Doctor insights on:
Is It Dangerous To Eat Moldy Bread If You Have A Penicillin Allergy
No: Most mold on bread is rhizopus, not penicillium, and would not cause a reaction in those with allergy to the drug penicillin. There have been a few penicillium molds producing penicillin found in some sausages and cheeses, but generally, there probably is not enough penicillin to cause a reaction, since this is almost never seen. The usda recommends that moldy breads be discarded for everyone. ...Read more
Penicillin allergy can be classified as an ige mediated immediate immune reaction in which a patient develops an allergic reaction to the break-down products of penicillin leading to allergy cell activation and mast cell release within 30 minutes to a few hours or it can be a delayed t cell mediated immune reaction in which patients develop a skin rash days after being ...Read more
I accidentaly ate a slice of bread until I noticed it has mold on it. Should I be concerned? I have a penicillin allergy.
Mold : If nothing has happened by now then everything is good ...Read more
Not the same: The color of bleu cheese is not produced by penicillium, although imagine that if it sat around long enuf and became contaminated this could grow on it. ...Read more
I have a penicillin allergy (rash, angioedema) but am I able to eat blue cheese? Am I at risk for Steven Johnson Syndrome?
If a person has penicillin allergy, is it safe to eat roquefort, blue, or gorgonzola cheese? Does the mold in the cheese make penicillin?
Great question: Reactions to penicillin in foods eaten by persons allergic to penicillin are rare - perhaps 10 cases in past 25 years worldwide. Cases involve eating meat from an animal given penicillin before slaughtering. I found no cases attributed to the cheeses listed. They use a different species of the genus penicillium to add flavor. Also many persons who think they are penicillin allergic are not. ...Read more
Depends on your pcn allergy
2-3 % cross allergy
be careful if you have a bad reaction to pcn. ...Read more
Lots of Options: Depends on the infection. Certain infections call for different antibiotics. Penicillin drugs are usually first line for most problems, however there are alternatives that can be used. Your doctor would be the best person to talk about what options are right for you. If you are interested in determining if you still have a penicillin allergy, see an Allergist for penicillin skin testing. ...Read more
Yes: Despite increasing antibiotic resistance, there usually is another antibiotic that can be found. If this is not the case, and there is a serious need for penicillin, many penicillin allergies can be desensitized. This procedure takes place in the hospital and only lasts for the duration of time that you are taking penicillin, but is effective. So in emergencies, there are still options. ...Read more
Zithromax: Azithromycin (zithromax) is a good option for streptococcal tonsillitis. There is some cross-reactivity between penicillins and cephalosporins (such as keflex), and these would not be my first choice. Many infections are caused by viruses, and in this situation antibiotics are not effective. ...Read more
Skin testing: 90% of pt labelled as PCN allergic are not PCN allergic. PCN skin testing and possible oral challenges can be done to clarify this reported sensitivity. ...Read more
Skin test: The formal means is to have skin testing done by a doctor. The agent is prepared to a standard small dose and injected under the skin. Reaction or not is assessed in a standard time interval. ...Read more
Depends: That depends on what's infected. The choice of antibiotics is dependent on the type of infection. ...Read more
Yes: No cross reactions between these two.Get a more detailed answer ›
I am being prescribed doxycyline for a week for sinus infection. I leave to Hawaii in 7 days and WILL be in the sun. Because I have a penicillin allergy my antibiotics options are limited. Should I be worried about sun exposure? I will not be able to
Sun sensitivity : Unfortunately your statement was cut off. If you will be unable to avoid the sun then perhaps you should find an alternative to the doxycycline which has a significant incidence of sun sensitivity. Otherwise I would recommend that you cover up and use broad-spectrum sunblock. You should check with the physician who wrote the prescription. A viral URI may not require antibiotics. ...Read more
Skin and other tests: It depends on which antibiotic is of concern. There are skin tests available for many of them, but they should be performed by a properly trained allergist with the necessary controls. After skin testing, depending on the history, another step (cautious challenge or desensitization) may be necessary. ...Read more
< 7 - 10 days: Antibiotics like penicillin can cause different types of rashes that can vary in how long they persist. The classical true penicillin allergic rash is hives and once the penicillin is stopped usually resolves in less than 7-10 days. Occasionally this can trigger more prolonged hives. Other rashes from penicillin not due to true allergy would include small red bumps that usually lasts < 1-2 wks. ...Read more
Measles-like: Most rashes with penicillin are "morbilliform" or measles-like. More serious penicillin allergy may result in hives (itchy, patchy swellings in the skin) or angioedema (swelling of the lips, eyelids, hands or feet). There are other kinds of rashes that can occur, some of which are serious, and some of which are not. Your personal doctor or an allergist can help you decide. ...Read more
I just reviewed: enlisted / commission physical standards and did not note medication allergies as a disqualifying condition. Good luck. ...Read more
No, they're fine: There is no cross reaction between these two classes of antibiotics. ...Read more
Molds consist of airborn spores and spreading forms (hyphae) growing on surfaces. Several species are black including stachybotrys and aspergillus. Black mold ingestion has been associated with a toxic syndrome with brain and blood disorders. Most patients do not ingest black mold so the correlation with their ...Read more
Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more
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