Spider bites can cause one or several rashes or lesions with fluid-filled blisters called bullae . However, other insect bites can too. And although MRSA looks very similar, it typically causes multiple rashes with small, pus-filled bumps called pustules.
By Daniel More, MD
Daniel More, MD, is a board-certified allergist and clinical immunologist. He is an assistant clinical professor at the University of California, San Francisco School of Medicine and formerly practiced at Central Coast Allergy and Asthma in Salinas, California.
This article explains the key differences between MRSA and spider bites, as well as other common bug bites. It also describes treatments and complications of MRSA and when it is time to see a healthcare provider.
This spider’s telltale sign is the red hourglass shape on the bottom of its big, round abdomen — the back part of the body. Black widows are shiny and black and about half an inch long. You can find them anywhere in North America, but mostly they’re in the southern and western areas in the U.S. They like quiet, out-of-the-way places like closets, sheds, garages, and woodpiles.
May be interested:
What’s a Black Widow Bite Like?
American Family Physician: “Common Spider Bites.”
But, in severe cases, potentially life-threatening complications can rapidly develop, including:
14) Dr P. Marazzi / Science Source
Is It a Spider Bite or MRSA Staph Infection
Penn State College of Agricultural Sciences: “False Black Widow Spider.”
They’re pretty much just like an insect bite. For the most part, you can’t tell a spider bit you just from your symptoms. You’ll get a little bump on your skin. It might get red, itchy, and swell up a bit. It might hurt, but no more than a bee sting and usually not for more than an hour or so. That’s basically it — unless you’re bitten by a venomous spider.
If you are prescribed oral antibiotics, you need to take the drugs as prescribed and to completion even if you’re feeling better. If you don’t, the infection may return. Worse yet, a more resistant strain may emerge and be harder to treat.
Spider Bites: What You Need to Know
2) ISM / CID / Medical Images
After hatching, baby chiggers wait on plants for people or animals to pass by. When they do, the chigger attaches to them using tiny claws. Once attached, it pierces their skin and injects its saliva (spit). The spit contains digestive juices that dissolve skin cells. The chigger then eats the dissolved cells, which provide the protein it needs to grow into an adult. After a couple of days the chigger falls off, leaving a red bump on the skin.
Chiggers are found all over the outdoors, including in grassy fields, along lakes and streams, and in forests. It’s the baby chiggers that bite people and animals.