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Dadar M, Bahreinipour A, Alamian S, Yousefi AR, Amiri K, Abnaroodheleh F. Serological, cultural, and molecular analysis of Brucella from Buffalo milk in various regions of Iran. Vet Res Commun 2024; 48:427-436. [PMID: 37812358 DOI: 10.1007/s11259-023-10228-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/30/2023] [Indexed: 10/10/2023]
Abstract
Brucellosis is a significant infection that causes abortion, decreased milk production, and sterility in livestock, which greatly affects the industry. This study aimed to determine the prevalence of Brucella in buffalo milk samples across various regions of Iran, utilizing serological, molecular, and cultural analyses. A total of 1860 buffalo milk samples were collected from industrial, semi-industrial, and traditional buffalo farms in four major buffalo breeding provinces. The milk ring test agglutination test (MRT) was initially conducted on all milk samples, followed by culture and molecular testing for positive and negative samples in MRT. The study revealed positive results for the presence of Brucella DNA in various provinces of Iran. The MRT had a relatively low sensitivity, with results ranging from 0 to 0.7% in different provinces. However, the AMOS PCR method showed a significantly higher presence of Brucella DNA, ranging from 13 to 46% in these provinces. The highest abundance of Brucella bacterial DNA was found in Ardabil province, while the lowest was in West Azerbaijan province. Brucella abortus was the most commonly detected bacteria, followed by Brucella melitensis. Interestingly, the B. abortus vaccine strain RB51 was detected in 26.3% of positive samples of B. abortus. The culture assay of milk samples further confirmed the presence of B. melitensis biovar 1 in one sample from Khuzestan province. Overall, the study emphasizes that the AMOS PCR method is the most sensitive in detecting Brucella-exposed milk, while the sensitivity of milk sample culture and MRT is relatively lower.
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Affiliation(s)
- Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
| | | | - Saeed Alamian
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Ali Reza Yousefi
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Karim Amiri
- Iranian veterinary organization, Tehran, Iran
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A Retrospective Study of Viral Molecular Prevalences in Cats in Southern Italy (Campania Region). Viruses 2022; 14:v14112583. [PMID: 36423192 PMCID: PMC9699332 DOI: 10.3390/v14112583] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
From 2019 to 2021, a retrospective molecular study was conducted in the Campania region (southern Italy) to determine the prevalence of viral diseases in domestic cats. A total of 328 dead animals were analyzed by Real-Time PCR for the presence of feline panleukopenia virus (FPV), feline leukemia virus (FeLV), feline enteric coronavirus (FCoV), rotavirus (RVA), feline herpesvirus type 1 (FHV-1), and feline calicivirus (FCV). The possible presence of SARS-CoV-2 was also investigated by Real-Time PCR. The cats included in this study were specifically sourced and referred by local veterinarians and local authorities to the Zooprofilactic Experimental Institute of Southern Italy (IZSM) for pathological evaluation. The samples consisted of owners, catteries, and stray cats. Results revealed: 73.5% positive cats for FPV (189/257), 23.6% for FeLV (21/89), 21.5% for FCoV (56/266), 11.4% for RVA (16/140), 9.05% for FeHV-1 (21/232), and 7.04 for FCV (15/213). In contrast, SARS-CoV-2 was never detected. FPV was more prevalent in winter (p = 0.0027). FCoV FHV-1, FCV, and RVA predominated in autumn, whereas FeLV predominated in summer. As expected, viral infections were found more frequently in outdoor and shelter cats than in indoor ones, although no statistical association was found between animal lifestyle and viral presence. The study showed a high prevalence of FPV, FeLV, and FCoV and a moderate prevalence of RVA, FHV-1, and FCV. Moreover, the prevalence of these pathogens varied among the cat populations investigated.
