Relationship of Hemoglobin Concentration to Packed Cell Volume in Avian Blood Samples

Velguth, Karen E.; Payton, Mark E.; Hoover, John P.

doi:10.1647/2008-042.1

Cited by 53 publications

(45 citation statements)

References 41 publications

(37 reference statements)

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“…The erythrocyte response in the chickens and ducks had varying patterns in this study, even though there was significant depression of TEC, PCV and HbC in both infected chickens and duck when compared with the controls indicating anemia [18]. Blood samples were not collected from moribund birds to forestall polycythemia attributable to hemo-concentration occasioned by reduced water intake and the associated dehydration [19].…”

Section: Discussionmentioning

confidence: 99%

Comparative Evaluation of the Effects of Velogenic Newcastle Disease Virus Infection on the Hematology of Ducks and Chickens

Eze¹,

Okoye²,

Ogbonna³

et al. 2014

OJVM

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The hematological lesions consequent upon velogenic Newcastle disease virus (NDV) infection were investigated in 6-week-old ducks and chickens. Following intramuscular inoculation, the results indicated significantly lower (p < 0.05) packed cell volume (PCV) in infected chickens (IC) on days 3 -9 post inoculation (PI) and in infected ducks (ID) on days 3 -15 PI. The hemoglobin concentrations were significantly lower (p < 0.05) in IC on days 3, 6 and 15 PI while in the ID, they were significantly lower (p < 0.05) on days 3, 9 and 15 PI. The total erythrocyte counts were significantly lower (p < 0.05) in IC on days 3, 9 and 15 PI and in ID, they were significantly lower (p < 0.05) on days 3 and 9 PI. The mean corpuscular values indicated macrocytic hypochromic anemia in IC and macrocytic normochromic anemia in ID. The leucogram showed leucopenia in IC and initial leucopenia followed by leucocytosis in ID. The hematological pictures of the velogenic NDV in this experiment indicate less susceptibility of ducks when compared with the chickens. The severity of this virus infection in chickens and the mild clinical signs and lesions presented by ducks showed that ducks are far less susceptible than chickens.

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Section: Discussionmentioning

confidence: 99%

Comparative Evaluation of the Effects of Velogenic Newcastle Disease Virus Infection on the Hematology of Ducks and Chickens

Eze¹,

Okoye²,

Ogbonna³

et al. 2014

OJVM

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“…). Haematocrit (the ratio of packed red blood cell volume to total blood volume) is strongly correlated with haemoglobin content (Velguth, Payton & Hoover ; Elliott et al . ) and is therefore a good indicator of oxygen stores available to small divers.…”

Section: Introductionmentioning

confidence: 99%

Ageing gracefully: physiology but not behaviour declines with age in a diving seabird

et al. 2014

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Summary 1.A higher proportion of long-lived animals die from senescence than short-lived animals, yet many long-lived homeotherms show few signs of physiological ageing in the wild. This may, however, differ in long-lived diving homeotherms that frequently encounter hypoxic conditions and have very high metabolic rates. 2. To examine ageing within a long-lived diving homeotherm, we studied resting metabolism and thyroid hormones (N = 43), blood oxygen stores (N = 93) and foraging behaviour (N = 230) of thick-billed murres (Uria lomvia). Because murres dive exceptionally deep for their size and have a very high metabolism, we expected that ageing murres would show signs of physiological senescence. We paid particular attention to resting metabolism as we argue that these maintenance costs reflect those experienced during deep dives. 3. Blood oxygen stores (haematocrit), resting metabolic rate and thyroid hormone levels all declined significantly with age in incubating murres 3-30 years of age. In birds measured longitudinally 3 years apart, thyroid hormone levels and haematocrit were both significantly lower, suggesting progressive changes within individuals rather than selective disappearance of individuals with high metabolic rates. Within our longitudinal data set, we found no effect of age on dive depth, dive shape or behavioural aerobic dive limit. 4. A meta-analysis of changes in resting metabolism with age across 15 animal species demonstrated that such declines are pervasive across most of the kingdom. The rate of decline was highest in species with high energy expenditure supporting a linkage between metabolism and senescence. 5. Physiological changes occurred in tandem with advancing age in murres, but offset each other such that there was no detectable decline in behavioural performance.Key-words: basal metabolic rate, behavioural senescence, cost of hypoxia, diving, physiological senescence, rate of living theory, resting metabolic rate, thick-billed murre

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“…Small and portable haemoglobinometers that use a spectrophotometric double-wavelength azide-methaemoglobin method to correct for sample turbidity resulting from lipid particles, cell stromata, and large proteins that tend to interfere with the cyanomethemoglobin method are commercially available and provide reliable results in avian species. A proportional relationship between Hgb concentration and the PCV has been demonstrated and could be estimated by using the formula Hgb (g/dl)=0.30 x PCV in members of the orders Anseriformes, Columbiformes, Falconiformes, Galliformes, Passeriformes, Psittaci-formes, Sphenisciformes, and Strigiformes, and the formula Hgb=0.217 x PCV+6.69 in members of the order Phoenicopteriformes (Velguth and others 2010). …”

Section: Assessment Of Erythrocytesmentioning

confidence: 99%

Avian haematology and biochemistry 1. Haematology

Sabater¹,

Forbes²

2014

In Practice

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The class Aves contains more than 9000 species of birds classified in 199 families. While few species-specific haematological characteristics have been described, there are clear intra-class variations and differences from vertebrates. This article, the first of a two-part series on avian haematology and biochemistry, concentrates on haematology. It includes guidance on how to collect blood samples, how to assess the sample and information on the haematological disorders most commonly found in birds.

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Relationship of Hemoglobin Concentration to Packed Cell Volume in Avian Blood Samples

Cited by 53 publications

References 41 publications

Comparative Evaluation of the Effects of Velogenic Newcastle Disease Virus Infection on the Hematology of Ducks and Chickens

Comparative Evaluation of the Effects of Velogenic Newcastle Disease Virus Infection on the Hematology of Ducks and Chickens

Ageing gracefully: physiology but not behaviour declines with age in a diving seabird

Avian haematology and biochemistry 1. Haematology

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