Abstract
This study aimed to fill a crucial gap in our understanding of Babesia infection in dogs in Mashhad, northeast Iran. We not only investigated the prevalence of Babesia species among dogs but also undertook a comprehensive comparison of clinical, hematological, and clinicopathological findings between infected and non-infected cases, a unique aspect of our research. Materials and methodsOur research was conducted with meticulous attention to detail. We randomly collected blood specimens from a diverse population of 150 dogs, including owned pets (n = 47), stray dogs (n = 66), and shelter dogs (n = 37), to ensure the reliability and representativeness of our findings. We then used microscopy and PCR to investigate Babesia spp. infection and analyzed various biochemical and hematological variables. ResultsThe overall prevalence of babesiosis was 15.3 % (23/150) by PCR and 2 % (3/150) by microscopy. Upon microscopic examination, two cases of large Babesia and one case of small-sized Babesia were identified. The sequencing results confirmed that the two dogs testing positive for large-sized Babesia species in this study were both infected with B. vogeli, exhibiting 100 % sequence identity.There was no association between infection and gender, while housing status (k = 37.294, p = 0.000) and age (k = 6.897, p = 0.021) significantly related to infection rate. Among laboratory variables, infection with Babesia spp. showed a remarkable association with Hct (k = 4.749, p = 0.025) and RBC count (k = 14.669, p = 0.000), which were significantly lower in infected dogs compared to non-infected dogs (p < 0.05). Aside from severe non-regenerative anemia observed in all three clinically infected cases, the most clinicopathological changes were observed in one B. vogeli-infected dog, including pancytopenia, azotemia, hyperphosphatemia, hyperkalemia, hypoglycemia, hypocholesterolemia, hyponatremia. ConclusionThis study reveals a higher-than-expected prevalence of canine babesiosis in Northeastern Iran, necessitating further investigation of tick vectors and Babesia spp. distribution. Notably, many infected dogs were asymptomatic, raising concerns about silent spread via carriers. Moreover, the high prevalence of infection in shelters highlights the need for more effective control strategies in these centers.
Published Version
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