| outbreak of erythema nodosum of unknown cause - new mexico, november 2007-january 2008. | erythema nodosum (en) is a form of panniculitis, which has been associated with several infectious and noninfectious etiologies. en clusters have been associated with outbreaks of coccidioides immitis, histoplasma capsulatum, and yersinia pseudotuberculosis infections. in december 2007, a physician in a rural new mexico community of approximately 10,000 persons reported to the new mexico department of health (nmdoh) that 13 patients had been diagnosed with en since mid-november. no en outbreak h ... | 2009 | 20010510 |