Tag Archives: dengue fever

Australia to Use Wolbachia Bacteria to Stop the Spread of Buffalo Fly | Instant News


Australian cattle breeders, especially those from the northern part of the continent, have to face a serious threat, namely the buffalo flies. Now that the famous insect is moving south, governments are relying on bacteria to stop this southward expansion.

Led by Dr. Peter James, a senior researcher at the Center for Animal Science and Postgraduate Coordinator with the Queensland Alliance for Agricultural and Food Innovation (QAAFI), a joint effort involving academia, industry and the Queensland government will rely on bacteria Wolbachia to stop the fly breeding cycle.

(Photo: CSIRO via Wikimedia Commons) CSIRO develops buffalo fly traps. The buffalo fly, Haematobia irritant exigua, is a blood-sucking fly that remains on cows during its adult life, with a brief absence by the female to lay eggs in new cow dung. The numbers of buffalo flies exceed 200 per head for most of the summer in northern Australia and cause heavy production losses.

The buffalo fly problem is a costly concern for the health of Australian cattle, and subsequent meat production in the area. Article from QAAFI puts this problem at about $ 100 million per year, going to maintenance and production losses. The use of insecticides also remains a potential contested solution, facing local resistance coupled with the need to protect the “clean green” reputation known as Australian beef.

The researchers also noted that the buffalo fly has continued to move south over the past 100 years, moving through Queensland to northern New South Wales. In addition, the data model suggests that this climate change-driven expansion will reach South Australia and southwestern Western Australia by 2030.

Fighting the Buffalo Fly

The buffalo fly (Haematobia exigua) is an invasive species introduced to Australia’s Northern Territory in the late 1830s, coming from Asia. It uses two separate mouth parts, splits the skin of the mammal and sucks blood, with cows being the most common victims. This causes large and painful wounds, with the affected animal experiencing severe distress, affecting their diet and affecting the growth and health of the affected animal. The only rest Australian mammals get is when winter arrives, weakening the buffalo flies and forcing them to go into local pockets to survive the winter.

RELATED: Explore Hallett Cove in Australia, Thanks to Virtual Reality

Wolbachia, a solution proposed in the study published in Parasites & Vectors, is a type of intracellular bacteria that mainly attacks insects. It has been used successfully in mitigation dengue fever, which is transmitted by mosquitoes. However, it requires an injection of the bacteria into the fly because Wolbachia is not transmitted sideways between flies but from mother to offspring. This was a challenge for the team because, as Dr. James, the buffalo fly eggs are very hard.

“When we started micro-injecting eggs, like mosquitoes do, we blunted the needle and broke the eggs like you wouldn’t believe it. The needles even burst,” explains Dr. James.

Introducing Wolbachia Through Adults and Pupa

“So from there we looked at adult flies or pupae that inject micro, the idea is that bacteria will still spread through insects and enter the female germ tissue,” added Dr. James. The project leader explained that the main thing was to introduce bacteria into the fly population. Researchers are looking for ways to use male flies as an alternative solution, as Wolbachia are microbes transmitted from mothers passing through eggs.

Researchers are now looking at three possible solutions. If infected males mate with healthy females, they may not have offspring. Furthermore, if a healthy male mates with an infected female and produces infected offspring, that will spread the bacteria to a large part of the population. The final option is to breed and release sterile male buffalo flies, using them to influence weakened flocks during winter.

RELATED: Singapore Has Entered The Second Wave Of Coronavirus While Battling Another Worst Virus Outbreak Since 2013

.



image source

42 new DHF cases emerged | Instant News


KARACHI – At least 42 new cases of dengue fever emerged across the city of Karachi in the past 24 hours, the tally of registered cases has reached 378 in the city so far this month. The Department of Vector-borne Diseases of the Sindh Directorate General of Health Services recorded a total of 389 cases of dengue fever from 01 to 15 October 2020 across Sindh, of them 378 reported in Karachi and 11 from other districts. In Karachi, the majority of DHF cases occurred in East, Central, South, Korangi, Malir and West Districts. VBD has recorded 1378 cases of dengue fever across Sindh province to date, of the 1297 cases reported in the Karachi Division alone. Deaths from dengue fever have also been reported in the city of Karachi this year so far.

