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Once ingested by the cat as eggs, they can hatch into larvae and these feline roundworms larvae travel through the body until they eventually reach the lungs. They can then make their way up the wind pipe where they are coughed up and then re-swallowed. Once re-ingested, the larvae pupate into full adult roundworms and move into the intestines. The adult feline roundworms then produce many, many eggs which are then passed in the cat's feces. The eggs are very hardy and can survive for months or even years once in the cat's feces.
Oftentimes the larvae will halt their migration and remain in the liver, where they go into a dormancy period. In a pregnant female cat, the larvae become active once again and can be secreted in the mother cat's milk after giving birth. This is how the kittens can them become infected with feline roundworms. Toxascara leonina Toxoscara leonina is another species of feline roundworm that is:
Toxascara leonina’s life cycle is less complex in that the eggs are shed in the feces. They can then develop into adult roundworms in the cat’s intestines where they will then distribute more eggs. The eggs are not as hardy as they are viable and ineffective only several days to several weeks in an environment. Usually cats are infected with Toxascara leonina from eating an infected rodent. |
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