EXTERNAL PARASITES
May 25th, 2009 by admin
Off all the problems to which dogs are prone, none is more well known and frustrating those fleas. Flea infestation is relatively simple to cure but difficult to prevent. Parasites that are harbored inside the body are a bit more difficult to eradicate but they are easier to control.
FLEAS
To control a flea infestation you have to understand the flea’s life cycle. Fleas are often thought of as a summertime problem but centrally heated homes have changed the patterns and fleas can be found at any time of the year. The most effective method of flea control is a two-stage approach: one stage to kill the adult fleas, and the other to control the development of pre-adult fleas. Unfortunately, no single against all stages of the life cycle.
LIFE CYCLE STAGES
During its life, a flea will pass through four life stages egg, larva, pupa and adult. The adult stage is the most visible and irritating stage of the flea life cycle and this is why the majority of flea-control products concentrate on this stage. The fact is that adult fleas account for only 1% of the total flea population, and the other 99% exist in pre-adult stages. i.e. eggs, larvae and pupae. The pre-adult stages are barely visible to the naked eye.
THE LIFE CYCLE OF THE FLEA
Eggs are laid on the dog, usually in quantities of about 20 or 30, several times a day. The female adult flea must have a blood meal before each egg-laying session. When first laid, the eggs will cling to the dog’s fur, as the eggs are still moist. However, they will quickly dry out and fall from the dog, especially if the dog moves around or scratches. Many eggs will fall off in the dog’s favourite area or an area in which he spends a lot of time, such as his bed.
Once the eggs fall from the dog onto the carpet or furniture, they will hatch into larvae. This takes from one to ten days. Larvae are not particularly mobile, and will usually travel only a few inches from where they hatch. However, they do have a tendency to move away from light and heavy traffic under furniture and behind doors are common places to find high quantities of flea larvae.
The flea larvae feed on dead organic matter, including adult flea faeces, until they are ready to change into adult fleas. Fleas will usually re,aom as larvae for around seven days. While inside the pupae, the larvae will undergo adult fleas. This can take as little fleas can remain inside the pupae waiting to hatch for up to two years. The pupae are signaled to hatch by certain stimuli, such as physical pressure-the pupae’s being stepped on, heat from an animal lying on the pupae or increased carbon dioxide levels and vibrations – indicating that a suitable host is available.
Once hatched, the adult flea must feed within a few days. Once the adult flea finds a host, it will not leave voluntarily. It only becomes dislodged by grooming or the host animal’s scratching. The adult flea will remain on the host for the duration of its life unless forcibly removed.
DID YOU KNOW?
Never mix flea control products without first consulting your veterinary surgeon. Some products can become toxic when combined with others and can cause serious or fatal consequences.
DID YOU KNOW?
Flea-killers are poisonous. You should not spray these toxic chemicals on areas of a dog’s body that he licks, on his genitals or on his face. Flea killers taken internally are a better answer, but check with your vet in case internal therapy is not advised for your dog.
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