.



image source

Brazos County confirms case of West Nile, travel-linked dengue fever case | Instant News



BRYAN, Texas – The Brazos County Department of Health confirmed one case of West Nile and one case of travel-related dengue fever on Monday. The county reported its first positive West Nile case to zip code 77803. The dengue fever case was found at zip code 77808 in a person who had traveled to Mexico. Both diseases are transmitted by mosquitoes, and health officials have asked people to follow these tips to reduce their exposure to mosquitoes. DEET All day, every day: Whenever you are outdoors, use insect repellents containing the active ingredient DEET or other repellents registered by the EPA and always follow the instructions on the dress label: Wear long, loose clothing that is light in color on the outside. all standing water in and around your home or workplace where mosquitoes could lay eggs All day: daytime, dusk and dawn – Limit your time outdoors, mosquitoes are active at all times day or night. Symptoms of West Nile include headache, fever, body aches, joint pain, nausea and fatigue. In more severe cases of the disease, stiff neck, disorientation, tremors, convulsions, paralysis and death have been reported. According to the Centers for Disease Control and Prevention, symptoms of dengue fever include nausea, vomiting, rash, body aches, and pain. Most people will recover from the disease in about a week. According to the Texas Department of State Health Services, Texas has reported more than 3,300 cases of West Nile disease in the past 10 years, including 172 deaths. For more information, visit www. Copyright 2020 by KPRC Click2Houston – All rights reserved. .



image source

Brazos County confirms case of West Nile, travel-linked dengue fever case | Instant News



BRYAN, Texas – The Brazos County Department of Health confirmed one case of West Nile and one case of travel-related dengue fever on Monday. The county reported its first positive West Nile case to zip code 77803. The dengue fever case was found at zip code 77808 in a person who had traveled to Mexico. Both diseases are transmitted by mosquitoes, and health officials have asked people to follow these tips to reduce their exposure to mosquitoes. DEET All day, every day: Whenever you are outdoors, use insect repellents containing the active ingredient DEET or other repellents registered by the EPA and always follow the instructions on the dress label: Wear long, loose clothing that is light in color on the outside. all standing water in and around your home or workplace where mosquitoes could lay eggs All day: daytime, dusk and dawn – Limit your time outdoors, mosquitoes are active at all times day or night. Symptoms of West Nile include headache, fever, body aches, joint pain, nausea and fatigue. In more severe cases of the disease, stiff neck, disorientation, tremors, convulsions, paralysis and death have been reported. According to the Centers for Disease Control and Prevention, symptoms of dengue fever include nausea, vomiting, rash, body aches, and pain. Most people will recover from the disease in about a week. According to the Texas Department of State Health Services, Texas has reported more than 3,300 cases of West Nile disease in the past 10 years, including 172 deaths. For more information, visit www. Copyright 2020 by KPRC Click2Houston – All rights reserved. .



image source

Dengue cases on the rise in Karachi: Ministry of Health | Instant News


KARACHI – The Sindh health office has recorded an increase in dengue cases in Karachi, because the port city recorded 480 infections in the past month alone. According to the health department report, the highest number of cases 222 were reported in the East Karachi district, with Gulshan-e-Iqbal and City of Jamshed being the most affected. There were 480 cases this month, the most affected regencies in the East, while the cases reported this year were 1,149 cases. The Central District registered 112 cases, with North Nazimabad and Gulberg reporting the highest number of patients, the report said. South, Korangi, Malir and West Districts reported 66, 36, 25 and 19 cases, respectively, including women, children and the elderly. The number of dengue infections in Karachi has reached 1,149 this year, the health department report added.

.



image source