Per citar aquest document: http://ddd.uab.cat/record/112537
Molecular detection of Rickettsia typhi in cats and fleas.
Nogueras, Maria Mercedes (Corporació Parc Taulí)
Pons, Immaculada (Corporació Parc Taulí)
Ortuño Romero, Anna M. (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)
Miret, Jaime
Pla, Júlia (Clínica Veterinària (Sabadell, Catalunya))
Castellà Espuny, Joaquim (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)
Segura, Ferran (Corporació Parc Taulí)

Data: 2013
Resum: Background: Rickettsia typhi is the etiological agent of murine typhus (MT), a disease transmitted by two cycles: rat-flea-rat, and peridomestic cycle. Murine typhus is often misdiagnosed and underreported. A correct diagnosis is important because MT can cause severe illness and death. Our previous seroprevalence results pointed to presence of human R. typhi infection in our region; however, no clinical case has been reported. Although cats have been related to MT, no naturally infected cat has been described. The aim of the study is to confirm the existence of R. typhi in our location analyzing its presence in cats and fleas. Methodology/Principal Findings: 221 cats and 80 fleas were collected from Veterinary clinics, shelters, and the street (2001-2009). Variables surveyed were: date of collection, age, sex, municipality, living place, outdoor activities, demographic area, healthy status, contact with animals, and ectoparasite infestation. IgG against R. typhi were evaluated by indirect immunofluorescence assay. Molecular detection in cats and fleas was performed by real-time PCR. Cultures were performed in those cats with positive molecular detection. Statistical analysis was carried out using SPSS. A p < 0. 05 was considered significant. Thirty-five (15. 8%) cats were seropositive. There were no significant associations among seropositivity and any variables. R. typhi was detected in 5 blood and 2 cultures. High titres and molecular detection were observed in stray cats and pets, as well as in spring and winter. All fleas were Ctenocephalides felis. R. typhi was detected in 44 fleas (55%), from shelters and pets. Co-infection with R. felis was observed. Conclusion: Although no clinical case has been described in this area, the presence of R. typhi in cats and fleas is demonstrated. Moreover, a considerable percentage of those animals lived in households. To our knowledge, this is the first time R. typhi is detected in naturally infected cats.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès.
Document: article ; publishedVersion
Matèria: Immunofluorescence ; DNA sequences ; Cats fleas ; Rickettsia ; Ectoparasitic infections ; Murine typhus
Publicat a: PLoS one, Vol. 8, Issue 8 (August 2013) , p.e71386, ISSN 1932-6203

DOI: 10.1371/journal.pone.0071386


8 p, 869.4 KB

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