Gentle Care Animal Hospital

Gentle Care Animal Hospital

Sunday, July 26, 2009

Tuning In To Your Cat

Anyone who has ever had cats knows how difficult it can be to get them to do anything they don't already want to do. But it seems that the house cats themselves have had distinctly less trouble getting humans to do their bidding, according to a report published in the July 14th issue of Current Biology, a Cell Press publication.

The rather crafty felines motivate people to fill their food dishes by sending something of a mixed signal: an urgent cry or meowing sound embedded within an otherwise pleasant purr. The result is a call that humans generally find annoyingly difficult to ignore.

"The embedding of a cry within a call that we normally associate with contentment is quite a subtle means of eliciting a response," said Karen McComb of the University of Sussex. "Solicitation purring is probably more acceptable to humans than overt meowing, which is likely to get cats ejected from the bedroom." She suggests that this form of cat communication sends a subliminal sort of message, tapping into an inherent sensitivity that humans and other mammals have to cues relevant in the context of nurturing their offspring.

McComb said that she was inspired by her own cat, who consistently wakes her up in the mornings with a very insistent purr. She learned in talking with other cat owners that some of their cats too had mastered the same manipulative trick. As a scientist who already studied vocal communication in mammals, from elephants to lions, she decided to get to the bottom of it.

It turned out that wasn't so easy to do. The cats were perfectly willing to use their coercive cries in private, but when strangers came around they tended to clam right up. Her team therefore had to train cat owners to record their own cats' cries.

In a series of playback experiments with those calls, they found that humans judged the purrs recorded while cats were actively seeking food as more urgent and less pleasant than those made in other contexts, even if they had never had a cat themselves.

"We found that the crucial factor determining the urgency and pleasantness ratings that purrs received was an unusual high-frequency element - reminiscent of a cry or meow - embedded within the naturally low-pitched purr," McComb said. "Human participants in our experiments judged purrs with high levels of this element to be particularly urgent and unpleasant." When the team re-synthesised the recorded purrs to remove the embedded cry, leaving all else unchanged, the urgency ratings for those calls decreased significantly.

McComb said she thinks this cry occurs at a low level in cats' normal purring, "but we think that cats learn to dramatically exaggerate it when it proves effective in generating a response from humans." In fact, not all cats use this form of purring at all, she said, noting that it seems to most often develop in cats that have a one-on-one relationship with their owners rather than those living in large households, where their purrs might get overlooked by poorly trained people.

In those instances, she said, cats seem to find it more effective to stick to the standard meow.

The researchers include Karen McComb, University of Sussex, Brighton, U.K.; Anna M. Taylor, University of Sussex, Brighton, U.K.; Christian Wilson, University of Sussex, Brighton, U.K.; Benjamin D. Charlton, Zoo Atlanta, Atlanta, Georgia, GA.

Source:
Cathleen Genova
Cell Press

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Sunday, July 19, 2009

Rabies: How To Protect Yourself And Your Pets

Rabies is a virus that occurs in mammals and infects the central nervous system; the disease can cause death in humans if it is not treated. Nearly 90 percent of cases occur in wild animals (raccoons, bats, foxes etc.); less than 10% of cases occur in domestic animals like dogs or cats. Humans usually become infected when they are bitten by an infected animal.

Early symptoms of rabies are fever, headache and general malaise. Since these are similar to other illnesses, infected persons often do not seek treatment because they are unaware they have rabies.

Progressive symptoms include:

-- Insomnia

-- Anxiety/confusion

-- Partial paralysis

-- Agitation

-- Hallucination

-- Excess saliva

-- Difficulty swallowing

-- Fear of water

If you have been bitten by any animal you should seek medical care immediately. After possible exposure to rabies, the wound should be washed thoroughly with soap and water. Treatment for someone who has contracted rabies is called post-exposure prophylaxis or PEP. PEP treatment consists of one dose of a substance called immune globulin and five doses of the rabies vaccine over 28 days, both of which help your body fight the virus. Treatment must be given as soon after exposure as possible for the best chance of recovery.

If you see an animal you suspect of having rabies, you should call your local health department or animal control agency. These agencies will have ways to safely remove the animal from the area so that no one becomes infected. Infected animals often display symptoms similar to those listed above and may seem to be acting strangely or seen somewhere outside their normal habitat.

The best way to prevent the spread of rabies is to have all your pets vaccinated against the virus. This will also help prevent them from being infected if they come in contact with an infected animal.

NC Health Info is a guide to reliable health and medical information that links users to local health services throughout North Carolina.

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