Milk powder problems occur year after year. But it seems that this year is especially serious. A French infant formula contaminated by non-pathogenic microorganisms. Different brands of milk powder from American milk company whose whey powder contaminated by Salmonella, and Irish formula milk contaminated by Salmonella...
Nestle NAN detected excessive bacteria in many batches of milk powder. Chile's Ministry of Health issued a warning on July 27 that Nestle's brand NAN premature formula milk powder had been detected to exceed the standard of bacteria. This time, a total of 1,092 cans of milk powder were involved, which were introduced into the market in May and June respectively. The batch number of the bacteria exceeding the standard is L80190346AH.
At that time, there were four cases of discomfort caused by eating the product, but no direct relationship between the illness and the problem milk powder was found. For safety reasons, Chile's Ministry of Health urged consumers to stop eating the product immediately. Recently, the Ministry of Health of Chile tracked 10 other batches of Nestle NAN products on the market and found that the batches of L80480346AT and L72080346AB also exceeded the standard of bacteria. The batches of L72080346AB infant milk powder detected Staphylococcus aureus exceeded the standard.
Bacteria have been detected to exceed the standard many times. To protect the baby's health and prevent the bacteria infection by eating milk powder, the Ministry of Health of Chile once again issued an alarm and called for a complete ban on the consumption of Nestle NAN infant milk powder. If there are purchased users, they can be replaced the milk powder in the local health department.
We often hear that milk powder is urgently recalled by bacterial contamination. Generally, bacteria will cause milk powder to be contaminated and lead to milk allergic. Let's explore!
1.Botulinum toxin
Botulinum toxin is a Gram-positive bacterium that grows in normal temperature, low acid, and hypoxic environment. Botulinum toxin, one of the most toxic bacteria, can grow in canned or vacuum-packed foods that are improperly processed, packaged and stored. Botulinum toxin is a lethal germ that secretes botulinum toxin during reproduction. Botulinum toxin is the most potent toxin known at present. Botulinum toxin is particularly resistant to acid. The gastric acid solution can not destroy it within 24 hours, so it can be absorbed by the gastrointestinal tract. But botulinum toxin is not heat-resistant.
The symptoms of poisoning are symmetrical cranial nerve damage symptoms. Such as blurred vision, drooping eyelids, dilated pupils, speech disorders, dysphagia, dyspnea. If it continues to develop, it may cause the Breathing Muscle Paralysis so that respiratory failure and death.
2.Salmonella
The Salmonella which contaminated the milk powder is a common foodborne pathogen that can be transmitted through meat, eggs, food processing, transportation, and sale, as well as through convalescent patients and asymptomatic carriers.
If the baby is infected with Salmonella, the main manifestation is acute gastroenteritis symptoms. The incubation period of this bacterium is generally four to forty-eight hours. The symptoms at the beginning of the infection are nausea, headache, general fatigue, and chills. The main symptoms are vomiting, diarrhea and abdominal pain and The stool is a yellow-green water-like stool, sometimes with pus, blood, and mucus. The temperature of fever is generally above 38 C. The general course of the disease is 3 to 7 days. But some patients, especially children, have symptoms of chills, convulsions, convulsions, and coma when they are seriously ill. If they are not treated in time, they may die. So we should pay attention to Salmonella infection.
3. Enterobacter Sakazakii
Enterobacter Sakazakii, also known as Enterobacteriaceae, can cause severe neonatal meningitis, enterocolitis, and bacteremia of the newborn baby, with a mortality rate of more than 50%. At present, microbiologists do not know the source of Enterobacter Sakazakii contamination, but many case reports show that infant formula milk powder for babies is the main source of infection currently found.
4.Escherichia coli
E. coli O157H7 mainly causes human infection by contaminating food. The pathogenicity and resistance to gastric acid of E. coli O157H7 are strong and destructive to cells. Therefore, infectious diarrhea caused by E. coli O157H7 is classified as a food-borne disease in many countries. More than 70% of reported outbreaks around the world are related to eating suspicious foods.
Animal-derived foods, such as beef, chicken, milk and dairy products, are the main factors for the transmission of E. coli O157H7 through food. Especially in the process of animal slaughter, these foods are more susceptible to bacterial contamination parasitic in the intestinal tract of animals. In addition, the contamination of vegetables and fruits by E. coli O157H7 can also cause the outbreak of E. coli infection.
5.Staphylococcus aureus
Staphylococcus aureus is a common food-borne pathogenic microorganism. Enterotoxin produced during its reproduction is the pathogenic factor of food poisoning. The optimum temperature and pH for the growth of the strain were 37 C and 7.4. The strain was salt-tolerant and could grow in an environment with a salt concentration close to 10%. Staphylococcus aureus is often parasitic in human and animal skin, nasal cavity, throat, intestine and stomach, carbuncle, purulent mouth; air, sewage, and other environments are ubiquitous.
The incubation period of Staphylococcus aureus is 1-6 hours, and the symptoms of dizziness, vomiting, and diarrhea occur. Generally, it can recover by itself in 1-2 days. Severe can cause other parts of the infection, such as pneumonia, endocarditis, and even cause sepsis, causing systemic infection.
6. Aflatoxin
Aflatoxin is a highly toxic substance. The harmfulness of aflatoxin is its destructive effect on human and animal liver tissues, which can lead to liver cancer and even death in severe cases. China has the highest allowable content of aflatoxin in the milk and its products (sterilized milk, fresh raw milk, whole milk powder, evaporated milk, sweet condensed milk) and butter fresh pig tissue (liver, kidney, blood, and lean meat) is 0.5 g/kg (aflatoxin M1). Aflatoxin is difficult to remove because of its high temperature and acid resistance.