Great question. There are many things that are misdiagnosed as spider bites. It could be a bad reaction to a bite from another arthropod (ones that are far more likely to bite than spiders, because they actually feed on blood, which spiders do not) such as a tick, flea, or mite. In many cases, necrotic lesions are diagnosed as brown recluse bites even when there is no reason to think that a bite ever happened – it could be a tiny scratch that got infected, for example. Here is a list from Rick Vetter of some of the many things that have been misdiagnosed as brown recluse bites: http:/// (scroll down to the table at the bottom of the page). It is important to note that some of these – Lyme disease for example – can become very serious if not treated correctly. If a person has Lyme and is treated for a recluse bite (treatment is RICE), they will not get appropriate care (Lyme can be effectively treated with antibiotics, but gets much worse if these are not administered right away) and the outcome will be far worse. This is why misdiagnosis of spider bites is so harmful. Another post on the topic here: http:///2014/09/25/the-truth-about-spider-bites-aggressive-spiders-and-the-threat-to-public-health/
Marsupials have two uteri, each of which connect to a lateral vagina and which both use a third, middle "vagina" which functions as the birth canal.  Marsupial embryos form a choriovitelline placenta (which can be thought of as something between a monotreme egg and a "true" placenta), in which the egg's yolk sac supplies a large part of the embryo's nutrition but also attaches to the uterine wall and takes nutrients from the mother's bloodstream. However, bandicoots also have a rudimentary chorioallantoic placenta, similar to those of placental mammals.
A few weeks agao I’ve had a really stubborn sinusitis and after a few weeks my doctor told me I had to take antibiotics to get rid of it. The last time I’ve taken antibiotics was years ago. I haven’t had any side effects but after 3-4 days I’ve noticed that my skin cleared up. To be honest it didn’t occur to me that it may be the antibiotics. After the last pill (10 days) my skin looked better than it did in years. Seriously, so amazing. Then I’ve read that this medicine indicated for acne. After 1 1/2 weeks my skin got back to normal, though. So disappointing, but I’ve had already expected it.