Factors Contributing to Differential Risk Between Heifers in Contracting Summer Mastitis

Thomas, Guy; Prijs, H.J.; Trapman, J. J.

doi:10.1007/978-94-009-3373-6_6

Cited by 8 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the breed, is also known to influence host susceptibility. This has been illustrated by the strong correlation in fly load between mothers and daughters (Thomas et al ., 1987). Clearly, the identification of naturally occurring semiochemicals opens up the way for the development of new approaches to the monitoring and control of nuisance and disease‐vectoring cattle flies, where attractants and repellents are utilized concurrently as part of a ‘push–pull’ strategy (Miller & Cowles, 1990).…”

Section: Discussionmentioning

confidence: 99%

“…An alternative approach is to exploit the natural differentiation between members within the host species. It has been demonstrated for several fly species that individual animals within herds vary in their attractiveness (Thomas et al, 1987;Brown et al, 1992;Jensen et al, 2004). An hypothesis developed to explain this differentiation, which applies to warm-blooded vertebrate hosts and their associated insect pests, is that all members of the host species naturally release volatile attractants, but those which are less attractive release additional compounds that interfere with the activity of the attractants.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The role of volatile semiochemicals in mediating host location and selection by nuisance and disease‐transmitting cattle flies

Birkett

Agelopoulos

Jensen

et al. 2004

Medical Vet Entomology

Self Cite

131

119

View full text Add to dashboard Cite

The role of volatile semiochemicals in mediating the location and selection within herds of Holstein-Friesian heifers by nuisance and disease-transmitting cattle flies was investigated using coupled gas chromatography-electrophysiology (GC-EAG), coupled gas chromatography-mass spectrometry (GC-MS), electrophysiology (EAG), laboratory behaviour and field studies. Using volatile extracts collected by air entrainment from heifers in the Netherlands, a number of active peaks were located by coupled GC-EAG for Musca autumnalis (de Geer) (Diptera: Muscidae) and Haematobia irritans (L.) (Diptera: Muscidae). Volatile samples were also collected from two heifers in Denmark shown in previous counting experiments to differ significantly in their fly loads. Coupled GC-EAG using Ha. irritans antennae revealed differences in the EAG response to the samples, with additional EAG activity in the sample collected from the heifer with the lower fly load. To identify more EAG active compounds, volatiles were also collected from 48-h-old urine by air entrainment. In total, 23 compounds were located and identified by coupled GC-EAG and GC-MS. Further electrophysiological testing of these compounds with five fly species [M. autumnalis, Ha. irritans, Hydrotaea irritans (L.) (Diptera: Muscidae), Stomoxys calcitrans (L.) (Diptera: Musicidae) and Wohlfahrtia magnifica (Schiner) (Diptera: Sarcophagidae)] showed that only some of the compounds were physiologically active across the range of flies tested. These included 1-octen-3-ol, 6-methyl-5-hepten-2-one, (Z)-3-hexen-1-ol, naphthalene, and all EAG active compounds identified from urine. Compounds showing significant EAG activity were tested for behavioural activity using a wind-tunnel designed for measuring upwind flight behaviour. At certain concentrations, 1-octen-3-ol, 6-methyl-5-hepten-2-one and 3-octanol increased upwind flight, whereas naphthalene, propyl butanoate and linalool reduced upwind flight. In field studies using small herds of heifers ranked according to their fly load, individual slow-release formulations of 1-octen-3-ol and 6-methyl-5-hepten-2-one, when applied to low and high fly loading heifers, reduced fly loads on these individuals. This study provides evidence for the hypothesis that the natural differential attractiveness within herds of Holstein-Freisian heifers, i.e. a single host species, for cattle flies is partly due to differences in volatile semiochemicals emitted from the host. It is suggested that this phenomenon applies to other vertebrate host species and their associated insect pests.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The role of volatile semiochemicals in mediating host location and selection by nuisance and disease‐transmitting cattle flies

Birkett

Agelopoulos

Jensen

et al. 2004

Medical Vet Entomology

Self Cite

131

119

View full text Add to dashboard Cite

show abstract

“…There is some evidence that the production of repellents in some vertebrates is genetically determined (Thomas et al 1987). If this is true for Culicoides hosts, it could be exploited to develop breeding programmes to select for unattractive individuals.…”

Section: Olfaction In Vector-host Interactionsmentioning

confidence: 99%

Olfaction in vector-host interactions

Takken¹,

Knols²

2010

View full text Add to dashboard Cite

“…There is a consistent agreement between the peak incidence of summer mastitis with the peak abundance of H. irritans, in spite of geographical differences in seasonal distributions of H. irritans (Thomas et al 1987). The bacteria survive from 7-17 days within the guts of the flies.…”

Section: Mastitismentioning

confidence: 75%