Listeriosis is after septicemia, and visceral organs and central nervous system associated with the offerings of acute infectious diseases, the threat of significant industry support Fox.
Pathogen: rounded at both ends of the bacteria, a small straight or curved bacteria, can not form a capsule and spores, long one to two microns wide and 0.2 microns -0. 4 microns thick in most cases was there a separate bar , or into a "v" shape, or form a short chain, with a flagellum, can exercise, stained Gram-positive.
The bacteria are aerobic and anaerobic bacteria and the culture temperature of 37 degrees Celsius, the hydrogen ion concentration 63. 09-100 Namo / l (ph7-7. 2). Can grow in normal medium, in the liver and liver soup soup grew well on agar, round, smooth and flat, thick refractive transparent colonies observed was milky yellow, blood agar, showing b-type hemolysis, in the flesh soup slightly turbid, forming a deep yellow granule.
Listeria has a strong resistance, autumn and winter period of five months in the soil can hold more than saved in the ice within three to five months. Save months in the oats. Four to seven months in preservation, including bone meal, hides the save in the sixty-two to ninety days, the body preserved in one five to four months without losing vitality.
The relatively strong resistance to high temperature bacteria, a hundred degrees Celsius, the CA to thirty minutes, thirty minutes after death of seventy degrees C, with agar broth culture system, in the sixty to seventy degrees Celsius by five to ten minutes, Sixty-five degrees Celsius in one hour of death, 2.5 percent carbolic acid solution for five minutes, 2.5% caustic soda solution, twenty minutes, 2.5% formaldehyde solution and twenty minutes, 75% of the minutes of being killed. In 0.25% phenol preservative fluid in the blood can survive more than a year.
Symptoms: prevalence in young arctic fox, the spirit and excitement alternating depressed, loss of appetite, or poor feeding, performance excitement ataxia, rear sway, incomplete paralysis of hind limbs, masticatory muscle, neck muscle and occipital muscle tremors , was spasmodic contraction, resulting in neck bent or twisted to one side and sometimes stretched forward, or upward, sometimes going around, this time rattling around sick fox, when the feed feed, of the jaw, neck muscles spastic contraction, from the mouth, out of viscous liquid. Often appear conjunctivitis, Mianyang dysentery and vomiting. Found in the stool light gray mucus or blood. Adult foxes sometimes a cough, difficulty breathing, abdominal breathing was. Fox duration from on_set_ of symptoms he was seven to twenty-eight days from death.
Sometimes the performance of systemic failure fox disease, often hiding in the clo_set_. Some of encephalitis symptoms.
Diagnosis: According to the flow and epidemiological, clinical and pathological anatomical changes, combined with bacteriological examination can confirm the diagnosis. However, with the Pasteurella disease, meningitis and other diseases to distinguish canine distemper. <br> Control: The Listeriosis is currently no effective treatment. Mainly to strengthen the disease prevention, especially in conditions of listeriosis are sexually transmitted diseases in indigenous soil bacteria breed in the rainy season to strengthen the anti-business to improve the feeding and management. |