Health
Organic vegetables found to be contaminated with “bacteria that cause harmful diseases”
New research warns that organic vegetables are often contaminated with bacteria that cause harmful diseases. According to scientists, people who buy agricultural products treated with organic fertilizers, such as fertilizers, can live to regret their choices.
More than 50 potentially harmful bacteria were found in organic spinach and lettuce samples. Organic fruits and vegetables are becoming more and more popular as more people eat healthy diets and avoid pesticides, fertilizers and herbicides.
But now, Spanish scientists have discovered that they may be contaminated with harmful bacteria from humans and animals. These can be transferred to vegetables during growth, harvesting, transportation, processing and handling.
Vegetables in particular may contain unicellular organisms such as free-living amoeba (FLA), which feed on bacteria. Some bacteria are very harmful to humans. These nasty bacteria, called Trojan horses, resist the digestion of organisms and pose a serious threat to those who eat them.
Dr. Yolanda Moreno of the University of Valencia, Polytechnica de Valencia, said: Their role in the transmission of vegetable and human pathogens. “
Samples of lettuce and spinach were collected from a local supermarket in Valencia between November 2020 and May 2021. Later, special science and technology was used to identify the bacterial DNA found inside the amoeba.
The main types of bacteria identified are Flavobacterium and Pseudomonas, which generally do not cause disease in humans. However, 52 harmful bacteria were found in one-third of the samples, including Legionella, Salmonella, and Arcobacter.
These can cause serious illnesses such as pneumonia and gastrointestinal disorders. Another species called Vermamoebavermiformis, which often causes severe infections, was found in one-fifth of the vegetable samples. Acanthamoebacastellanii, a bacterium that can cause blindness and encephalitis, was also recorded in nearly two-thirds (63%) of the samples.
Dr. Moreno said: “Bacteria of public health concern in free-living amoebas can reach humans through contaminated organic vegetables and easily infect pathogens that can cause health problems. It suggests that it is a medium. Treat the soil with organic fertilizers such as fertilizers and sewage sludge and irrigation water. “
A deeper understanding of the quality and safety of organic vegetables requires extensive research from different countries. Dr. Moreno said: “Leaf vegetables are especially susceptible to fecal contamination because they are close to the ground and can be consumed by humans without cooking. Our results are safe and appropriate for fresh organic vegetables. It also emphasizes the need to educate the general public about proper handling. Eat fresh or slightly cooked. “
The findings were to be presented at the European Conference on Clinical Microbiology and Infectious Diseases (ECCMID) in Lisbon, Portugal.
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