Arteriovenous Anastomoses in the Dermal Vasculatureof the Skin of Bos taurus Cattle, and their Relationship with Resistance to the Tick, Boophilus micro plus

Schleger, AV; Lincoln, Doug; Bourne, A. S.

doi:10.1071/bi9810027

Cited by 18 publications

(10 citation statements)

References 12 publications

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“…It also does not account for the possibility that peripheral cells, especially monocytes, might act differently at the tick attachment site in the skin. Tick resistance has been correlated with other factors, such as the intensity of skin reaction in B. taurus and B. indicus cattle (2), the amount of histamine in the skin of B. taurus cattle (32) and innate factors, including grooming (33), concentration of vascular supply (34) and arteriovenous anastomoses in the skin (35). It becomes clear from these studies that resistance to ticks is complex.…”

Section: Discussionmentioning

confidence: 99%

Effect of salivary gland extracts from the tick, Boophilus microplus, on leucocytes from Brahman and Hereford cattle

Turni

Lee

Jackson

2002

Parasite Immunology

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The effect of salivary gland extract (SGE) from Boophilus microplus on peripheral blood lymphocytes, neutrophils and monocytes from Brahman (Bos indicus) and Hereford (Bos taurus) cattle was investigated. SGE (8 micro g) significantly inhibited the proliferation response of lymphocytes to concanavalin A from both Brahman and Hereford cattle by 89% and 41%, respectively. The difference in inhibition between the two breeds was highly significant (P < 0.01), whilst at 1 micro g of SGE, significant inhibition of lymphocytes occurred only in Hereford cattle (34%). Flow cytometric analysis of monocytes and neutrophils showed that SGE (40 micro g) significantly reduced both the proportion of cells actively phagocytosing Escherichia coli labelled with fluorescein isothiocyanate (E. coli-FITC) and the uptake of E. coli-FITC in Brahman cattle. However, in Hereford cattle, a significant depression in uptake was only observed in neutrophils. The proportion of monocytes and neutrophils with oxidative activity was significantly suppressed in the presence of SGE in both breeds of cattle. These results indicate that peripheral blood leucocytes from different breeds of cattle respond differently to SGE.

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Section: Discussionmentioning

confidence: 99%

Effect of salivary gland extracts from the tick, Boophilus microplus, on leucocytes from Brahman and Hereford cattle

Turni

Lee

Jackson

2002

Parasite Immunology

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“…Thus on Belmont , there was a need to select European B. taurus cattle which had anti‐parasitic mechanisms to enable them to survive and maintain fitness. Cattle, as with other herbivores, have evolved various anti‐tick mechanisms: multiple immunological processors, hypersensitivity and exudate and grooming behaviour (Riek 1962; Roberts 1968a; Schleger et al. 1981; Brossard and Wikel 2004).…”

Section: Bos Taurus Breeding Programmes In Unfavourable Environments:mentioning

confidence: 99%

Evolutionary process of Bos taurus cattle in favourable versus unfavourable environments and its implications for genetic selection

O’Neill

Swain

Kadarmideen

2010

Evolutionary Applications

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The evolutionary processes that have enabled Bos taurus cattle to establish around the globe are at the core to the future success of livestock production. Our study focuses on the history of cattle domestication including the last 60 years of B. taurus breeding programmes in both favourable and unfavourable environments and its consequences on evolution and fitness of cattle. We discuss the emergence of ‘production diseases’ in temperate production systems and consider the evolutionary genetics of tropical adaptation in cattle and conclude that the Senepol, N'Dama, Adaptaur and Criollo breeds, among others with similar evolutionary trajectories, would possess genes capable of improving the productivity of cattle in challenging environments. Using our own experimental evidence from northern Australia, we review the evolution of the Adaptaur cattle breed which has become resistant to cattle tick. We emphasize that the knowledge of interactions between genotype, environment and management in the livestock systems will be required to generate genotypes for efficient livestock production that are both economically and environmentally sustainable. Livestock producers in the 21st century will have less reliance on infrastructure and veterinary products to alleviate environmental stress and more on the animal's ability to achieve fitness in a given production environment.

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“…The mechanisms of protection and possible explanations for the differences in resistance to tick infestation between B. indicus and B. taurus include variation in the structure and physiology of the skin, the density of arteriovenous anastomoses at the skin surface, histamine concentrations at the larval attachment site, self‐grooming stimulated by and directed to larval stages and histological features of the tongue . However, the immune response plays an important role in protection .…”

Section: Introductionmentioning

confidence: 99%

Local immune response to larvae of Rhipicephalus microplus in Santa Gertrudis cattle

Constantinoiu

Lew-Tabor

Jackson

et al. 2018

Parasite Immunology

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This study investigated the local immune response at larval attachment sites in Santa Gertrudis cattle with low and high levels of tick resistance. Skin samples with tick larvae attached were collected from Santa Gertrudis cattle at the end of a period of 25 weekly infestations, when the animals manifested highly divergent tick-resistant phenotypes. There was a tendency for more CD3 , CD4 , CD8 , CD25 , γδ T cells and neutrophils to concentrate at larval tick attachment site in susceptible cattle than in resistant cattle but the differences were significant only for γδ T cells and CD4 cells. Most of the cattle developed intra-epidermal vesicles at the larval attachment site but the predominant cell within or around the vesicles was the neutrophil in susceptible animals and eosinophil in the resistant animals. The monoclonal antibodies (mAbs) specific for CD45 and CD45 RO antigens reacted with skin leucocytes from a higher number of susceptible cattle than resistant cattle. Our data suggest that some of the cellular responses mounted at larval attachment site are not involved in tick protection. The mAbs specific for CD45 and CD45 RO directly, or a test for CD45 genotype might be developed as markers of tick susceptibility or resistance.

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Arteriovenous Anastomoses in the Dermal Vasculatureof the Skin of Bos taurus Cattle, and their Relationship with Resistance to the Tick, Boophilus micro plus

Cited by 18 publications

References 12 publications

Effect of salivary gland extracts from the tick, Boophilus microplus, on leucocytes from Brahman and Hereford cattle

Effect of salivary gland extracts from the tick, Boophilus microplus, on leucocytes from Brahman and Hereford cattle

Evolutionary process of Bos taurus cattle in favourable versus unfavourable environments and its implications for genetic selection

Local immune response to larvae of Rhipicephalus microplus in Santa Gertrudis cattle

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