Insects And Disease Transmission
July 5, 2017|Posted in: Business Services
Broadly, there are two quite different methods by which disease organisms have exploited insects as a means of conveyance.
Biological or cyclic transmission
This is the much more sophisticated and highly evolved method, whereby the insect vector plays a specific and quite necessary role in the life cycle of the disease organism. Such as Malaria, Dengue fever, encephalitis etc.
Mechanical or Passive transmission
The insect carrier becomes internally or externally contaminated with the disease by feeding or walking on infected material and then contaminates food or food-handling facilities. Diseases transmitted in this way include dysentery, hepatitis, gastroenteritis and salmonella food poisoning, to mention only a few from a very long list.
In the case of the mechanical transport of disease organisms, it is important to note that the insects are, for the main part, only accused, not convicted in relation to their role in disease transmission. For many of the cyclically transmitted diseases, insects have been charged and proven guilty. The evidence against insects as mechanical carriers of diseases remains on circumstantial. Perhaps the main reason for this difficulty is the multitude of their means of transmission that may exist concurrently. It is likely, although arguable, that many cases of bed rashes are caused by insects such as bed bugs.
In some countries, it can be rather easy to become complacent about the presence of insects that may be harboring enormous numbers of disease organisms. They are not geographically located within areas that are the domain of the many cyclically transmitted diseases. Moreover, these countries feel their society has high standard of sanitation and hygiene, so that the water supplies are clean and entirely separate from human wastes.
However, such complacency is misplaced; for despite the most modern efforts to improve sewage treatment and waste disposal, insects remain a link between disease-contaminated wastes and food and food-handling facilities.
Bites and stings
Everyone reacts differently to an insect bite or a sting. The lucky few will develop no reaction, while for some the bite may lead to a small red itchy lump and in others an irritating rash may occur. For the more unfortunate who especially sensitive, a life-threatening condition known as anaphylaxis may be the result. This condition can develop over time through repeated bites and stings from arthropods such as ticks, bees, and wasps. As everyone reacts differently, it is usually not possible to determine which pest was responsible for any particular bite. Also, there are many other possible causes of bite-like reactions, including fibers, plants, bacterial and fungal infections, adverse reactions to medication, just to name a few. It is always prudent to conduct bug management procedures such as professional termite control in the house if infestation has been sited.
Bug management is imperative in any situation. Pests have a way of going undetected and unnoticed by humans who cohabit with them. This is one of the main reasons why, sometimes the main culprit for an illness may get overlooked.