Several human diseases caused by protozoa are transmitted by a variety of arthropod vectors (Table). The vectors are not simply 'flying syringes', but represent a second host for the protozoan parasite.arasites which reside within the blood or internal organs of the host have logistical problems in terms of infecting a new host. In contrast to fecal-oral transmission, where infective stages are excreted into the environment, potential new hosts would not normally come into contact with the parasite.
If you have accumulated enough work credits (typically 40) the earliest you can collect Social Security retirement benefits is 62. At that age, your monthly payment would be about 75% of the amount you would receive by waiting to retire at SSA's full retirement age. Full retirement age:
Generally, you may begin taking Social Security at age 62 as of publication, though you will not be eligible for full benefits until you reach the age of 67. If you take Social Security early, you get a lower monthly payout. The payout level has nothing to do with your current income or how much you own.enior citizens can own any amount of assets and still collect Social Security, but not SSDI. a couple of seniors image by Tomasz Parys from Fotolia.com. Many business owners are concerned about Social Security and whether they will be able to collect promised benefits if they have other means of support.