Tokyo 2011, Tsukiji shopper in face mask
After a very long MCAT induced hiatus- just about the length of the larval loa loa stage in human hosts, I have returned with something that is bound to excite/disgust/nauseate/appall most of you. However, to fully understand my inspiration for this piece, one must first understand my pre-pubescent life.
As a young tyke believed to have ADHD, it was rather difficult to get me into bed... the running, the dancing, the singing, the scuba diving in the bathtub. That was until my dad figured out my favorite bed-time story. Every night when my lights went out, I would lay rapt with attention as he would have to rack his brains to find some repulsive diseases he could describe to his warped 6-year old child, while calculating how much the ensuing therapy would likely cost. True to form, upon seeing this news story on CNN, my father told me I would probably find it rather, ehm, intriguing (see fowleri description below).
p.s. if you are new to my blog, read this, this, OR this. So you don't start off thinking I'm a superfreak.
TOP 3 EXCITING PARASITIC INFECTIONS - in the simplest, least biochemical fashion
- EBOLA
This is the quintessential terrifying parasitic infection and also the topic of one of my favorite documentaries. At only 288 amino acids, contact with this minuscule filovirus is usually a death sentence...for an entire African village.
After infection, this virus takes over protein synthesis in the body and creates a trimeric glycoprotein complex that attaches to endothelial cells lining your blood vessels causing a faulty immune response that helps to carry the virus around your body. This immune response reduces your vascular integrity and inhibits coagulation of blood i.e. you start bleeding from all your mucus membranes in/out of your body and have no way to stop it.
What's scary? The virus has MANY natural reservoirs: monkeys, reptiles, birds... etc. and it is spread by any body fluid contact, even saliva. Most outbreaks are believed to be from humans handling dead animals that were infected. Epidemics, however, are localized to hospital with poor sterilization processes or remote villages.
What's scarier? There is no way to treat it, but 2010 findings from Boston University on small interfering RNA SEEM promising.
- NAEGLERIA FOWLERI
Ah yes the topic of that fateful CNN article... the Naegleria fowleri amoeba, which is 98% fatal! Infection occurs when children swim in stagnant water especially during droughts and hot spells (like this summer in the Southern US).
The amoeba swims up your nose, follows your nerve fibers to your brain, and literally EATS YOUR NEURONS with its tiny sucking apparatus. holy shit.
What's scary? Initial symptoms include vague things like... headaches, nausea, fever, changes in taste and smell. Basically things that would happen with a minor flu. Later on you get the intense neurological symptoms of ataxia, hallucinations, seizures etc. but by that time, it's definitely too late.
Actually, this isn't technically considered a parasite because the amoeba "accidentally" swims up your nose.
- LOA LOA FILARIASIS
Finally we have a macroparasite joining our ranks of scary infections. The most common vector of this parasite are the mango/mangrove/deerfly of Africa. Without going into the specific lifecycle, the microfilariae are transferred between fly blood meals. The eye worm matures while chilling in the subcutaneous tissue of its human host.
Symptoms usually include calabar swellings i.e. swollen bulbs on extremities where the worm is reproducing- not too scary. However, in certain cases the worm migrates to the subconjunctival tissue where it can easily be seen. Please observe.
Luckily cutting the parasite out of the eye has proven very effective. Scalpels at the ready!
- Unfortunately NECROTIZING FASCIITIS is not considered parasitic. Otherwise, this "flesh eating" bacterial infection would definitely make the list.
And on that note... goodnight, sleep tight, don't let those parasites bite.
