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They found that low levels of antibiotics in the animal's environment improved the survival of antibiotic-resistant bacteria in its gut. Pixabay

Even negligible levels of antibiotics in chicken blood can cause bacterial resistance and sicken people with hard-to-treat infections, suggests new research based on a study of antibiotic resistance in leech’s gut.

Microbiologists have long known that the overuse of antibiotics in people and animals leads to antibiotic resistance or the proliferation of germs that do not respond to usual treatments.


Antibiotic resistance can develop in the environment, too, as hospitals and pharmaceutical companies create favorable conditions for resistance by discharging large quantities of medications.

But what concentration of antibiotic exposures boost the growth of resistant microbes in the wild? The new study, published in the journal mBio, suggests the threshold is low.

The researchers found resistant bacteria thriving in leeches exposed to less than four-hundredths of a milligram, per millilitre, of ciprofloxacin, an important antibiotic, in the environment.


Microbiologists have long known that the overuse of antibiotics in people and animals leads to antibiotic resistance or the proliferation of germs that do not respond to usual treatments. Pixabay

That level represents less than one per cent of the “clinical resistance breakpoint,” or concentration in the gut that selects for resistance.

For the study, the international team of researchers took a deep dive into the microbiome of blood-sucking medicinal leeches.

They found that low levels of antibiotics in the animal’s environment improved the survival of antibiotic-resistant bacteria in its gut.

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Those resistant bacteria, in turn, displaced healthy bacteria.

The findings could help explain why antibiotic resistant infections have been found in patients who undergo medicinal leech therapy.

In addition, “it suggests that contamination with very low levels of antibiotics in other environments can lead to the increase in resistant bacteria,” said microbiologist Joerg Graf at the University of Connecticut in the US who led the study. (IANS)


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Photo by Rob Pumphrey on Unsplash

Basil Leaves

Basil scientifically called Ocimum basilicum, and also known as great basil, is a culinary herb from the Lamiaceae (mints) family. A common aromatic herb, it is usually used to add flavor to a variety of recipes, but what may astonish one is that there are various health benefits of basil that make it well-known for its immunity-enhancing properties.

Basil seeds or basil essential oil are proven to help prevent a wide range of health conditions, which makes it one of the most essential medical herbs known today. Basil has vitamin A, C, E, K, and Omega 3 components including cooling components too. It also contains minerals like Copper, Calcium, Manganese, Phosphorus, Zinc, and Potassium. An ancient Ayurvedic herb, basil has various proven benefits including being anti-inflammatory, ant-oxidant, immune-booster, pain-reducer, and blood vessel-protector.

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This herb also contains cooling components thus making it really helpful for summers. It detoxifies the body and maintains one's body temperature pace. Adding to the benefits Basil contains antioxidant-rich volatile essential oils, which are considered hydrophobic, meaning they don't dissolve in water and are light and small enough to travel through the air and the pores within our skin. Basil's volatile essential oil is something that gives the herb its distinct smell and taste, but basil contains some great healing properties.

In the long history of Ayurveda, basil seeds were also called tukmaria seeds. These seeds may support one's gut health, may complete one's fiber quota, reduce blood sugar, help in weight loss, and also reduce cholesterol.

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When you're pregnant, the immune system is seeing the placenta for the first time in decades.

The US researchers have discovered a class of immune cells that plays a role in miscarriage, which affects about a quarter of pregnancies.

Researchers at the University of California-San Francisco found that the recently discovered subset of cells known as extrathymic Aire-expressing cells in the immune system may prevent the mother's immune system from attacking the placenta and fetus.

The researchers showed that pregnant mice who did not have this subset of cells were twice as likely to miscarry, and in many of these pregnancies fetal growth was severely restricted.

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"When you're pregnant, the immune system is seeing the placenta for the first time in decades -- not since the mother made a placenta when she herself was a fetus," said Eva Gillis-Buck, from UCSF.

"Our research suggests that this subset of immune cells is carrying out a sort of 'secondary education' -- sometimes many years after the better-known population of the educator cells have carried out the primary education in the thymus -- teaching T cells not to attack the fetus, the placenta and other tissues involved in pregnancy," she added. The findings are published in the journal Science Immunology.

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