Fleas are a common external parasite associated with dogs. They cause severe itching and inflammation of the skin, leading to dermatitis. They are the intermediate host for the Tapeworm most common in dogs. If fleas are a problem, it is necessary to treat all animals in the household (both cats and dogs) to clean the environment. You may also want to ‘flea bomb’ the house to remove any eggs and to stop the cycle. Preventative programs are best achieved using “spot on” products that have a prolonged residual effect, usually 30 days. However it is strongly advised to consult your Vet or chat with the RSPCA's friendly Vet nurse team for free advice about the most suitable product for your pet.
Combination products can be cheaper than buying them separately. On the other hand, it can be difficult to compare the cost of combined products with separates, because it depends on the ingredients (for example, newer and potentially more effective flea treatments are more expensive than older ones) and the cost of supplying what's missing – there's no all-in-one that covers everything. And that's before you take the cost variations from retailer to retailer into account.
Fleas are most common in warm humid areas, and while more prolific in summer, they are found year-round in many parts of Australia. Flea bites cause discomfort and distress through itching, and some dogs and cats can develop hypersensitivity or an allergy. Fleas also host tapeworms, infecting your pet if they eat them. Most dogs and cats need flea treatment – indoor cats may be an exception.
There are various intestinal worms that can infect dogs and cats, with hook worms, round worms (ascarids), whip worms (mainly in dogs) and tapeworms being the main groups. Symptoms can include diarrhoea, bloody stools, weight loss, anaemia, pot belly, dry hair and/or general poor appearance. If left untreated, worm infestations can be fatal. Worms can be picked up from the mother (either in utero or via milk), from the environment (infected stools), from eating infected prey (lizard or mouse), or, in the case of tapeworms, from fleas. Worms can also be transmitted to humans.
Giardia intestinalis and Giardia duodenalis are single celled protozoan parasites, which inhabit the affected dog’s small intestine, causing clinical signs of Gardiasis. The protozoa attach themselves to the intestines and multiply. They may be directly swept through the intestines and appear in the infected dog’s faeces or they may develop into a tougher more durable ‘cyst’ form, which is again passed in the dogs faeces but is able to survive for long periods in the external environment. Dogs are infected by ingesting the cysts from contaminated water and the environment. Infected dogs may not show any clinical signs of Gardiasis, but they can still shed the protozoa from their systems, spreading the infection to other healthy animals.   Infection and subsequent illness is more commonly seen in younger animals. Signs of infection include: chronic or intermittent diarrhoea that may appear ‘fatty’ and slimy, accompanied by a very foul smell. Weight loss is also possible if left untreated.
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