Alterations in Host Metabolism by the Specific and Anorectic Effects of the Cattle Tick (Boophilus Microplus) II. Changes in Blood Composition

O'Kelly, JC; Seebeck, RM; Springell, PH

doi:10.1071/bi9710381

Cited by 28 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When the tick alone was present, iron parameters were lower than in unparasitised possums (Table 6b); this was presumably due to the blood loss caused by the tick's bloodmeals. A reduced blood iron concentration has previously been reported for tick‐infested cattle (O'Kelly et al 1971, O'Kelly and Kennedy 1981). The presence of E. myrmecobii was associated in a smaller decline in iron concentration and iron saturation than the presence of I. trichosuri (compared to possums that did not host either ectoparasite; Table 6b); this may have been due to increased blood production to replace blood lost from the potentially more frequent flea bloodmeals.…”

Section: Discussionmentioning

confidence: 61%

“…However, the exact eff ect of specifi c ectoparasites is diffi cult to determine, since possums hosting E. myrmecobii exhibited higher ALT levels than possums without this ectoparasite (Table 6d), but possums infested with A. papilio , I. tasmani or I. trichosuri had lower ALT levels than possums without these species (Table 6d). Th ere was no evidence of elevated liver function parameters in association with any of the ixodid tick species, despite tick infestation being known to disrupt host liver metabolism of the host (Kaufman 1989), most likely as a direct eff ect of a toxin secreted by the parasite (O ' Kelly et al 1971). In humans, liver function may also be impacted by the pathogens spread by ectoparasites, such as the tickborne bacteria Babesia spp.…”

Section: Abiotic Characteristics Of Each Habitatmentioning

confidence: 99%

See 1 more Smart Citation

Ectoparasite infestation patterns, haematology and serum biochemistry of urban‐dwelling common brushtail possums

Webster¹,

Hill²,

Burnett

et al. 2014

Wildlife Biology

View full text Add to dashboard Cite

Urban environments support high concentrations of humans, domestic pets and introduced animals, creating conditions conducive to the transmission of parasites. This study compared patterns of ectoparasite infestation of the common brushtail possum Trichosurus vulpecula in urbanised Sydney (n = 161) to those from a remote woodland site (n = 18) from February 2005 – November 2006. We found diff erences in ectoparasite species prevalence between the two groups: the flea Echidnophaga myrmecobii was only found on urban possums and the tick Ixodes trichosuri was much more prevalent in the urban habitat, while the mite Atellana papilio was more prevalent on woodland possums. E. myrmecobii and I. trichosuri diff ered from other ectoparasites by showing an association with host sex and host age. Potential physiological costs of ectoparasitism to urban‐dwelling possums were determined using multivariate analysis of haematology, serum biochemistry and body condition. Changes in serum iron levels were seen in the presence of both the tick Ixodes trichosuri and the flea E. myrmecobii, and E. myrmecobii was associated with elevated serum levels of the liver enzyme ALT. However, ectoparasite‐related changes in haematology and serum biochemistry were not indicative of long‐term pathology. In this urban possum population, the costs of ectoparasitism appear to be limited and unlikely to pose a major threat to the health of the population.

show abstract

Section: Discussionmentioning

confidence: 61%

Section: Abiotic Characteristics Of Each Habitatmentioning

confidence: 99%

Ectoparasite infestation patterns, haematology and serum biochemistry of urban‐dwelling common brushtail possums

Webster¹,

Hill²,

Burnett

et al. 2014

Wildlife Biology

View full text Add to dashboard Cite

show abstract

“…Tick-susceptible animals have decreased protein and dry-matter digestibility and increased nitrogen loss in urine. Infestation also depresses blood concentrations of albumin, haemoglobin, cholesterol and the enzymes alkaline phosphatase, lactate dehydrogenase and amylase (O'Kelly and Seifert 1969Seifert , 1970O'Kelly et al 1971). Other changes suggesting the immune system is implicated include increases in serum globulin, lymphocytes and eosinophils and a decrease in neutrophils (O'Kelly et al 1971).…”

Section: Immunological Mechanismsmentioning

confidence: 99%

“…Infestation also depresses blood concentrations of albumin, haemoglobin, cholesterol and the enzymes alkaline phosphatase, lactate dehydrogenase and amylase (O'Kelly and Seifert 1969Seifert , 1970O'Kelly et al 1971). Other changes suggesting the immune system is implicated include increases in serum globulin, lymphocytes and eosinophils and a decrease in neutrophils (O'Kelly et al 1971). Tick infestation also causes loss of proteins, which is not entirely explained by blood loss (Springell et al 1971).…”

