In a note it is a question of Merezhkovsky and Isachenko’s which have formed a basis of development of a method of fight against myshevidny rodents the bacteria.
In 1893 With
In 1893 S. S. Merezhkovskim and in 1897 of B.L.Isachenko were allocated from corpses of rodents the bacteria which have formed a basis of a method.
As a result of the subsequent ordering they were carried to a type of Salmonellaenteritidis:
– Isachenko’s bacteria – Salmonella enteritidis var. Issathenko,
– Merezhkovsky’s bacteria – Salmonella enteritidis var. Mereschkovski.
Small myshevidny rodents are most susceptible to the above-stated activators: mice, voles, hamsters, pestrushka. Are less susceptible – rats, gophers, sandworts, groundhogs, jerboas. And for the person these activators aren’t dangerous to other animals. It is necessary to note disastrous action ultra-violet (including solar) radiations on Isachenko, Merezhkovsky’s salmonella. From here such reception of application, as a preparation apportion in a mink of rodents with the subsequent pritaptyvaniye.
Development of a disease proceeds as bryushnotifozny infections.
The incubatory period makes 3-5 days from the moment of infection. Sick small animals are tousled, inactive, don’t eat. Eyes slezyatsya, suppurate. Limfouzla are increased.
The activator is localized in liver and a spleen which are expanded, with a distinct ochagovy necrosis is in heart, blood, lungs, intestines – is strong istonchen, dilution of fabrics is observed, plentifully allocated with urine, a dung. The death of rodents attacks 2-7 days after an onset of the illness. Their corpses contain an activator large quantity. At temperatures below bacterium zero well remain till 20 days, without losing a virulentnost.
Main ways of a transmission of infection: through the polluted forage, contacts of healthy small animals with infected, with the infected dung. Infection by means of a cannibalism (eating of corpses of the fallen small animals) that serves during mass flashes of number of rodents takes place also.
V. Permyakov, chief of the State inspection of protection of plants of AR Crimea.