ArticleVeterinary medicine and science2024
Evaluation of haematological parameters in haemolytic anaemia caused by tick-borne pathogens in grazing cattle.
Article in Veterinary medicine and science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 4 citations in OpenAlex.
- Effects of Tick Infestation on Milk Yield, Blood Biochemistry, Hematology, and the Overall Health of Dairy Cows.Pathogens (Basel, Switzerland) · 2025Article
- The efficacy of toltrazuril for prevention of oriental theileriosis (Theileria orientalis Ikeda genotype) in Friesian calves.Australian veterinary journal · 2025Article
- Evaluation of haematological parameters in haemolytic anaemia caused by tick-borne pathogens in grazing cattle.Veterinary medicine and science · 2024Article
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Authors and funding
9 authors at 3 institutions in 1 country.
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Abstract
backgroundNo tick-borne pathogens (TBPs) causing haemolytic anaemia in cattle have been reported, except Theileria orientalis and complete blood count (CBC) profile is the only haematological parameter to determine the severity of regenerative haemolytic anaemia.
objectivesTo identify the causative agents of TBP-induced haemolytic anaemia and determine haematological parameters that indicate haemolytic anaemia in grazing cattle.
methodsEighty-two Korean indigenous cattle (Hanwoo) were divided into two groups: grazing (n = 67) and indoor (n = 15) groups. CBC and serum biochemistry were performed. PCR was conducted using whole blood-extracted DNA to investigate the prevalence of TBPs.
resultsTBP-induced haemolytic anaemia was observed in the grazing group. In grazing cattle, co-infection (43.3%, 29/67) was most frequently detected, followed by T. orientalis (37.6%, 25/67) and Anaplasma phagocytophilum infections (1.5%, 1/67). In indoor cattle, only co-infection (20%, 3/15) was identified. Grazing cattle exhibited regenerative haemolytic anaemia with marked monocytosis, mild neutropenia, and thrombocytopenia. According to grazing frequency, the 1st-time grazing group had more severe anaemia than the 2nd-time grazing group. Elevations in indirect bilirubin and L-lactate due to haemolytic anaemia were identified, and correlations with the respective markers were determined in co-infected grazing cattle.
conclusionsQuantitative evaluation of haematocrit, mean corpuscular volume, and reticulocytes (markers of regenerative haemolytic anaemia in cattle) was performed for the first time. Our results show that, in addition to T. orientalis, A. phagocytophilum is strongly associated with anaemia. The correlation between haemolytic anaemia severity and haematological parameters (indirect bilirubin, reticulocytes, and L-lactate) was confirmed.
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