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Hyper-reactive malarial splenomegaly (HMS), or tropical splenomegaly syndrome, is a severe complication of chronic and recurrent infections caused by Plasmodium spp . This condition typically results in splenomegaly greater than or equal to 10 cm and a constellation of laboratory findings, including the absence of identifiable parasites in peripheral blood smears. However, patients with HMS demonstrate serological or molecular evidence of infection. Despite being a familiar entity in malaria holoendemic countries in Africa, and regions of Papua New Guinea, the pathophysiology, natural history, and treatment of the syndrome remains to be fully elucidated. Herein, we describe a highly suggestive case of HMS in a Senegalese patient migrating northbound to reach the U.S.-Mexico border and for whom we provided medical care during his crossing of the Darien Gap in Panama. We also reviewed the literature on diagnosing and treating HMS in-depth., Competing Interests: Laura Naranjo is a GSK employee. All the information in this paper is her opinion and does not reflect the position of GSK., (© 2023 The Authors.)

Human migration has shaped the distribution and patterns of infectious diseases transmission throughout history. Migration is one of the contributing factors that has played an important role in the dissemination of drug-resistant Plasmodium falciparum . Central America and Mexico are important transit points of an increasing migrant flow originating from countries where chloroquine-resistant P . falciparum and vivax are prevalent. Surveillance systems, as well as detection and diagnostic capacities in the Central American region, are limited. The additional challenges imposed by the increasingly mobile population in the region are creating the perfect scenario for the emergence or re-emergence of infectious diseases, such as the introduction of chloroquine-resistant malaria. The development and implementation of transborder, collaborative, and ethical migrant health initiatives in the region are urgently needed. The health of migrant people in transit during their migratory route is of our collective interest and responsibility; their exclusion from health programs based on their legal status contradicts international human rights treaties and is inconsistent with ethical global public health practice., Competing Interests: LN is a GSK employee. All the information in this paper is of her own responsibility and doesn't reflect the position of GSK. All other authors declare no competing interests., (© 2023 The Author(s).)

Cutibacterium acnes, previously known as Proprionobacterium, is a commensal Grampositive bacterium of the skin commonly implicated in prosthetic joint infections. However, it has been documented to play a role in other conditions, including SAPHO syndrome (synovitis, acne, pustulosis, hyperostosis, osteitis), a rare autoinflammatory disorder. Diagnosing SAPHO syndrome is cumbersome, as the clinical manifestations are variable and overlap with many inflammatory joint disorders. Herein, we describe a 56-year-old female patient with a presumed diagnosis of longstanding seronegative rheumatoid arthritis and history of C. acnes prosthetic joint infection following revision arthroplasty of the right shoulder. She presented to our clinic with a rash over the upper extremities and trunk and joint symptoms involving the right shoulder. Treatment was initiated with ceftriaxone followed by doxycycline suppressive therapy, with clinical improvement of joint and skin involvement. Symptoms recurred upon brief cessation of antibiotic therapy due to adverse gastrointestinal effects; however, symptoms abated once again upon re-initiation of treatment. Given the patient's cutaneous lesions and longstanding history of arthritis that improved with antimicrobial therapy against C. acnes, the diagnosis of SAPHO syndrome was entertained. The present case demonstrates the clinical challenges of diagnosing SAPHO syndrome and the importance of its consideration on the differential for a patient with osteoarticular and cutaneous features. Additional literature is needed to improve diagnostic criteria and treatment guidelines., Competing Interests: All authors none to declare., (© 2023 The Authors.)

Competing Interests: All authors declare no competing of interest. GC-M has received an independent grant from Pfizer through the Asociación Colombiana de Infectologia ACIN- capitulo central; speaker fees from Pfizer, Sanofi Pasteur and Biomerieux; and participated in Advisory Boards for MSD and Sanofi Pasteur.

We present a rare case of a 71-year-old female. She has a history of irritable bowel syndrome that is diet controlled. However she presented to the emergency department (ED) with a history of diarrhea, weakness, chills and right lower back pain for two days. She was found to have epidural abscesses secondary to Capnocytophaga bacteremia. To date, there has been only one case report of a sacral abscess secondary to Capnocytophaga sp. Capnocytophaga is a genus of facultative anaerobic gram-negative bacilli that are frequent commensals in the oral cavity of cats and dogs. It can be transmitted by bites, scratches or contact of saliva with exposed mucosa or skin. It is a rare but potentially fatal infection, that is known to cause severe septicemia and shock, especially in patients with splenectomy. Our case is a unique presentation of sepsis and epidural abscesses in an immunocompetent host due to Capnocytophaga . Given the slow growing and fastidious nature of the organism, it requires a high suspicion in a patient presenting with slow growing gram-negative rod bacteremia and diligent following of cultures and sensitivities to ensure correct antibiotic coverage., Competing Interests: No conflicts of interest.