Виды вирусных заболеваний Виды вирусных заболеваний человека ,животных и растений.Вирусы очень малы – их размеры колеблются в пределах от десятков до тысяч нанометров. Вирусы представляют собой минимальную форму жизни (впрочем, о том, насколько можно относить вирусы к формам жизни, до сих пор ведутся споры), являясь неклеточными организмами.Вирус Герпеса Герпесвирусы -это большое семейство ДНК-содержащих вирусов, вызывающее разнообразные болезни не только у человека и других млекопитающих, но и у птиц , рептилий, амфибий, рыб. Герпесвирусами заражено большинство населения нашей планеты. При ухудшении состояния организма (простуда, стресс, утомление) вирус даёт о себе знать болезнью. Примером может служить герпетические высыпания на губах при «простуде». Развитию заболевания переохлаждение, снижение сопротивляемости организма. Возможен герпес и в жаркое время при перегревании организма.Наиболее часто вирус поражает: кожу, глаза, слизистые оболочки лица, центральную нервную систему (энцефалит, менингит).Вирус гриппа. Грипп— острое инфекционное заболевание дыхательных путей, вызываемое вирусом гриппа. Входит в группу острых респираторных вирусных инфекций (ОРВИ). Периодически распространяется в виде эпидемии. В настоящее время выявлено более 2000 вариантов вируса гриппа. Вирус гриппа.Вирусные болезни растений. Заболевания растений, вызываемые вирусами. Поражают представителей различных семейств цветковых растений, хвойных, папоротников, водорослей и грибов. Часто резко снижают урожай и его качество. Такие болезни как :мозаики и желтухи.Основной симптом мозаик — мозаичная (неравномерная) окраска листьев, обусловленная нарушениями в пластидном аппарате клеток. Из болезней этой группы наиболее вредоносны: мозаика табака, мозаика и стрик томата, морщинистая и полосчатая мозаики картофеля, мозаика свёклы и др. Вирус табачной мозайки .
Сommunication tools, which are almost always available and relatively easy to use, greatly facilitate our communication.The exchange of information can take place in just a few seconds, which is extremely convenient and economical both in terms of time and money. Previously, in order to, for example, contact a person with whom you can not meet in reality, you had to use traditional mail, which is sometimes just inconvenient, and, moreover, slow and expensive (compared to free mail services on the network). In addition, the parcel could get lost, get damaged on the way - the human factor could also play a cruel joke with the recipient and sender - so such a dialogue at a distance could last for many years, but, at the same time, contain no more than a dozen replicas. There is almost no hope that the email you sent will get lost or get damaged "on the road", so if your message remains unanswered, it is much more likely that the recipient simply ignored it, rather than "loss in the Network" or any other problems.
One of the disadvantages of "fast communication" is the devaluation of the language, which has already become widespread illiteracy of Internet users, often developing into a disaster of catastrophic proportions. And yet, if the designated user did not have the opportunity to show the world their knowledge of the language, no one would have known about his success - apparently, and his school teacher - which suggests that it is not necessarily the speech "became poor" with the advent of communication tools: just the means of communication gave us the opportunity to contact someone, Yes, creating a similar problem.
What are the advantages?
Сommunication tools, which are almost always available and relatively easy to use, greatly facilitate our communication.The exchange of information can take place in just a few seconds, which is extremely convenient and economical both in terms of time and money. Previously, in order to, for example, contact a person with whom you can not meet in reality, you had to use traditional mail, which is sometimes just inconvenient, and, moreover, slow and expensive (compared to free mail services on the network). In addition, the parcel could get lost, get damaged on the way - the human factor could also play a cruel joke with the recipient and sender - so such a dialogue at a distance could last for many years, but, at the same time, contain no more than a dozen replicas. There is almost no hope that the email you sent will get lost or get damaged "on the road", so if your message remains unanswered, it is much more likely that the recipient simply ignored it, rather than "loss in the Network" or any other problems.
One of the disadvantages of "fast communication" is the devaluation of the language, which has already become widespread illiteracy of Internet users, often developing into a disaster of catastrophic proportions. And yet, if the designated user did not have the opportunity to show the world their knowledge of the language, no one would have known about his success - apparently, and his school teacher - which suggests that it is not necessarily the speech "became poor" with the advent of communication tools: just the means of communication gave us the opportunity to contact someone, Yes, creating a similar problem.