Diphtheria is an acute, life-threatening, infectious disease. Children aged 3–7 years are most susceptible to it; in recent years, the incidence of adolescents and adults has increased.
Diphtheria is an acute, life-threatening, infectious disease. It proceeds in the form of acute inflammation of the upper respiratory tract, mainly the pharynx (approximately 90% of cases), the nose, the skin at the sites of damage, eyes or genitals.
The main threat, however, is not inflammation, but poisoning with a toxin, which is produced by the bacterium, the causative agent of the disease, while the cardiovascular and nervous systems are mainly affected.
The causative agent of diphtheria and infection
The causative agent of diphtheria is Corynebacterium diphteriae – gram-positive bacteria in the form of sticks with characteristic bulbous thickenings at the ends, which are placed in pairs in swabs, at an angle in the form of a Roman numeral V with respect to each other. Diphtheria bacilli secrete diphtheria toxin, the enzyme neuraminidase and other biochemically active compounds in the process of life. Continue reading
How do you want to turn off the persistently ringing alarm clock in the morning. And even the melody, which once seemed pleasant, now causes only irritation. A familiar condition? This is the lot of many owls, those who like to go to bed well after midnight and who absolutely do not want to get up in the morning.
Many somnologists (doctors who study sleep problems) believe that “owls” simply do not exist. It’s a habit. And if it’s hard for you to get up in the morning today, then after a while you will be able to learn how to easily and cheerfully get out of bed with the first rays of the sun. Do not believe? Check it out.
The biological clock and its effect on sleep
Since ancient times, a person woke up with the first rays of the sun and fell asleep when it began to get dark on the street. This mode of life corresponds to the internal biological clock. By the way, circadian rhythms (changes in the intensity of biological processes in accordance with the time of day) are inherent not only to people, but also to animals and even flowers. Remember how in the morning the bud opens, and in the evening the petals begin to close. Continue reading