Cows and pigs are great livestock, but they can also make you really sick

Cows and pigs are great livestock, but they can also make you really sick.Sometimes in this world, it’s the little things that can cause the most problems. Really, really little things. This is especially true for anyone working around or with livestock in Maine, according to Dr. Anne Lichtenwalner, director of the University of Maine Veterinary Diagnostic Laboratory and associate professor of animal and veterinary science. Some farm animals can actually “share” parasites with their human companions. “There are actually just a handful of parasites that I worry about,” Lichtenwalner said. “These are critters that are parasites that can live inside you and tend not to be fatal, but that can cause some ugly surprises.” The two most common zoonotic parasites — those that can transfer from animals to humans — in Maine are Ascaris suum and Cryptosporidium. “You are protected by your innate and acquired immune system,”

How animal parasites find a home in humans.

How animal parasites find a home in humans. There has been a lot of buzz recently about a video shared by Oregon woman Abby Beckley, who describes removing worms from her eye. Researchers at the Centers for Disease Control and Prevention released a case report documenting Beckley’s infection as the first human case of the cattle eyeworm Thelazia gulosa. We certainly feel for Beckley having to go through this ordeal, and without a doubt, felt our skin crawl just thinking about it. But aside from the “creep” factor of this case, it does makes us wonder how a cow parasite ever ended up in a human eye. And it begs the more fundamental question: How are animal parasites able to infect humans? To answer this question, we need to understand more about parasites and their ecology. As a veterinarian and disease ecologist, my research examines what ecological factors influence the emergence of zoonoses — diseases that spread from animals to humans. The case of the cattle eyeworms is certainly intriguing. Transmission of parasites from one host to another can occur through several routes, depending on where the parasite resides in the host and how it is shed, for example through feces, blood or other bodily secretions. Direct contact, consumption of contaminated water or food (Cryptosporidium, Giardia), or via a vector like a tick or mosquito are all possible. Parasitic infections transmitted from animals to humans have occurred naturally throughout history.

Bacteria carried by unneutered dogs could put pregnant women at risk.

Bacteria carried by unneutered dogs could put pregnant women at risk. Intact dogs can carry Brucella canis bacteria, which can cause flu-like symptoms in people and pose risk to a pregnancy, according to a study in Emerging Infectious Diseases. Brucellosis infections can cause miscarriages in animals and are associated with fetal problems in pregnant women, and the CDC says pregnant women who may have been exposed to the bacteria should consult their health care provider. A bacteria carried by dogs that haven't been neutered can produce flu symptoms in humans and potentially jeopardize a pregnancy, a new study suggests. Brucellosis infection is most commonly spread by livestock like sheep, cattle, goats and pigs. But a strain of the bacterium carried by dogs -- Brucella canis -- could be widespread in humans, warned lead researcher Martha Hensel, a veterinarian with Texas A&M University. B. canis is carried by dogs that can still reproduce, Hensel noted. It's not clear exactly how the bacteria might spread to humans, but it's most likely passed through contact with reproductive organs or urine. People who regularly handle such dogs -- vets, dog shelter employees, dog breeders -- are most at risk for contracting brucellosis, Hensel said. However, pet ownership is a likely risk factor for infection, particularly for young children and people with compromised immune systems, Hensel and her colleagues explained. The researchers highlighted some case studies: 1) A 3-year-old New York City girl came down with brucellosis in 2012 after exposure to an infected puppy recently purchased from a pet store. 2)Several people with HIV have developed brucellosis in recent years, all linked to intact dogs they owned that were later diagnosed with B. canis infection. more

'Green'-feed: Industrial microbes could feed cattle, pigs, chicken.

'Green'-feed: Industrial microbes could feed cattle, pigs, chicken. Deforestation, greenhouse gas emissions, biodiversity loss and nitrogen pollution . Today's agricultural feed cultivation for cattle, pigs and chicken comes with tremendous impacts for the environment and climate. Cultivating feed in industrial facilities instead of on croplands might help to alleviate the critical implications in the agricultural food supply chain. Protein-rich microbes, produced in large-scale industrial facilities, are likely to increasingly replace traditional crop-based feed. A new study now published in the journal Environmental Science & Technology for the first time estimates the economic and environmental potential of feeding microbial protein to pigs, cattle and chicken on a global scale. The researchers find that by replacing only 2 percent of livestock feed by protein-rich microbes, more than 5 percent of agricultural greenhouse gas emissions, global cropland area and global nitrogen losses could each be decreased.

How to detect foot and mouth disease with simple environmental sampling.

How to detect foot and mouth disease with simple environmental sampling. Simple sampling method eases identification of foot and mouth disease outbreaks.

Sampling the environment is an effective way to detect foot and mouth disease, according to a paper published in Applied and Environmental Microbiology, a journal of the American Society for Microbiology. 

 The sampling method, swabbing environmental surfaces where livestock are kept, can be easily performed and can detect viral genetic material that can persist in the environment well beyond the time when livestock cease manifesting clinical signs of disease.

 Unlike taking clinical samples, those taking samples need not be able to recognize clinical signs of foot and mouth disease. Thus, smallholder farmers in developing countries could take the samples in lieu of veterinarians. 

 Foot and mouth disease is caused by a member of the genus, Aphthovirus. It causes blisters in the mouths and on the feet of cattle, goats, pigs, and other cloven-hoofed mammals. The virus contains a single strand of RNA that encodes its genome.

 Humans are not susceptible to foot and mouth, and the disease generally doesn't kill animals. However, it can greatly reduce milk and meat production, creating a hardship for smallholder farmers. 

 Foot and mouth disease can also have a major impact on a national economy. 

In foot and mouth disease-free countries, an incursion of foot and mouth disease can cause significant losses due to imposed grade restrictions and subsequent control measures required to eradicate the disease.

Bacteria-powered solar cell converts light to energy, even under overcast skies.

Bacteria-powered solar cell converts light to energy, even under overcast skies.University of British Columbia researchers have found a cheap, sustainable way to build a solar cell using bacteria that convert light to energy. Their cell generated a current stronger than any previously recorded from such a device, and worked as efficiently in dim light as in bright light. This innovation could be a step toward wider adoption of solar power in places like British Columbia and parts of northern Europe where overcast skies are common. With further development, these solar cells -- called "biogenic" because they are made of living organisms -- could become as efficient as the synthetic cells used in conventional solar panels.

Transmission of NDM bacteria between dogs and humans established.

Transmission of NDM bacteria between dogs and humans established.The transmission of NDM bacteria between dogs and humans has been established for the first time. In 2015, a New Delhi-metallo-beta-lactamase (NDM) Escherichia coli bacteria was discovered in two Finnish dogs. An article recently published in the journal Eurosurveillance reveals that the dogs' owner did also carry the bacterium. This is presumably the first time in the world that the transmission of NDM-bacteria between a dog and a human has been reported. The NDM-bacteria that had originally been isolated from ear specimens from two dogs in the same family initiated an investigation about the spread and origin of the bacteria. Specimens were also taken from family members and the dogs. The relatedness of the bacteria were investigated by examining the nucleotide sequence of their genome. The study was a collaboration between the University of Helsinki, the National Institute of Health and Welfare, and the Finnish Food Safety Authority Evira.