Investigation of canine visceral leishmaniasis in a non-endemic area in Brazil and the comparison of serological and molecular diagnostic tests
Rev. Soc. Bras. Med. Trop
;
54: e01822021, 2021. tab, graf
Article
in English
| LILACS
| ID: biblio-1340830
ABSTRACT
Abstract INTRODUCTION:
Visceral leishmaniasis (VL) is an important zoonosis in Brazil. Previous identification of parasitized dogs can also help prevent the disease in humans, even in non-endemic areas of the country. The Brazilian Ministry of Health recommends diagnosis in dogs using a DPP® (rapid test) as a screening test and an immunoenzymatic assay (ELISA) as a confirmatory test (DPP®+ELISA), and culling infected dogs as a legal control measure. However, the accuracy of these serological tests has been questioned.METHODS:
VL in dogs was investigated in a non-endemic area of the São Paulo state for three consecutive years, and the performances of different diagnostic tests were compared.RESULTS:
A total of 331 dog samples were collected in 2015, 373 in 2016, and 347 in 2017. The seroprevalence by DPP®+ELISA was 3.3, 3.2, and 0.3%, respectively, and by indirect immunofluorescence assay (IFA), it was 3.0, 5.6, and 5.5%, respectively. ELISA confirmed 18.4% of DPP® positive samples. The concordance between the IFA and DPP® was 83.9%. The concordance between IFA and DPP®+ELISA was 92.9%. A molecular diagnostic test (PCR) was performed in 63.2% of the seropositive samples, all of which were negative.CONCLUSIONS:
In non-endemic areas, diagnostic tests in dogs should be carefully evaluated to avoid false results.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Leishmania infantum
/
Dog Diseases
/
Leishmaniasis, Visceral
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Animals
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Rev. Soc. Bras. Med. Trop
Journal subject:
Tropical Medicine
Year:
2021
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Instituto Adolfo Lutz/BR
/
Instituto Chico Mendez de Conservação da Biodiversidade/BR
/
Universidade Estadual Paulista Júlio de Mesquita Filho/BR
/
Universidade de São Paulo/BR
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