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Involvement of herpesviruses in cases of abortion among water buffaloes in southern Italy. Vet Res Commun 2022; 46:719-729. [DOI: 10.1007/s11259-022-09887-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 01/12/2022] [Indexed: 10/19/2022]
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Dadar M, Tiwari R, Sharun K, Dhama K. Importance of brucellosis control programs of livestock on the improvement of one health. Vet Q 2021; 41:137-151. [PMID: 33618618 PMCID: PMC7946044 DOI: 10.1080/01652176.2021.1894501] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 01/14/2021] [Accepted: 02/20/2021] [Indexed: 12/21/2022] Open
Abstract
Brucellosis not only represents an important health restraint on livestock but also causes high economic losses in many developing countries worldwide. Despite considerable efforts made for the control of brucellosis, the disease is still spreading in many regions (such as the Middle East) where it represents one of the most important health hazards impacting both animals and humans. The present review aims to investigate the efficacy of veterinary control programs regarding brucellosis, with a special focus on current prevention, control, and eradication approaches. The reasons for unsuccessful control programs such as the absence of highly effective vaccines and non-certified bulls are also debated, to understand why the prevalence of brucellosis in livestock is not decreasing in many areas despite considerable efforts taken to date. The importance of governmental and regional investment in brucellosis control remains one of the main limiting factors owing to the limited budget allocated to tackle this disease. In this context, one health concept has generated novel comprehensive approaches with multiple economic implications across the livestock industry and public health. However, the implementation of such global preventive strategies appears to be a key issue for many endemic and low-income countries. According to the collected data, epidemiological contexts including management and trade systems along with well-defined agro-ecological zones should be evaluated in brucellosis endemic countries to improve milk production and to enhance the sustainability of the livestock sector at both national and regional levels.
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Affiliation(s)
- Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
| | - Ruchi Tiwari
- Department of Veterinary Microbiology and Immunology, College of Veterinary Sciences, UP Pandit Deen Dayal Upadyaya Pashu Chikitsa Vigyan Vishwavidyalya Evam Go-Anusandhan Sansthan (DUVASU), Mathura, Uttar Pradesh, India
| | - Khan Sharun
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
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Amoroso MG, Di Concilio D, Langellotti AL, Martello A, Cioffi B, Suffredini E, Cozzi L, Russo V, Mauriello G, Di Pasquale S, Galiero G, Fusco G. Quantitative Real-Time PCR and Digital PCR to Evaluate Residual Quantity of HAV in Experimentally Depurated Mussels. FOOD AND ENVIRONMENTAL VIROLOGY 2021; 13:329-336. [PMID: 33730340 DOI: 10.1007/s12560-021-09470-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 02/27/2021] [Indexed: 06/12/2023]
Abstract
Kinetics of hepatitis A virus (HAV) accumulation and depuration from mussels (Mytilus galloprovincialis) was studied in an experimental depuration system. Different parameters likely to influence the rate of virus accumulation and elimination were evaluated. Analyses were carried out by both real-time RT-qPCR and digital PCR. Results demonstrated that the animals start to concentrate the virus already after one hour and reach the maximum level of contamination in 6 h of experiment. With respect to depuration, HAV showed a rapid reduction of the concentration (89%) during the first 24-48 h of experiment and a very slow virus decrement in the following days with a 1% residual RNA at the ninth day of depuration. When process parameters likely to increase the depuration rate (presence of ozone, microalgal feeding, presence of lactic bacteria, pre-treatment with digestive enzymes) were tested, no significant differences in the kinetics were observed. Only treatment with pancreatin seemed to positively affect depuration in the first two days of the experiment.
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Affiliation(s)
- Maria Grazia Amoroso
- Unit of Virology, Department of Animal Health, Zooprofilactic and Experimental Institute of Southern Italy, Via Salute n. 2, Portici (Naples), Italy.
| | - Denise Di Concilio
- Unit of Virology, Department of Animal Health, Zooprofilactic and Experimental Institute of Southern Italy, Via Salute n. 2, Portici (Naples), Italy
| | - Antonio Luca Langellotti
- CAISIAL-Aquaculture division, University of Naples Federico II, Via Università n.133, Portici (Naples), Italy.
