Peer-reviewed veterinary case report
Tick-borne infections found in dogs and ticks in Metro Manila
By Galay, Remil L et al.·Published in Parasites & vectors·2018·Department of Veterinary Paraclinical Sciences·View original on PubMed →
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Original publication title: Molecular detection of tick-borne pathogens in canine population and Rhipicephalus sanguineus (sensu lato) ticks from southern Metro Manila and Laguna, Philippines.
- Species:
- dog
Plain-English summary
A study found that 22.6% of dogs in southern Metro Manila and Laguna, Philippines, tested positive for tick-borne infections, particularly Ehrlichia canis, which is a common cause of illness in dogs. Blood samples from 248 dogs showed that some had multiple infections, indicating that co-infection with different tick-borne pathogens is frequent. Rickettsia, another type of infection, was also detected in a small number of dogs, marking the first evidence of this infection in dogs in the Philippines. This highlights the importance of testing for various tick-borne diseases in dogs, especially in areas where ticks are prevalent.
People also search for: dog tick-borne disease symptoms · Ehrlichia canis treatment for dogs · Rickettsia infection in dogs
Abstract
BACKGROUND: The tropical climate of the Philippines and the high population of dogs, particularly in cities, favors the life-cycle of the brown dog tick, Rhipicephalus sanguineus (sensu lato), a vector of several canine tick-borne pathogens (TBPs) including zoonotic Rickettsia spp. Suspected cases of infections are commonly encountered in veterinary clinics, but the specific TBPs are rarely identified. Furthermore, infection with Rickettsia is not being clinically examined in dogs. In this study, the occurrence of TBPs in blood and ticks collected from household and impounded dogs in highly populated areas of the Philippines, Metro Manila, and the nearby province of Laguna, was examined. RESULTS: A total of 248 blood samples and 157 tick samples were subjected to PCR. First, samples were screened using primers for Anaplasma/Ehrlichia spp. and Babesia/Hepatozoon spp. Those that turned positive were further subjected to species-specific PCR. Rickettsia spp. were also detected through a nested PCR. Of the 248 blood samples, 56 (22.6%) were positive for Anaplasma/Ehrlichia spp., while 19 (7.6%) were positive for Babesia/Hepatozoon spp. Species-specific PCR revealed that 61 (23.4%) had a single TBP, with Ehrlichia canis being detected in 39 (15.7%) dogs, while 14 (5.6%) dogs were positive for different combinations of two to four TBPs. Rickettsia infection was detected in 6 (2.4%) dogs. In tick samples, 8 (3.2%) were positive for Ehrlichia/Anaplasma spp., while only 1 (0.63%) was positive for Babesia/Hepatozoon spp. As in the blood samples, E. canis was the most detected, being found in 5 (2%) samples. No tick samples tested positive for Rickettsia spp. CONCLUSION: Ehrlichia canis is the most common TBP affecting dogs in the Philippines. Co-infection with TBPs is quite common, hence testing for multiple TBPs is necessary. Through nested PCR, Rickettsia infection was detected in dogs, and to the authors' knowledge, this study provides the first molecular evidence of Rickettsia infection in dogs in the Philippines.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/30558678/