Can oysters be eaten raw?

Oysters can be eaten raw, but they are generally popular in western food. If they are not cleaned, they may be eaten with bacteria, which may easily cause diarrhea.

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Compared with similar foods, the cholesterol, calcium, iron, phosphorus, magnesium, manganese, sodium, zinc, selenium, copper and vitamin B2 of oysters are higher than the average level. Oysters are rich in protein, zinc, omega-3 fatty acids and tyrosine, and their cholesterol content is low. Among them, the zinc content is extremely high, which helps to improve male sexual function. Note: The zinc content of six oysters is twice the daily requirement. If oysters are not fresh, it is easy to cause food poisoning.

Oysters, also known as "milk in the sea". It is rich in protein and zinc that human body lacks. Eating oysters can prevent dry skin, promote skin metabolism and decompose melanin. It is a rare beauty product.

However, the US Food and Drug Administration (FDA) believes that oysters are the most risky food. Because it contains two destructive pathogens: norovirus and Vibrio cholerae. Norovirus may cause gastroenteritis. Vibrio cholerae can cause high fever, septic shock, skin ulcers and blisters, and even fatal septicemia. "

1. Crassostrea gigas: The shell is large and thick, oblong or rectangular, and the dorsal and ventral edges are almost parallel, and the shell length is generally three times the height of the shell; Shell length: the left shell is 30 ~ 35cm, and the right shell is 22 ~ 30 ~ 35cm. Shell height: 9.5 ~ 10 cm for the left shell and 8.5 ~ 9.5 cm for the right shell. The right shell is flat as a cover, and the scale outside the shell is thick.

From the top of the shell to the back edge, it is annular, corrugated and sparsely arranged, but tends to heal without longitudinal folds; The shell surface is flat or has several depressions, lavender, grayish white or yellowish brown; The inner surface of the shell is porcelain white, with or without ribs; There are no small teeth on both sides of the top of the shell. The adductor muscle has a large scar, which is hoof-shaped, white, purple-brown or yellow. , located on the back of the housing.

The left shell is slightly concave or deep, and the scales outside the shell are thicker than the right shell, but the shape is the same; There is a wide and long ligament groove at the top of the inner surface of the shell, the length of which is more than twice the width. Same color as the right shell, odorless and slightly salty.

2. Oyster near the river: the shell is large and thick, with round, oval, triangle and long shape. Shell length: left shell 13 ~ 24 cm, right shell 12 ~ 24 cm. Shell height: 9 ~ 15 cm for the left shell and 8.5 ~ 14 cm for the right shell. The right shell is smaller and slightly flatter than the left shell, and the outer surface of the shell is surrounded by concentric scales.

The shape changes with age. The scales of one to two-year-old individuals are flat and fragile, and some are free. The scales of two to several-year-old individuals are flat, and some are wavy or microwave-like. Perennial individual scales are complete, layered and as thick as stone. Shell masks are gray, blue, purple, brown and other colors.

The inner surface of the shell is white, some edges are grayish purple, toothless, the muscle scar of the closed shell is large, kidney-shaped or semi-circular, purple-black, located at the rear of the middle. The left shell is bigger and thicker than the right shell, and the concentric scales are similar to the right shell, but there are fewer layers. The inside of the shell is white, and some are gray-purple around it.

Although oysters are delicious, they will seriously affect our health. The US Food and Drug Administration issued a warning to remind people not to eat oysters. Because this seafood may be infected by viruses such as Novak.

Reference: Baidu Encyclopedia-Oysters