| | - Anna Martello
- CAISIAL-Aquaculture division, University of Naples Federico II, Via Università n.133, Portici (Naples), Italy
| | - Barbara Cioffi
- Unit of Virology, Department of Animal Health, Zooprofilactic and Experimental Institute of Southern Italy, Via Salute n. 2, Portici (Naples), Italy
| | - Elisabetta Suffredini
- Dipartimento Di Sicurezza Alimentare, Istituto Superiore Di Sanità, Nutrizione E Sanità Pubblica Veterinaria, Rep. Sicurezza Alimentare E Malattie Trasmesse Dagli Alimenti, Viale Regina Elena n. 299, Rome, Italy
| | - Loredana Cozzi
- Dipartimento Di Sicurezza Alimentare, Istituto Superiore Di Sanità, Nutrizione E Sanità Pubblica Veterinaria, Rep. Sicurezza Alimentare E Malattie Trasmesse Dagli Alimenti, Viale Regina Elena n. 299, Rome, Italy
| | - Valeria Russo
- Department of Veterinary Medicine, University of Naples Federico II, Via Delpino n. 2, Naples, Italy
| | - Gianluigi Mauriello
- Department of Agriculture, University of Naples Federico II, Via Università n.133, Portici, Naples, Italy
| | - Simona Di Pasquale
- Dipartimento Di Sicurezza Alimentare, Istituto Superiore Di Sanità, Nutrizione E Sanità Pubblica Veterinaria, Rep. Sicurezza Alimentare E Malattie Trasmesse Dagli Alimenti, Viale Regina Elena n. 299, Rome, Italy
| | - Giorgio Galiero
- Unit of Virology, Department of Animal Health, Zooprofilactic and Experimental Institute of Southern Italy, Via Salute n. 2, Portici (Naples), Italy
| | - Giovanna Fusco
- Unit of Virology, Department of Animal Health, Zooprofilactic and Experimental Institute of Southern Italy, Via Salute n. 2, Portici (Naples), Italy
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Rahimi H, Tukmechi A, Rashidian E. Use of touch-down polymerase chain reaction to enhance the sensitivity of Brucella melitensis detection in raw milk. Anim Biotechnol 2020; 33:104-109. [PMID: 32522080 DOI: 10.1080/10495398.2020.1777149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Brucellosis is a highly contagious bacterial zoonotic infectious disease severely affecting the public health and economic features of endemic and non-endemic countries. The present study assessed the potentials of using the touch-down polymerase chain reaction (TD-PCR) compared to the conventional PCR and culture methods in order to detect Brucella melitensis in raw milk samples of 55 sheep and 45 goats through deriving the primers from the omp31 element of the Brucella genome. In addition, nine isolates of B. melitensis were identified using the culture method. No positive cases were found in sediment samples, while the fatty tap layer test by conventional PCR and TD-PCR revealed 6 and 16 positive samples, respectively. Based on the survey of the limits of detection by TD-PCR and conventional PCR, TD protocol had a detection threshold of three logs higher than the conventional protocol under the experimental condition. The developed protocol of this study was highly sensitive and extremely fast. Therefore, this TD-PCR protocol could detect even a very low number of bacteria in milk samples. To our best knowledge, this is the first report on the use of the TD-PCR method to identify B. melitensis in milk.
