Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Counting the cost of worms in cattle

26.05.2004



CSIRO Livestock Industries scientists in Rockhampton have observed larger-than-expected numbers of a parasitic nematode in the gut of insects responsible for transmitting them - buffalo flies.

The ’filarial’ nematode (Stephanofilaria sp)- one of a group of worms transmitted by insects, and which live in the blood and tissues of their animal or human hosts - has been found in around 50 per cent of female buffalo flies in northern Australia.

The discovery could have implications for the control of both the nematode and the buffalo fly, leading to improved livestock welfare and production potential and reduced hide damage caused by fly bites and nematode activity.



"For such a large percentage of insect vectors to be infected is highly unusual," says CSIRO Livestock Industries researcher, Dr Ian Sutherland.

"By comparison, around one per cent of tsetse flies may be infected with the parasite that causes sleeping sickness and which afflicts millions of people in Africa. And very few mosquitoes are found to contain the malaria parasite at any given time. It seems a reasonable assumption then, that there must be a huge number of worms available to the buffalo flies."

According to Dr Sutherland, when infected buffalo flies feed on the blood of cattle, infective larvae are transmitted from the insects’ salivary glands to beneath the animals’ skin. From there they move into lymph nodes and mature to adults. The parasites then produce thousands of ’microfilaria’, which live in the capillary beds of the skin, where they are ingested by other buffalo flies.

Dr Sutherland’s team has observed a significant inflammatory reaction around these microfilaria and is investigating the role of the parasite in instigating this reaction.

"The immune response to infection is a drain on available energy and can divert resources from growth and reproductive success," Dr Sutherland says.

"So it’s important to understand their effect on the animals’ well-being and production efficiency and, if significant, devise suitable control methods."

Such controls would also benefit Australia’s valuable hide export industry. Early research suggests that control measures could be targeted at the buffalo fly. ’The nematodes don’t develop fully in male flies, so only female flies transmit the parasite,’ Dr Sutherland says. ’If we can understand the mechanism behind this, we may be able to develop a control method that takes advantage of this quirk of biology.’

More information:

Dr Ian Sutherland, CSIRO Livestock Industries, 07 4923 8187

Bill Stephens | CSIRO
Further information:
http://www.csiro.au/index.asp?type=mediaRelease&id=PrWorms

More articles from Agricultural and Forestry Science:

nachricht New insight into why Pierce's disease is so deadly to grapevines
11.06.2018 | University of California - Davis

nachricht Where are Europe’s last primary forests?
29.05.2018 | Humboldt-Universität zu Berlin

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>