We need to start dealing with fleas. I do see a lot of resistant tapeworm cases and I strongly recommend my clients to go over with the below recommendations :
From the Veterinary Partner :
Eggs are laid in the hair coat and are designed to fall off the host. They are resistant to insecticides, but susceptible to various insect growth regulators. Larvae develop in the host’s environment and feed on adult flea feces (blood) that fall out of the hair coat of the pet. Larvae are susceptible to traditional insecticides, borates and insect growth regulators. Larvae eventually spin cocoons (often within carpet fibers) for pupation. Pupae are resistant to freezing, desiccation, and insecticides. Pupae can lie dormant for many months; they are stimulated to expupate as emergent adults by vibration, warming and increased carbon dioxide. Normally, expupation occurs when a host is near and the new flea finds the pet within seconds of emergence. Emergent fleas are fairly mobile and can survive a few days without a host, if in a suitable environment. New fleas begin feeding within hours of finding a dog or cat. Once a blood meal has been taken, the flea can survive only a short time if it is dislodged from the host. New fleas experience very high mortality on healthy adult hosts. Most fleas do not survive 72 hours on an animal that is itching and able to groom itself.This is the life cycle of the flea and it must be broken . You need to treat your house too. There is a company called flea busters. If you can find one close buy you can talk to them or get their products to use at your house.Unless yo get rid of these fleas you will have this problem.
On the other hand I would get these two cats to dewormed with original DRONCIT by your vet. Some OTC generic praziquantel products may not work.
There also is another parasite exactly look the same with tapeworms. It is called
Spirometra mansanoides . There are not much information about these parasites since they mostly seen in Opossums and raccoons . They also reported to be found in cats .And it needs to be treated with large amount of Praziquantel but only by your veterinarian.
I still think your cats have flea problem as well as your house and the both needs to be taken care of.
The above is given for information only. I can not prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet condition I would strongly advise consulting your veterinarian.
I hope this helps.If you need to ask more questions please do not hesitate to ask