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Fire ants also sting humans, Frye says, which can cause small pus-filled bumps on the skin, according to the Cleveland Clinic. Other symptoms: Ant bites are typically painful and itchy.
Jellyfish stings can trigger a complex immune response in human skin similar to the response to pathogens or allergens. When jellyfish venom , carried by the stinging cells of the animal ( nematocysts ), comes into contact with the skin, it interacts with various cells and substances in the body.
Parasitic infestations, stings, and bites in humans are caused by several groups of animals belonging to the following phyla—Arthropoda, Chordata, Cnidaria, Nemathelminthes, Platyhelminthes, Annelida, and Protozoa
Plotosus lineatus, commonly known as the striped eel catfish, is a species of eeltail catfishes belonging to the family Plotosidae. Like most other members of the genus Plotosus, they possesses highly venomous spines that they can use to sting when threatened. The venom can cause mild to severe symptoms in humans.
The stinging catfish is able to deliver a painful sting to humans. Poison from a gland on its pectoral fin spine has been known to be extremely painful. This species grows to a total length of 30 cm (12 in), and is an important component of local commercial fisheries. It is also farmed and found in the aquarium trade. [2]
Human encounters with the jellyfish can cause temporary pain and localized redness. [18] In normal circumstances, however, and in healthy individuals, the stings of the jellyfish are not known to be fatal; vinegar can be used to deactivate the nematocysts. If there is contact with a large number of tentacles, however, medical attention is ...
They have the ability to inflict painful stings with venomous spines embedded in their fins. One of the largest species is the blue catfish, Ictalurus furcatus, specimens of which have been found to weigh over 50 kg (110 lb). The maximum length is 160 cm (5.2 ft) in the blue catfish and the flathead catfish. [5]
Isolated reports of scombroid food poisoning in humans caused by histamine present in the tissues of stale or rotten scombroid fish, usually tuna, have occurred over the years. In September 2016, authorities in Singapore intercepted canned tuna imported from Thailand after finding high levels of histamine. [12] No human cases were reported.