Hematological, morphological and morphometric characteristics of blood cells from rhea, Rhea Americana (Struthioniformes: Rheidae): a standard for Brazilian birds

Abstract

Blood exams are an indispensable tool in bird medicine. This study aimed at describing values and aspects of rheas' hematology, Rhea americana, as well as analyzing the morphology and morphometry of all blood cells. Fifty eight adult rheas of both sexes from two farms, one in Cachoeiro de Itapemirim, Espírito Santo State and the other in São Carlos, São Paulo State, were selected. Blood samples were taken and RBC count, PCV and Hb levels measured and used in hematimetric indexes calculations. The total and differentiated leukocyte counts, as well as the TPP and fibrinogen were determined. Erythrocytes, leukocytes and thrombocytes were identified and characterized morphologically. (27,44±0,80 g/dL); os valores da série branca foram: CTL (12,072±4116/μL), heterófilos (64,10±9,90%), eosinófilos (2,05±2,06%), monócitos (6,40±2,99%), linfócitos (26,93±9,62%), basófilos (0,52±1,27%). Pode-se concluir que, na média, células sanguíneas de emas são maiores que as de outras aves, porém, não é possível diferenciar estas células em esfregaços somente pelo seu tamanho. Além disso, leucócitos de emas possuem diferentes componentes e coloração como acontece em outras espécies de aves, no entanto, não há nenhum componente ou aspectos tintoriais exclusivo para a espécie.Palavras-chave: patologia clínica, hemograma, proteínas, ratitas, Rhea americana.

Hematological and Cytometrical Parameters of Japanese Quails Coturnix Coturnix Japonica, Temminck & Schlegel, 1848 as Per Sex and Different Stages of Growth

“…The CB of basophil of CM is in accordance with size of basophil of quail studied by Shalini et al (2018). Erythrocyte CL and CB of CM and CF respectively are in accordance with adult Rhea reported by Gallo et al (2015) and adult Uttara fowl by Khan et al (2016). Also, the mean diameter of heterophil of Uttara fowl matches with heterophil CL of CM from this study.…”

Evidence of links between haematological condition and foraging behaviour in northern gannets ( Morus bassanus )

“…For the first time, this study provides haematological reference values for breeding gannets and shows a potential link between haematological parameters and foraging behaviour. Gannet leucocytes were visibly smaller than erythrocytes, in contrast to most avian species where heterophils, monocytes and eosinophils are larger than erythrocytes [10,45]. However, it was not possible to determine whether 20 mm royalsocietypublishing.org/journal/rsos R. Soc.…”

“…To facilitate the evaluation of the avian haemogram, packed cell volume (PCV), total erythrocyte count, haemoglobin concentration, total leucocyte and thrombocyte counts, and leucocyte differentials can be used [4], though it must be noted that not all of these can be obtained using only a blood smear. These haematological analyses allow the measurement of quantitative and qualitative changes in the blood cell fractions and their morphology, which can reveal information about the physiological state of the individual ( [9] as read in [10]).…”