Six characteristics of sexual transmitted diseases

Cypridopathy (mainly refers to classical cypridopathy, not including some sexual transmitted diseases in broader sense) have six characteristics that we can't perfectly explain now:

No1: human hardly have any congenital immunity for Cypridopathy. Dermal mucous membrane is a natural barrier to protect us from diseases, even we expose to numerous pathogens every day, rarely have we been infected even the skin is broken. Most Cypridopathy infect us through mucous membrane on reproductive organs, and membrane there hardly have any resistance to pathogens of Cypridopathy, therefore, leading to inevitable onset.

No.2: no effective vaccine. Meningococcus and diplococcus gonorrhoeae are of the same genus-neisseria, with many similar characters, however, the vaccine for Meningococcus has early come out, neisserbacterin still can't be put into practice in spite of continues efforts. The application of dryvax has made variola world widely extinct, and measles vaccine, vaccine for heine-medin disease, vaccine for typhoid, and vaccine for cholera have also made important contribution in preventing infectious diseases, however so far, an effective vaccine for Cypridopathy hasn't been discovered.

No.3: no acquired immunity can be gained after recovery. One can get acquired immunity in many infectious diseases which mean the patients will not have onset of this disease throughout their life even expose to the pathogens again. But it is not the case in Cypridopathy.

No.4: Cypridopathy can not be transmitted by insects, including blood transmitted Cypridopathy and mucous membrane transmitted Cypridopath. There are many diseases transmitted by insects, such as malarial disease, encephalitis b janpanese encephalitis, in which mosquito carry the pathogens by biting patients and heath people. However, the mechanism of why blood transmitted Cypridopath can't be transmitted by insects has not been clarified.

No.5: low resistance of the pathogens of Cypridopath to outside environment. tubercule bacillus is able to keep alive and maintain its infectious ability in dry condition for 3 months, thus, it can be transmitted through daily necessities; staphylococci can keep alive for 2 or 3 months after the dryness of purulence; salmonella can also maintain its infectious ability in feces for 1 or 2 months. However, the pathogens of Cypridopath immediately die after leaving human body, which greatly reduce the risk of indirect infection. For example, treponema pallidum automatically die in dry condition only 1 hour away from human body; diplococcus gonorrhoeae has autolysis system which means automatic dissolution of the bacterium after leaving human body, even the autolysis doesn't occur, it also lose its infectious ability in a short time; the frightening HIV virus also lose its infectious ability out of the human body.

No.6: cypridopathy endanger spouse and child. If one of the couple suffered from cypridopathy, the pathogens will jump from one to another endlessly unless both of them are cured. Infants and child live together with their parents, and the daily necessities they use can not be segregated to one another, therefore, Infants and child also have chances to be infected. Some cypridopathies can be transmitted through placenta, such as syphilis and AIDS. The infants who are infected with treponema pallidum may appear facial congenital syphilis related symptoms, which seems to tell people that “may parents are suffered from syphilis”.

The “six characteristics” warn us that we must be determined in preventing sexual transmitted diseases. Moreover, some people believe that they can avoid sexual transmitted disease by using condom, but it has been proven not to be perfectly safe, therefore, the most effective measure in preventing sexual transmitted diseases is sexually exclusive.