Infectious Disease

Can a tick bite cause allegy to red meat? How long must a tick feed before it can transmit disease? Test your knowledge about tick borne illnesses with this mini-quiz.

An asymptomatic bump; IBD and celiac disease; a gradually expanding spot .... test your clinical skills on a range of disorders in this week's quiz.

Eosinophilic ascites is an extremely rare presenting sign of hypereosinophilic syndrome.

Not only does the welcome long-term survival of HIV-infected patients put them at risk of ordinary age-related bone loss, antiretroviral therapy leads to a decline in bone mineral density. What can be done?

HIV-infected men had a 2-fold increased risk of non–virus-related, non–AIDS-defining cancers compared with the general population living in the same area.

The eyes may be "windows to the soul," but they also provide a look at your patients’ overall health and clues to specific disorders. This week’s photo essay will test your ability to identify eye-related problems.

Double anaerobic antimicrobioal therapy is unnecessary and exposes patients unnecessarily to unpleasant adverse events.

Fecal microbiota transplant is thought to help restore the diversity of microbiota in the gut and allow restoration of colonization resistance.

This agent has a large number of drug-drug and drug-food interactions, and there is a need for increased INR monitoring.

Creatures of all kinds can get under your patients’ skin and cause problems, and the results sometimes are mistaken for other types of lesions. This week’s photo essay will test your ability to identify various kinds of diagnoses.

Identification of infections often presents a major challenge because there may be significant overlap in clinical findings. This week's photo essay takes the form of a quiz to test your ability to meet the challenge and hone your diagnostic skills.

A rapidly developing lesion . . . flashing lights . . . blue sclera: can you answer this week’s 5 quiz questions?

Vaccination against influenza substantially reduces the disease’s burden in the United States each year, according to the results of a unique look at the impact of vaccinations.

A biopsy revealed non-caseating granulomata, and culture revealed Mycobacterium marinum. This patient had a fish tank at home, and used his right hand to perform maintenance.

Pulmonary embolism was the diagnosis in these 3 women, each of whom presented with positional right flank pain.

A scabies diagnosis can be made with a history of pruritus that is worse in the evening with a rash in a typical distribution and a history of itching in close contacts.

A pruritic rash of 1 week's duration on the boy's elbows, knees, back, and legs did not respond to oral prednisone.

Antiretroviral therapy may not halt neurocognitive decline even in patients who have normal CD4 counts and undetectable viral loads.

Cutaneous larva migrans (CLM), also known as “creeping eruption,” is the most commonly acquired tropical dermatosis

Because of this patient’s recent travel history to Africa, the penile lesions were cultured, and Haemophilus ducreyi was isolated, confirming the clinical suspicion of chancroid.

This week’s questions challenge your dermatologic and radiologic skills, and then some. See how you fare…

The diagnosis of juvenile dermatomyositis can be challenging when proximal muscle weakness develops without characteristic skin manifestations. In this patient, rash appeared 2 months after the onset of muscle weakness. As a result, the initial diagnosis was viral myositis, which led to delayed therapy.

Screening is advised for persons at high risk for infection along with one-time screening for all adults born between 1945 and 1965.

Approval of a blood test that identifies the genotype of hepatitis C virus that has infected a patient can be expected to improve the effectiveness of treatment for chronic hepatitis C with new antivirals.

This non-specific pruritic eruption is a common manifestation associated with HIV infection, especially in the pediatric population.

Images of acute allergic contact dermatitis, Lyme disease, southern tick–associated rash illness, tick-borne babesiosis, Rocky Mountain spotted fever, and brown recluse spider bites.

A 31-year-old man was treated for otitis media after presenting to the ED with severe ear fullness, pain, and diminished hearing on one side. Despite antibiotic treatment, the symptoms worsened after 72 hours. his symptoms worsened. Tender, vesicular erythematous lesions developed in his mouth and exclusively on the left side of his face, including his forehead, maxilla, and mandible

Women tend to be excluded from pharmaceutical company-sponsored trials of antiretroviral medications.

Which organism is the likely cause of this lesion? Can you pick up dx clues in this sonogram? Test your clinical skills here with this week’s 5-question quiz...

This nodule on the neck is a typical location and appearance for an epidermal cyst. If the cyst has never been inflamed or infected, it may be removable through a very small punch biopsy followed by lateral pressure or a small linear incision.