Normal haematology of captive saker falcons (Falco cherrug)

Samour, Jaime; D'Aloia, M A.; Howlett, J. C.

doi:10.1007/bf00368103

Cited by 12 publications

(2 citation statements)

References 9 publications

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“…In mammals, parasitaemia leads to an increase of eosinophilic granulocytes ( Behm and Ovington, 2000 ; Dombrowicz and Capron, 2001 ), but this is not generally the case in birds ( Campbell and Ellis, 2007 ; Fudge, 2000 ; Wernery et al, 2004 ). Some previous studies point to higher eosinophil counts during parasite infections ( Clark and Kerry, 1993 ; Samour et al, 1996 ). In the present study, eosinophils were among the blood parameter values potentially discriminating infected and non-infected birds based on the LDA analysis, however, the effect of infection on eosinophil proportion was not significant after FDA correction of P -values.…”

Section: Discussionmentioning

confidence: 86%

The prevalence of Leucocytozoon spp. in nestlings of three wild raptor species including implications on haematological and blood chemistry values

Wiegmann

Springer

Rinaud

et al. 2021

International Journal for Parasitology: Parasites and Wildlife

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Leucocytozoonosis is a vector-borne infection of birds, caused by members of the haemosporidian genus Leucocytozoon . The clinical presentation may range from asymptomatic to severe disease. Consequences of Leucocytozoon infection on blood profiles remain to be described, especially for different host species in the wild. In the current study, the prevalence of Leucocytozoon infection was determined in wild nestlings of three European raptor species, the common buzzard ( Buteo buteo , n = 464), red kite ( Milvus milvus , n = 46) and northern goshawk ( Accipiter gentilis , n = 18). Among 528 nestlings, 51.9% (n = 274) were infected with Leucocytozoon spp., whereby the highest prevalence was found in common buzzards (54.9%), followed by red kites (32.6%) and northern goshawks (22.2%). For a subset of 87 individuals (50 common buzzards, 29 red kites, 8 northern goshawks), a detailed analysis of differential leukocyte counts and several blood chemistry parameters in response to infection was conducted: AP (alkaline phosphatase), AST (aspartate aminotransferase), GLDH (glutamate dehydrogenase), LDH (lactate dehydrogenase), GGT (gamma glutamyl transferase), CK (creatine kinase), BuChE (butyrylcholinesterase), BA (bile acids), ALB (albumin) and TP (total protein). Even though in the physiological range, infected nestlings displayed significantly increased levels of heterophils, aspartate aminotransferase, lactate dehydrogenase, bile acids and butyrylcholinesterase, but decreased lymphocyte and monocyte values compared to uninfected ones. Furthermore, significant species differences with regard to blood parameters, but no sex differences were found. Overall, obtained results show a high prevalence, but a low pathogenicity of Leucocytozoon spp. in wild raptor chicks, presumably resulting from coevolutionary adaptation, but show signatures of infection in the haematological and blood chemistry profiles.

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Section: Discussionmentioning

confidence: 86%

The prevalence of Leucocytozoon spp. in nestlings of three wild raptor species including implications on haematological and blood chemistry values

Wiegmann

Springer

Rinaud

et al. 2021

International Journal for Parasitology: Parasites and Wildlife

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“…However, the function of eosinophiles in birds is still little known. Some previous studies had linked Leucocytozoon infections to higher eosinophil counts in raptors [ 55 , 56 ]. Our data did not reveal significant differences on the leukocyte formula between parasitized and non-parasitized birds.…”

Section: Discussionmentioning

confidence: 99%

A Four-Year Survey of Hemoparasites from Nocturnal Raptors (Strigiformes) Confirms a Relation between Leucocytozoon and Low Hematocrit and Body Condition Scores of Parasitized Birds

Martín-Maldonado

Mencía-Gutiérrez

Andreu‐Vázquez

et al. 2023

Veterinary Sciences

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Most hemoparasites hosted by wild birds appear to be harmless, but most of the blood parasite studies in avian wildlife are mainly focused on passerines or migratory species. This study aimed to assess the occurrence of blood parasites in nocturnal raptors (Strigiformes order) and their effect on hematological parameters. A total of 134 blood samples were collected during a four-year period for hematological analysis and hemoparasite detection and quantification by microscopical examination of the samples. Overall, the occurrence of hemoparasites was 35.1%, with Leucocytozoon being the most frequently detected (32.1%), followed by Haemoproteus (11.2%), Trypanosoma and Plasmodium (2.2% each). Among the different bird species, the Eurasian eagle-owl (Bubo bubo) showed the highest blood parasite positivity (94.7%). In barn owls, the positive birds displayed a lower hematocrit measurement and body condition score than the non-parasitized ones (p = 0.007 and p = 0.005, respectively), especially those parasitized by Leucocytozoon. Moreover, the analysis of the magnitude of this association revealed that the presence of hemoparasites is five times more frequent in barn owls with a 2/5 body condition score. Despite the host–parasite coevolution in Strigiformes, our results show a correlation between the presence of hemoparasites and some health parameters, including blood parameters.

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Haematological indicators of inflammation exhibited by Australian Falconiformes

Clark¹,

Raidal

2008

Comp Clin Pathol

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Normal haematology of captive saker falcons (Falco cherrug)

Cited by 12 publications

References 9 publications

The prevalence of Leucocytozoon spp. in nestlings of three wild raptor species including implications on haematological and blood chemistry values

The prevalence of Leucocytozoon spp. in nestlings of three wild raptor species including implications on haematological and blood chemistry values

A Four-Year Survey of Hemoparasites from Nocturnal Raptors (Strigiformes) Confirms a Relation between Leucocytozoon and Low Hematocrit and Body Condition Scores of Parasitized Birds

Haematological indicators of inflammation exhibited by Australian Falconiformes

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