Alexei Gonzalez-Estrada

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The most prevalent cancer diagnosed in the world is sunlight-induced skin cancer. In addition to being a complete carcinogen, UV radiation, the causative agent of skin cancer, induces immune suppression. Because UV-induced immune suppression is a well-recognized risk factor for skin cancer induction, it is crucial to understand the mechanisms underlying(More)
BACKGROUND Up to 60% of the US visitors to Mexico develop travelers' diarrhea (TD). In Mexico, rates of diarrhea have been associated with the rainy season and increase in ambient temperature. However, the seasonality of the various diarrheagenic Escherichia coli pathotypes in travelers has not been well described. OBJECTIVE A study was undertaken to(More)
BACKGROUND Rifaximin has been shown to be effective in treating and preventing travelers' diarrhea (TD) during the summer season. METHODS The goal of this double-blinded multicenter trial was to assess the efficacy and safety of rifaximin 550 mg administered once daily for 14 days compared with placebo in the prevention of TD during the dry season in(More)
Penicillin allergy is the most commonly reported drug allergy in the United States. However, after undergoing a complete evaluation by a board-certified allergist, including skin testing, 90% of patients labeled as 'penicillin-allergic' are able to tolerate penicillin. Clinical presentation is key in classifying reactions as either mediated by or not(More)
BACKGROUND Asthma affects >300 million people globally, including 25 million in the United States. Patients with asthma frequently use the Internet as a source of information. YouTube is one of the three most popular Web sites. OBJECTIVE To determine the educational quality of YouTube videos for asthma. METHODS We performed a YouTube search by using the(More)
BACKGROUND The diagnosis of perioperative anaphylaxis (PA) remains challenging, given its clinical setting, exposure to multiple medications, and rarity. Previous reports have found that PA is most frequently caused by neuromuscular-blocking agents. OBJECTIVE To determine characteristics and causes of PA at our center. METHODS We performed a(More)
A 40-year-old man with a previous AIDS-defining opportunistic infection and five negative HIV tests presented to our outpatient clinic. The laboratory test was relevant for less than 300 total lymphocytes on two separate occasions. He was diagnosed with idiopathic CD4 lymphocytopenia and was started on antibiotic prophylaxis for Pneumocystis carinii(More)
An 81-year-old Caucasian male presented with acute coronary syndrome, requiring high-dose radio contrast media (RCM) life-saving catheterization. He had a history of diffuse maculo-papular rash 24 hr after an RCM procedure. The patient had a total of four RCM procedures at outside facility with the use of ionic, hyper osmolar, iodinated RCM and non-ionic,(More)