Section: Immunological Mechanismsmentioning

confidence: 99%

Towards a new phenotype for tick resistance in beef and dairy cattle: a review

et al. 2019

View full text Add to dashboard Cite

About 80% of the world’s cattle are affected by ticks and tick-borne diseases, both of which cause significant production losses. Cattle host resistance to ticks is the most important factor affecting the economics of tick control, but it is largely neglected in tick-control programs due to technical difficulties and costs associated with identifying individual-animal variation in resistance. The present paper reviews the scientific literature to identify factors affecting resistance of cattle to ticks and the biological mechanisms of host tick resistance, to develop alternative phenotype(s) for tick resistance. If new cost-effective phenotype(s) can be developed and validated, then tick resistance of cattle could be genetically improved using genomic selection, and incorporated into breeding objectives to simultaneously improve cattle productive attributes and tick resistance. The phenotype(s) could also be used to improve tick control by using cattle management. On the basis of the present review, it is recommended that three possible phenotypes (haemolytic analysis; measures of skin hypersensitivity reactions; simplified artificial tick infestations) be further developed to determine their practical feasibility for consistently, cost-effectively and reliably measuring cattle tick resistance in thousands of individual animals in commercial and smallholder farmer herds in tropical and subtropical areas globally. During evaluation of these potential new phenotypes, additional measurements should be included to determine the possibility of developing a volatile-based resistance phenotype, to simultaneously improve cattle resistance to both ticks and biting flies. Because the current measurements of volatile chemistry do not satisfy the requirements of a simple, cost-effective phenotype for use in commercial cattle herds, consideration should also be given to inclusion of potentially simpler measures to enable indirect genetic selection for volatile-based resistance to ticks.

show abstract

“…Destacam-se também outras doenças que são de grande relevância no contexto de saúde pública, como a brucelose, tuberculose e a mastite, sendo enfermidades que além de trazer problemas sanitários, causam grandes prejuízos econômicos e também de comercialização de produtos. O carrapato dos bovinos, espécie Rhipicephalus (Boophilus) microplus causa inúmeros prejuízos a bovinos susceptíveis (O'Kelly et al 1971, O'Kelly & Kennedy 1981. Grisi et al (2014) atualizaram os prováveis prejuízos econômicos causados por este parasita no país (perda na produção de leite, carne, mortalidade, etc), chegando a soma a mais de três bilhões de dólares anuais.…”

Section: Tópico De Interesse Geralunclassified

Perfil do produtor de leite da região de Joanópolis/SP: como ele lida com o controle do carrapato Rhipicephalus microplus e de outras doenças de importância veterinária

et al. 2018

View full text Add to dashboard Cite

RESUMO: Este estudo verificou o perfil do produtor de leite do município de Joanópolis, SP, situado a 115 km de São Paulo, e como esse produtor lida com o controle do carrapato e outras doenças importantes na pecuária leiteira. Quarenta produtores de leite foram entrevistados. Verificou-se que grande parte deles se enquadra em agricultura familiar: pequenas propriedades com mão-de-obra familiar. Verificou-se que 72,5% possuem outra fonte de renda além do leite; 75% produzem menos que 100 litros de leite por dia, e a maioria não é tecnificada (ordenha manual: 72,5 %; não faz escrituração zootécnica: 55%; não aduba pastos: 80%; não utiliza inseminação artificial: 87,5%). O controle do carrapato é feito sem critérios técnicos; a aplicação do carrapaticida é feita no mesmo local da ordenha; 90% não usam equipamentos de proteção individual para aplicar o carrapaticida. O gado prevalente é o mestiço Girolando (87,5%), que, por ser mais resistente ao carrapato, deve contribuir para que 57,5% dos entrevistados estejam satisfeitos com o controle do carrapato. Verificou-se que poucos produtores (apenas 12,5%) possuem assistência técnica constante. Isso pode ser a explicação para o baixo uso de tecnologias e nas falhas observadas no diagnóstico das doenças e no controle do carrapato.

show abstract

Alterations in Host Metabolism by the Specific and Anorectic Effects of the Cattle Tick (Boophilus Microplus) II. Changes in Blood Composition

Cited by 28 publications

References 10 publications

Ectoparasite infestation patterns, haematology and serum biochemistry of urban‐dwelling common brushtail possums

Ectoparasite infestation patterns, haematology and serum biochemistry of urban‐dwelling common brushtail possums

Towards a new phenotype for tick resistance in beef and dairy cattle: a review

Perfil do produtor de leite da região de Joanópolis/SP: como ele lida com o controle do carrapato Rhipicephalus microplus e de outras doenças de importância veterinária

Contact Info

Product

Resources

About