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Affiliation(s)
- Heidar Rahimi
- Faculty of Veterinary Medicine, Department of Microbiology, Urmia University, Urmia, Iran
| | - Amir Tukmechi
- Faculty of Veterinary Medicine, Department of Microbiology, Urmia University, Urmia, Iran
| | - Ehsan Rashidian
- Faculty of Veterinary Medicine, Department of Microbiology, Lorestan University, Lorestan, Iran
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Amoroso MG, Langellotti AL, Russo V, Martello A, Monini M, Di Bartolo I, Ianiro G, Di Concilio D, Galiero G, Fusco G. Accumulation and Depuration Kinetics of Rotavirus in Mussels Experimentally Contaminated. FOOD AND ENVIRONMENTAL VIROLOGY 2020; 12:48-57. [PMID: 31691900 DOI: 10.1007/s12560-019-09413-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 10/25/2019] [Indexed: 05/18/2023]
Abstract
Bivalve mollusks as filter-feeders concentrate in their digestive tissue microorganisms likely present in the harvesting water, thus becoming risky food especially if consumed raw or poorly cooked. To eliminate bacteria and viruses eventually accumulated, they must undergo a depuration process which efficacy on viruses is on debate. To better clarify the worth of the depuration process on virus elimination from mussels, in this study we investigated rotavirus kinetics of accumulation and depuration in Mytilus galloprovincialis experimentally contaminated. Depuration process was monitored for 9 days and virus residual presence and infectivity were evaluated by real time quantitative polymerase chain reaction, cell culture and electron microscopy at days 1, 2, 3, 5, 7, 9 of depuration. Variables like presence of ozone and of microalgae feeding were also analyzed as possible depuration enhancers. Results showed a two-phase virus removal kinetic with a high decrease in the first 24 h of depuration and 5 days necessary to completely remove rotavirus.
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Affiliation(s)
- Maria Grazia Amoroso
- Department of Animal Health, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy.
| | - Antonio Luca Langellotti
- Aquaculture Division, CAISIAL Center, University of Naples Federico II, Via Salute, Portici, NA, Italy
| | - Valeria Russo
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via Delpino 2, Naples, Italy
| | - Anna Martello
- Aquaculture Division, CAISIAL Center, University of Naples Federico II, Via Salute, Portici, NA, Italy
| | - Marina Monini
- Istituto Superiore Di Sanità Department of Food Safety, Nutrition and Veterinary Public Health, Viale Regina Elena 299, 00161, Rome, Italy
| | - Ilaria Di Bartolo
- Istituto Superiore Di Sanità Department of Food Safety, Nutrition and Veterinary Public Health, Viale Regina Elena 299, 00161, Rome, Italy
| | - Giovanni Ianiro
- Istituto Superiore Di Sanità Department of Food Safety, Nutrition and Veterinary Public Health, Viale Regina Elena 299, 00161, Rome, Italy
| | - Denise Di Concilio
- Department of Animal Health, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy
| | - Giorgio Galiero
- Department of Animal Health, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy
| | - Giovanna Fusco
- Department of Animal Health, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy.
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Hull N, Miller J, Berry D, Laegreid W, Smith A, Klinghagen C, Schumaker B. Optimization of Brucella abortus Protocols for Downstream Molecular Applications. J Clin Microbiol 2018; 56:e01894-17. [PMID: 29436425 PMCID: PMC5869842 DOI: 10.1128/jcm.01894-17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/02/2018] [Indexed: 01/30/2023] Open
Abstract
We compared the performances of various DNA extraction kits for their ability to recover Brucella abortus strain 19 inoculated into Brucella-free bovine tissues. Tissues were homogenized in a FastPrep bead homogenizer and extracted in triplicate by using one of five kits (Qiagen DNeasy, GE Illustra, Omega Bio-tek E.Z.N.A., Quanta Extracta, and IBI Science DNA Tissue kit). Whole blood was also taken from animals prior to chemical euthanasia, aliquoted, and then fractioned into buffy coat, red blood cells, and plasma. DNA was extracted from whole blood, buffy coat, and plasma by using four kits (Qiagen DNeasy, Omega Bio-tek E.Z.N.A., IBI Science DNA Blood kit, and 5PRIME PerfectPure). Previously reported primers targeting strain 19 were used to amplify extracted DNA and identify the optimal extraction kit. Real-time PCR was performed, and kits were compared for statistical differences by using quantification cycles as an outcome measure. Omega Bio-tek E.Z.N.A. was superior (P < 0.0068) in its lower quantification cycle values across all tissue kits. The IBI Science DNA Blood kit was superior to Qiagen DNeasy, 5PRIME PerfectPure, and Quanta Extracta (P < 0.0001, P = 0.0004, and P = 0.0013, respectively) but was not different from Omega Bio-tek E.Z.N.A. (P = 1.0). In summary, the optimal extraction kit for B. abortus strain 19 for tissues is Omega Bio-tek E.Z.N.A., and that for blood and its fractions is the IBI Science Mini Genomic DNA kit. Eluted DNA was also concentrated by using the Zymo Research DNA Clean & Concentrator-25 kit. Concentrated eluted DNA with the target was superior (P = <0.0001) to unconcentrated eluted DNA.
