected to raise serious environmental concerns if their level in the near future reaches ATV value. J Molluscan Stud. ERIC PCR dapat membedakan strain bakteri yang berkerabat dekat, prosedur kerja yang sederhana, cepat dan murah. The metal concentrations in the filtrate were determined by flame atomic absorption spectrophotometry with high resolution continuum source (Model ContrAA 300, Analytik Jena, Germany), fitted with a specific conditions of particular metal, and they were expressed as miligram per kilogram dry weight (mg kg-1 d.w.). Light microscopy (wet mounts and hematoxilin-eosin-stained sections of hepatopancreas) showed atrophy of the hepato- pancreas, strangulation and necrosis of the hepatopancreatic tubules, with masses of NHPB within the tubular epithelium, hemocytic infiltrates and tubular melanization. After the re-acclimation period, there was no reestablishment of the functional cytology. Los hallazgos del presente estudio sugieren que, incluso en ausencia de síntomas de la vibriosis, la microbiota de lo hepatopáncreas del camarón de cultivo puede incluir vibrios sacarosa positivos y negativos. Samples of Pacific white shrimp (Penaeus vannamei) were collected during 1986, 1987, and 1990 from three farms and an experimental mariculture facility with histories of production loss and increased mortality rates. Necrotizing hepatopancreatitis (NHP) is a severe bacterial disease that was previously identified solely in cultured Penaeus vannamei, the Pacific white shrimp, from Texas (USA). All authors read and approved the final manuscript. Am J Physiol Regul Integr Comp Physiol. The rod-shaped rickettsia (900 nm long by 300 nm wide) appeared to be free in the cytoplasm and had both a plasma membrane and a cell wall.
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