{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T16:07:17Z","timestamp":1785773237244,"version":"3.56.0"},"reference-count":64,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T00:00:00Z","timestamp":1729814400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Shanghai Science and Technology Promotion Agriculture Innovation Program","award":["2022-02-08-00-12-F01085"],"award-info":[{"award-number":["2022-02-08-00-12-F01085"]}]},{"name":"Shanghai Science and Technology Promotion Agriculture Innovation Program","award":["22ZR1476000"],"award-info":[{"award-number":["22ZR1476000"]}]},{"name":"Shanghai Science and Technology Promotion Agriculture Innovation Program","award":["21N31900700"],"award-info":[{"award-number":["21N31900700"]}]},{"name":"Natural Science Foundation of Shanghai","award":["2022-02-08-00-12-F01085"],"award-info":[{"award-number":["2022-02-08-00-12-F01085"]}]},{"name":"Natural Science Foundation of Shanghai","award":["22ZR1476000"],"award-info":[{"award-number":["22ZR1476000"]}]},{"name":"Natural Science Foundation of Shanghai","award":["21N31900700"],"award-info":[{"award-number":["21N31900700"]}]},{"name":"Shanghai Science and Technology Commission Project","award":["2022-02-08-00-12-F01085"],"award-info":[{"award-number":["2022-02-08-00-12-F01085"]}]},{"name":"Shanghai Science and Technology Commission Project","award":["22ZR1476000"],"award-info":[{"award-number":["22ZR1476000"]}]},{"name":"Shanghai Science and Technology Commission Project","award":["21N31900700"],"award-info":[{"award-number":["21N31900700"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pathogens"],"abstract":"<jats:p>Toxoplasma gondii (T. gondii) is an important zoonotic pathogen which induces both acute and chronic toxoplasmosis. Timely diagnosis of T. gondii is crucial for effective disease management. Here, we present a pioneering approach using europium (III)-chelated nanoparticles (EuNPs) in a rapid lateral flow immunochromatographic test strip (ICTS) for detecting T. gondii antibodies in serum samples. By conjugating EuNPs with Staphylococcus aureus protein A, we efficiently captured T. gondii-specific antibodies, which bound to T. gondii antigens on the test line (T-line), generating a distinct fluorescent signal. Employing this novel method, we conducted an extensive epidemiological investigation of T. gondii infections among dogs and cats in Shanghai, China. This innovative ICTS allows for rapid results within 25 min, which include a qualitative result through naked-eye observation under an ultraviolet lamp and a quantitative one derived using a strip reader. With a detection limit of 1:6400 for dog positive serum and no cross-reactivity with other canine and feline pathogens, the EuNPs-ICTS demonstrated excellent consistency with standard enzyme-linked immunosorbent assay results for dogs (\u03ba = 0.91) and cats (\u03ba = 0.92). In addition, 20.38% of 996 dog serum samples and 14.18% of 416 cat serum samples revealed T. gondii antibodies, highlighting the efficacy of this approach. Our study presents a rapid, sensitive, specific, and reproducible EuNPs-ICTS, serving as a promising tool for on-the-spot diagnosis of T. gondii infections in dogs and cats.<\/jats:p>","DOI":"10.3390\/pathogens13110931","type":"journal-article","created":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T10:50:08Z","timestamp":1729853408000},"page":"931","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A Novel Immunochromatographic Test Strip Using Lanthanide-Labeled Fluorescent Nanoparticles for the Serological Detection of Toxoplasma gondii in Dogs and Cats"],"prefix":"10.3390","volume":"13","author":[{"given":"Manyu","family":"Zhang","sequence":"first","affiliation":[{"name":"Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qi","family":"Liu","sequence":"additional","affiliation":[{"name":"International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322023, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruifang","family":"Li","sequence":"additional","affiliation":[{"name":"Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Jiang","sequence":"additional","affiliation":[{"name":"Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongjin","family":"Zhao","sequence":"additional","affiliation":[{"name":"Shanghai Animal Disease Prevention and Control Center, Shanghai 200050, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenwei","family":"Sheng","sequence":"additional","affiliation":[{"name":"Shanghai Animal Disease Prevention and Control Center, Shanghai 200050, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luming","family":"Xia","sequence":"additional","affiliation":[{"name":"Shanghai Animal Disease Prevention and Control Center, Shanghai 200050, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zengqiang","family":"Li","sequence":"additional","affiliation":[{"name":"Shanghai Animal Disease Prevention and Control Center, Shanghai 200050, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qing","family":"Sun","sequence":"additional","affiliation":[{"name":"Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingying","family":"Du","sequence":"additional","affiliation":[{"name":"Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Lei","sequence":"additional","affiliation":[{"name":"Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Quan","family":"Wang","sequence":"additional","affiliation":[{"name":"Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,10,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1217","DOI":"10.1016\/S0020-7519(00)00124-7","article-title":"Toxoplasma gondii: From animals to humans","volume":"30","author":"Heckeroth","year":"2000","journal-title":"Int. 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