Sales: Sales: Support: Support:
Academic writing services  
Custom written essay Book report Research paper Dissertation Resume and CV Editing and proofreading  
main menu
By ordering custom paper you get
  • 24/7 Support
  • Over 100 professional US Writers
  • 300 words per page
  • Flexible discount system
  • FREE revision (within 2 days)
  • Anti-Plagiarism Software Check
we accept
sample essays
Accounting Essays
Admission Essays
Analysis Essays
Art Essays
Biography Essays
Biology Essays
Book Review Essays
Business Essays
Case Studies Essays
Cause and Effect Essays
Character Analysis Essays
Communication Essays
Communication and Media Essays
Compute Technologies Essays
Consideration Essays
Controversial Essays
Description Essays
Economics Essays
Education Essays
Evaluation Essays
Explanation Essays
History Essays
Job Essays
Law Essays
Management Essays
Medicine Essays
Music Essays
Personal Essays
Personal Experience Essays
Persuasive Essays
Persuasive Speech Essays
Philosophy Essays
Political science Essays
Politics Essays
Proposal Essays
Psychology Essays
Reflective Essays
Religion Essays
Research Essays
Response Essays
School Essays
Science Essays
Sociology Essays
Technology Essays
World Literature Essays
Use of DDT in Malaria Vector Control essay
← Spiritual AssessmentRespiratory Protection Standard →

Use of DDT in Malaria Vector Control. Custom Use of DDT in Malaria Vector Control Essay Writing Service || Use of DDT in Malaria Vector Control Essay samples, help

Types of Toxicology Data Used in Making the Decision

The type of toxicology data used in making such a decision is subject to the cumulative estimated dietary intake (CEDI) values. DDT does not have very high CEDI levels. For substances with such low CEDI values (between 0.5 and 50 ppb), two types of genotoxicity studies have been recommended. These tests are the mouse lymphoma assay (or vitro cytogenetic damage) and the bacterial mutagenicity assay.

Substances entering the body at such low levels usually present little challenge in and of themselves (Van Den Berg, 2009). According to some studies, such substances cause little concern for the safety of the host’s system. There are, however, reasons to believe that substances entering the system of a person, little as they are, could present considerable risks for cancer development. Therefore, they are of importance. DDT falls under this category because the amounts that enter the human system upon skin exposure are not enough to warrant any significant health measures, but they could present a potential carcinogenic risk.

Disposition of toxic compound

Disposition of toxic compounds is usually a four step process involving absorption, distribution, metabolism and excretion. With a proper understanding of these four processes within the disposition process, it is possible to make a fairly objective and accurate projection as to whether or not a compound is safe for human consumption.

DDT is no exception to the four-step disposition process of all toxic compounds. The absorption of DDT requires that it passes through the membranes of the body. Absorption usually occurs through body membranes such as the integument and membranes lining both the respiratory and digestive tracts. DDT particles are so large that when inhaled, they get deposited in the upper respiratory tract and are eventually swallowed (Besbelli, 1990). DDT is absorbed very slowly form the digestive tract, but its dissolution in animal or vegetable fats makes it more easily absorbed. Its dermal absorption is limited. Hence, from an absorptive point of view, DDT seems not to be easily absorbed.

DDT is quickly distributed throughout the body via the bloodstream after absorption, and it can thus present major toxicity within a short period of time. It has been identified in all body tissues after its administration, suggesting that it can be stored in all body tissues. The chemical has been shown to have a preference for storage in adipose tissue due to its fat-solubility.

The half-life of DDT is long and could be months long. Adipose-stored DDT has been shown to be lost slowly form the system after a cessation of ingestion, and about 25.5 months after cessation of ingestion, the amounts found in the adipose could still be about 35% of the total amount ingested (Besbelli, 1990). DDT is usually converted to the less toxic form, DDE, but the storage time for this compound within body tissues is infinite. However, the major pathway for detoxification of DDT is through its conversion to DDD, and finally to a water soluble compound, DDA, which is much more easily excreted from the system.

DDT is slowly excreted from the system with about only 1% of stored DDT getting excreted from the system daily. It is mainly excreted in the form of DDA. It is excreted through the urine and also through milk. It can also be transferred through the placenta.

DDT can be lethal in doses of about 30 g for an adult human being. Fats and oils increase its toxicity because they aid in its absorption. The relatively long half-life of DDT in human beings could increase its potential danger because it could have a carcinogenic effect.

Exposure and Responses

DDT can gain access to the body through a number of means. It could accidentally or deliberately get ingested through the mouth, or through contaminated foodstuffs. The chemical could get inhaled through occupational exposure or otherwise. DDT is poorly absorbed through the integument, although oily skin could enhance its absorption. The chemical might also be transferred through breastfeeding of milk from mother to infant or through the placenta from mother to fetus.

Poisoning by DDT often displays clinical symptoms over a wide range of time, depending on how much exposure has been achieved by the patient. The patient may vomit immediately due to local gastric reflexes. The symptoms may start showing after as many as six hours. Common signs of DDT poisoning include: vomiting, dizziness, loss of equilibrium, ataxia and convulsions.

Should WHO Continue to Approve of DDT?

DDT is indeed an effective control against malaria. However, the positive effect of DDT in the fight against malaria could be counterbalanced or even surpassed by its negative effects on the human population. For instance, the increase in infant survival due to malaria control could be offset by the infant mortality resulting from decreased lactation or preterm birth, both of which have been attributed to DDT(Van Den Berg, 2009). Therefore, the WHO ought to consider reviewing its policy regarding DDT.

Use of DDT in Malaria Vector Control. Custom Use of DDT in Malaria Vector Control Essay Writing Service || Use of DDT in Malaria Vector Control Essay samples, help

Order Now
Order nowhesitating

Related essays

  1. Respiratory Protection Standard
  2. Safe Entry and Clean Up at New Orleans
  3. Spiritual Assessment
  4. The Sport Injuries

order now

Order now
why choose us
96% of satisfied returning customers
24/7 customer support
A wide range of services
Up-to-date sources
100% privacy guaranteed
MA/PhD writers
Custom written papers only
Free plagiarism report (on demand)
Free revision (within 2 days)
Free cover and bibliography page
Direct communication with a writer
Are your writers qualified for the custom writing?
How quick can my order be accomplished?
Is it legal to buy custom essays, term papers or book reports from your company?
Are essays offered by your company truly custom-written?
Is it safe to buy from
How secure is the payment system of your company?
Can I submit custom essays or term papers done by your company as my own?
How can I contact your company if I've got problems with my ordered paper?

Finally, I've found the real custom writing service . My grades are saying "Thank you, it's been a pleasure to work with you."

Jamal, South Africa

I can't believe you finished my essay under such a short deadline! You saved me from a disaster once again. You guys deliver exactly what you promise. I'll be back. That's for sure!

William H , Kansas, US

contact us
Toll free for US & Canada only. International callers are charged for outgoing calls.

Our phone numbers: provides custom term paper writing/rewriting services inclusive of research material for assistance purposes only. The term papers should be used with proper reference and are not meant to replace actual assignments.

Get 15% off your first custom essay order

Order now

from $12.99/PAGE