1
|
Sayed RH, Soliman RT, Elsaady SA. Development of a lateral flow device for rapid simultaneous multiple detections of some common bacterial causes of bovine mastitis. J Adv Vet Anim Res 2023; 10:292-300. [PMID: 37534067 PMCID: PMC10390667 DOI: 10.5455/javar.2023.j681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/29/2023] [Accepted: 04/02/2023] [Indexed: 08/04/2023] Open
Abstract
Objective This work was conducted for the development of a 5-combi lateral flow immunochromatographic kit (LFK) for rapid and simultaneous identification of the common bacterial causes of bovine mastitis. The following pathogens are the identification targets of this kit: Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Streptococcus agalactiae, and Streptococcus pyogenes in milk samples from suspected bovine mastitis cases. The conventional microbiological identification of these agents is not only time-consuming and requires a fully equipped laboratory but also requires experienced personnel. Materials and Methods Rabbit polyclonal antibodies (PAbs) specific to the antigenic components of the selected pathogens were prepared, and the pathogen-specific IgG was separated, purified, and conjugated with nanogold that was laid on the conjugate pad. Guinea pig PAbs specific to the microbial antigens of the selected pathogens were prepared, and their IgG content was separated, purified, and used as a capture antibody in the test (T) line on the nitrocellulose (NC) strips. Goat anti-rabbit IgG antibodies were used to capture the rabbit antibodies in the control (C) line of NC strips. The kit was held in a device comprising five strip-holding channels for the above-mentioned five bacterial species antigens. The developed LFK was evaluated, and its sensitivity and specificity were determined. Results The developed kits were applied for the examination of bovine milk samples from suspected mastitis cases, and the average sensitivity, specificity, and accuracy of 5-combi LFK for the detection of the five selected bacterial species compared to bacteriological examination (gold standard test) were 93.90%, 80.83%, and 90.53%, respectively. The minimal microbial count that gave positive results using the developed LFK was 103 colony forming unit/ml. Treatment of the milk samples with an application buffer and its pre-incubation in trypticase soy broth for 6 h at 37°C before testing significantly increased the sensitivity of the prepared LFK. The developed kit proved simple and convenient, and the results could be obtained in less than 10 min.
Collapse
Affiliation(s)
| | - Rafik Twfik Soliman
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Cairo, Egypt
| | | |
Collapse
|
2
|
McNicholl AG, Garre A, Llorca L, Bujanda L, Molina-Infante J, Barenys M, Perez J, Guerrero-Torres MD, Tamayo E, Montes M, Prados-Manzano R, Sanchez-Garcia A, Ramas M, Valdez Blanco VB, Montoro M, Calvet X, Figuerola A, Lario S, Quilez E, Lanas A, Silva-Pomarino P, Perez-Aisa A, Donday MG, Belloc B, Montserrat-Torres A, Fernandez-Moreno N, Ramírez MJ, Alarcon T, Gisbert JP. Prospective, study comparing the accuracy of two different stool antigen tests (Premier Platinum HpSA and novel ImmunoCard STAT! rapid test) for the diagnosis of Helicobacter pylori infection. GASTROENTEROLOGIA Y HEPATOLOGIA 2019; 43:117-125. [PMID: 31810793 DOI: 10.1016/j.gastrohep.2019.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/16/2019] [Accepted: 09/25/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND At present only monoclonal EIA (enzyme-immunoassay) stool antigen-tests have obtained optimal accuracy in the diagnosis of Helicobacter pylori. Our aim was to evaluate the accuracy of two stool antigen-tests, the validated Premier Platinum HpSA PLUS (EIA test) and the newly available ImmunoCard STAT! HpSA HD (rapid test) for the initial diagnosis and the confirmation of eradication of H. pylori infection. PATIENTS AND METHODS Patients with indication of H. pylori diagnosis, or confirmation after treatment were included. Data were coded to protect personal data and ensure blindness between tests. Accuracy was considered as coincident diagnosis with the gold standard (13C-urea breath test, UBT). The EIA was used as a bench standard. All stool tests were performed in duplicate. RESULTS 264 patients completed the protocol (100 naïve, 164 post-eradication). Average age was 52 years, 61% women, 11% ulcer. Positive diagnoses by UBT were 41% for naïve and 17% for post-eradication. Overall ImmunoCard and EIA accuracies were respectively 91% (95%C.I.=88-94%) and 89% (86-93%), sensitivities 72% (67-78%) and 72% (67-78%), and specificities 98% (96-100%), and 95% (92-97%). Concordance between ImmunoCard and EIA was 95% (93-98%). DISCUSSION Our results indicate that the newly available ImmunoCard rapid stool antigen-test achieves 90% accuracy, with high specificity but suboptimal sensitivity. The ImmunoCard attained equivalent accuracies as the EIA bench standard, with 95% concordance.
Collapse
Affiliation(s)
- Adrian G McNicholl
- Gastroenterology Unit, La Princesa University Hospital, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Ana Garre
- Gastroenterology Unit, La Princesa University Hospital, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Laura Llorca
- Microbiology Service, La Princesa University Hospital and Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | - Luis Bujanda
- Digestive Service, Donostia University Hospital and Instituto Biodonostia, Universidad del País Vasco UPV/EHU and CIBERehd, San Sebastián, Spain
| | | | - Merce Barenys
- Digestive Service, Viladecans Hospital, Barcelona, Spain
| | - Julia Perez
- Gastroenterology Unit, La Princesa University Hospital, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Maria D Guerrero-Torres
- Microbiology Service, La Princesa University Hospital and Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | - Esther Tamayo
- Microbiology Service, Donostia University Hospital and Instituto Biodonostia, Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), San Sebastián, Spain
| | - Milagrosa Montes
- Microbiology Service, Donostia University Hospital and Instituto Biodonostia, Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), San Sebastián, Spain
| | - Raul Prados-Manzano
- Digestive Service, San Pedro de Alcántara Hospital, and CIBERehd, Cáceres, Spain
| | | | - Mercedes Ramas
- Gastroenterology Unit, La Princesa University Hospital, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Veronica B Valdez Blanco
- Microbiology Service, La Princesa University Hospital and Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | | | - Xavier Calvet
- Digestive Service, Hospital Universitari Parc Taulí, and CIBERehd, Sabadell, Spain
| | - Ariadna Figuerola
- Digestive Service, Hospital Universitari Parc Taulí, and CIBERehd, Sabadell, Spain
| | - Sergio Lario
- Digestive Service, Hospital Universitari Parc Taulí, and CIBERehd, Sabadell, Spain
| | - Eia Quilez
- Digestive Service, Hospital Universitari Parc Taulí, and CIBERehd, Sabadell, Spain
| | - Angel Lanas
- Digestive Service, Lozano Blesa Hospital, and CIBERehd, Zaragoza, Spain
| | | | - Angeles Perez-Aisa
- Digestive Service, Agencia Sanitaria Costa del Sol Hospital, Málaga, Spain
| | - Maria G Donday
- Gastroenterology Unit, La Princesa University Hospital, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Blanca Belloc
- Digestive Service, San Jorge Hospital, Huesca, Spain
| | | | | | - María José Ramírez
- Digestive Service, Hospital Universitari Parc Taulí, and CIBERehd, Sabadell, Spain
| | - Teresa Alarcon
- Microbiology Service, La Princesa University Hospital and Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | - Javier P Gisbert
- Gastroenterology Unit, La Princesa University Hospital, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain.
| |
Collapse
|