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Affiliation(s)
- Noah Hull
- Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming, USA
| | - Jonathan Miller
- Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming, USA
| | - David Berry
- Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming, USA
| | - William Laegreid
- Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming, USA
- Wyoming State Veterinary Laboratory, University of Wyoming, Laramie, Wyoming, USA
| | - Ashley Smith
- Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming, USA
| | - Callie Klinghagen
- Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming, USA
| | - Brant Schumaker
- Department of Veterinary Sciences, University of Wyoming, Laramie, Wyoming, USA
- Wyoming State Veterinary Laboratory, University of Wyoming, Laramie, Wyoming, USA
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Shell WS, Sayed ML, Samy AA, Al-Sadek GM, El-Hamid GMMA, Ali AHM. Using real-time polymerase chain reaction as an alternative rapid method for enumeration of colony count in live Brucella vaccines. Vet World 2017; 10:610-615. [PMID: 28717311 PMCID: PMC5499076 DOI: 10.14202/vetworld.2017.610-615] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 04/18/2017] [Indexed: 01/08/2023] Open
Abstract
Aim:: Brucellosis is a major bacterial zoonosis of global importance affecting a range of animal species and man worldwide. It has economic, public health, and bio-risk importance. Control and prevention of animal brucellosis mainly depend on accurate diagnostic tools and implementation of effective and safe animal vaccination program. There are three types of animal Brucella live vaccines - Brucella melitensis Rev-1 vaccine, Brucella abortus S19, and B. abortus RB51. Evaluation of these vaccines depends mainly on enumeration of Brucella viable count. At present, used colony count method is time consuming, costly and requires especial skills. Hence, the aim of this study is to use and standardize real-time polymerase chain reaction (RT-PCR) as an alternative, quantitative, sensitive, and rapid method to detect the colony count of Brucella in live Brucella vaccine. Materials and Methods:: Four batches of different live Brucella vaccines were evaluated using of conventional bacterial count and RT-quantitative PCR (RT-qPCR) using BSCP31 gene specific primers and probe. Standard curve was generated from DNA template extracted from 10-fold serial dilution of living B. abortus RB51 vaccine to evaluate the sensitivity of RT-qPCR. Results:: Results revealed that three batches of living Brucella vaccines were acceptable for Brucella colony count when traditional bacterial enumeration method was used. Results of RT-qPCR were identical to that of conventional bacterial count. Conclusions:: Results concluded that RT-qPCR was relatively sensitive compared to traditional bacterial colony count of these vaccines.
