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How dangerous is psittacosis? Veterinary laboratory
Pathogen — neorickettsia (chlamydia), in their evolutionary development they are between bacteria and viruses.
The source of infection is often a sick bird — a virus carrier, releasing the microorganisms from nasal mucus, sneezing, coughing, with the dung. Infection occurs by airborne and alimentary, particles of dried droppings from sick birds, downs, slomannye the epithelium of the skin can get into the lungs, air sacks of birds and gastro-intestinal tract and there penetrating through the mucous membranes, causing the disease. A bird ill with psittacosis, usually for a long period of time remains a virus carrier.
Reservoir and source of infection for humans are domestic and wild birds. The largest epidemiological significance have Pets poultry (especially ducks and turkeys), room birds (parrots, wavy parrots, Canaries and other small songbirds) and especially urban pigeons and crows, the infestation of which ranges from 30-80%.
Ill persons who are constantly in contact with birds (poultry workers, meat processing plant, breeders of birds, etc.) the Ill person primarily middle-aged and older, children get sick much less often. Patients with psittacosis not a danger to others represent. In the human body, the pathogen enters mainly through the mucous membranes of the respiratory system. Infection occurs by inhalation of dust containing chlamydia (dried particles of bird faeces and discharge from the beak, contaminated particles down, etc.). Continue reading
The biggest cat in the world
The cat is now one of the most popular Pets. The so-called animal companion. Once thought that the domestic cat is a separate species. In fact, this predator, is a mammal of the cat family. Now familiar to all of us the cat is considered as a subspecies of forest cat. It was domesticated about 10 thousand years ago. According to some data, today, worldwide, there are about 600 million pet cats. They all belong to one of 256 species. This long-haired (Persian cat) and a fully bald (Sphynx). And all so different.
Cats grow all different. Relating to size. The smallest cat breed Singapore. An adult animal reaches 2 pounds of weight. By the way, they entered in the Guinness Book of records as the smallest. But for the title the barley house cat fighting two breeds. This is Asher and Maine Coon (Maine Coon cat). For a long time the Maine Coon held the palm. Mature males of this breed can weigh up to 10 pounds. And externally the animal looks like a lynx, he has the same ear tufts and tiger feet. There are similarities and Ocheretyany kit. However, unlike wild cousins, the Maine Coon is quite friendly. Continue reading
How birds foretell rain
Feathered inhabitants of the globe can not only delight us with their beauty and wonderful singing. They are able to predict the rain. so much so that some weather forecasters should learn at them. No wonder there are a lot people’s will and Proverbs about the weather-related behavior of the birds.
Our ancestors had no Internet, no TV with the weather forecast, so they had to observe nature and its inhabitants, they succeeded. Modern climatology, with good technical and research base also does not ignore the “predictions” of birds, and finds scientific confirmation of national signs.
Why birds can predict the rain?
Birds have a very well developed senses, so they can not only perfectly oriented in space, but also to catch the slightest changes in atmospheric pressure, humidity and temperature of the air, to feel the weakening of solar radiation and the decrease in light when the first clouds before the rain .
Birds are sensitive to changes in the electric field before thunder storm and rain. All birds feel that people can notice, carefully observing them.
“Birds are the barometers” predicting rain:
Perhaps the most famous signs: swallows fly low during the day – soon it will rain. Indeed, before the rain insects, which pitulski, do not rise high above the ground, and over them the swallows and Swifts also have to reduce altitude. Continue reading
