Acute colonic pseudo-obstruction syndrome in patients with severe COVID-19 in Buenos Aires, Argentina.

Background: Several gastrointestinal complications have been reported in patients with COVID-19, including motility disorders, such as acute colonic pseudo-obstruction (ACPO). This affection is characterized by colonic distention in the absence of mechanical obstruction. ACPO in the context of severe COVID-19 may be related to neurotropism and direct damage of SARS-CoV-2 in enterocytes.

Cutaneous myiasis due to Cochliomyia hominivorax in a drug user.

Myiasis is the condition resulting from the invasion of tissues or organs of man or animals by dipterous larvae. The blowflies (Calliphoridae) of Argentina comprise several species that may cause myiasis by colonizing wounds or infected body orifices, and one specific parasite: Cochliomyia hominivorax. This species often causes traumatic myiasis in cattle, dogs and cats, and it is not rare in humans.

False positive reactions in confirmatory tests for syphilis in presence of antiphospholipid antibodies: misdiagnosis with prognostic and social consequences.

False-positive reactions in the Venereal Disease Research Laboratory test are well known, whereas a positive fluorescent treponemal antibody absorption assay is rarely thought to be a false positive. The non-recognition of serological false-positive tests for syphilis may have negative prognostic and social implications.