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Affiliation(s)
- Waleed S Shell
- Central Laboratory for Evaluation of Veterinary Biologics, Cairo, Abbasia, Egypt
| | - Mahmoud L Sayed
- Central Laboratory for Evaluation of Veterinary Biologics, Cairo, Abbasia, Egypt
| | - A A Samy
- Department of Microbiology and Immunology, National Research Center, Egypt
| | | | | | - Abdel Hakam M Ali
- Central Laboratory for Evaluation of Veterinary Biologics, Cairo, Abbasia, Egypt
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Fusco G, Di Bartolo I, Cioffi B, Ianiro G, Palermo P, Monini M, Amoroso MG. Prevalence of Foodborne Viruses in Mussels in Southern Italy. FOOD AND ENVIRONMENTAL VIROLOGY 2017; 9:187-194. [PMID: 28054332 DOI: 10.1007/s12560-016-9277-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 12/26/2016] [Indexed: 06/06/2023]
Abstract
In this study, the prevalence of various enteric viruses in Mytilus galloprovincialis (Mediterranean mussel) belonging to class A and class B mollusc-harvesting areas in the Campania region in southern Italy was evaluated. One hundred and eight mussels were analysed using real-time reverse transcription PCR during a 2-year collection period (2014-2015) to detect the following viruses: human norovirus (genogroups I and II), rotavirus, astrovirus, sapovirus, aichivirus, hepatitis A virus and hepatitis E virus. Overall, 50.93% of mussels were contaminated by at least one of the tested viruses. Of these virus-positive mussels, 63.63% were contaminated by two or more viruses. In 2014, only three of the eight investigated viruses were detected: astrovirus, sapovirus and aichivirus, whereas in 2015, seven of the eight viruses were detected (only hepatitis E virus was not identified). Astrovirus was the most frequently detected virus in both sampling periods. In 2014, sapovirus was detected at the same frequency as astrovirus (16.00%), followed by aichivirus (8%). In 2015, astrovirus (32.53%) was most frequently detected, followed by norovirus GII (26.50%), sapovirus (18.07%), hepatitis A virus (16.87%), rotavirus (16.87%), aichivirus (13.25%) and norovirus GI (12.05%).This study describes, for the first time, the presence of aichivirus and sapovirus in mussels in Italy.
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Affiliation(s)
- Giovanna Fusco
- Department of Animal Health, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy.
| | - Ilaria Di Bartolo
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, Vial Regina Elena 299, 00161, Rome, Italy
| | - Barbara Cioffi
- Department of Animal Health, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy
| | - Giovanni Ianiro
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, Vial Regina Elena 299, 00161, Rome, Italy
| | - Pierpaolo Palermo
- Veterinarian Epidemiological Surveillance Center, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy
| | - Marina Monini
- Department of Veterinary Public Health and Food Safety, Istituto Superiore di Sanità, Vial Regina Elena 299, 00161, Rome, Italy
| | - Maria Grazia Amoroso
- Department of Animal Health, Experimental Zooprophylactic Institute of Southern Italy, Via Salute, 2, 80055, Portici, NA, Italy.
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Zhou B, Xiao J, Liu S, Yang J, Wang Y, Nie F, Zhou Q, Li Y, Zhao G. Simultaneous detection of six food-borne pathogens by multiplex PCR with a GeXP analyzer. Food Control 2013. [DOI: 10.1016/j.foodcont.2012.11.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Raman spectroscopy as a potential tool for detection of Brucella spp. in milk. Appl Environ Microbiol 2012; 78:5575-83. [PMID: 22660699 DOI: 10.1128/aem.00637-12] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Detection of Brucella, causing brucellosis, is very challenging, since the applied techniques are mostly time-demanding and not standardized. While the common detection system relies on the cultivation of the bacteria, further classical typing up to the biotype level is mostly based on phenotypic or genotypic characteristics. The results of genotyping do not always fit the existing taxonomy, and misidentifications between genetically closely related genera cannot be avoided. This situation gets even worse, when detection from complex matrices, such as milk, is necessary. For these reasons, the availability of a method that allows early and reliable identification of possible Brucella isolates for both clinical and epidemiological reasons would be extremely useful. We evaluated micro-Raman spectroscopy in combination with chemometric analysis to identify Brucella from agar plates and directly from milk: prior to these studies, the samples were inactivated via formaldehyde treatment to ensure a higher working safety. The single-cell Raman spectra of different Brucella, Escherichia, Ochrobactrum, Pseudomonas, and Yersinia spp. were measured to create two independent databases for detection in media and milk. Identification accuracies of 92% for Brucella from medium and 94% for Brucella from milk were obtained while analyzing the single-cell Raman spectra via support vector machine. Even the identification of the other genera yielded sufficient results, with accuracies of >90%. In summary, micro-Raman spectroscopy is a promising alternative for detecting Brucella. The measurements we performed at the single-cell level thus allow fast identification within a few hours without a demanding process for sample preparation.
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