Luis A. Marcos

Dr. Luis A. Marcos


Research Focus & Metrics

Academic Career Length

24Years (2003-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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11 April 2017 in Annals of Clinical Microbiology and Antimicrobials
Verified
Journal Article
Open access
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EKEkaterina A. Kletsova
Ekaterina A. Kletsova
ESEric Spitzer
Eric Spitzer
BFBettina Fries
Bettina Fries
Luis A. MarcosLuis A. Marcos
Luis A. Marcos
Babesiosis is a potentially life-threatening, tick-borne infection endemic in New York. The purpose of this study was to review recent trends in babesiosis management and outcomes focusing on patients, who were treated with combination of azithromycin and atovaquone. A retrospective chart review of patients seen at Stony Brook University Hospital between 2008 and 2014 with peripheral blood smears positive for Babesia was performed. Clinical and epidemiological information was recorded and analyzed. 62 patients had confirmed babesiosis (presence of parasitemia). Forty six patients (74%) were treated exclusively with combination of azithromycin and atovaquone; 40 (87%) of these patients were hospitalized, 11 (28%) were admitted to Intensive Care Unit (ICU), 1 (2%) died. Majority of patients presented febrile with median temperature 38.5 °C. Median peak parasitemia among all patients was 1.3%, and median parasitemia among patients admitted to ICU was 5.0%. Six patients (15%) required exchange transfusion. Majority of patients (98%) improved and were discharged from hospital or clinic. Symptomatic babesiosis is still rare even in endemic regions. Recommended treatment regimen is well tolerated and effective. Compared to historical controls we observed a lower overall mortality.

1 October 2017 in Emerging Infectious Diseases
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Journal Article
Open access
Luis A. MarcosLuis A. Marcos
Luis A. Marcos
ESEric Spitzer
Eric Spitzer
RMRahul Mahapatra
Rahul Mahapatra
YMYupo Ma
Yupo Ma
THTanya A. Halse
Tanya A. Halse
VEVincent E. Escuyer
Vincent E. Escuyer
We report a case of lymphadenitis caused by Mycobacterium orygis in an immunocompetent person in Stony Brook, New York, USA. Initial real-time PCR assay failed to provide a final subspecies identification within the M. tuberculosis complex, but whole-genome sequencing characterized the isolate as M. orygis.

25 February 2022 in IDCases
Verified
Journal Article
Open access
Luis A. MarcosLuis A. Marcos
Luis A. Marcos
ALAnnie Leung
Annie Leung
LKLaura Kirkman
Laura Kirkman
GWGary P. Wormser
Gary P. Wormser
Tafenoquine is a highly effective treatment for Babesia microti infections in animal models. An immunocompromised patient infected by a strain of B. microti that was at least partially resistant to both azithromycin and atovaquone was treated with tafenoquine. Systematic clinical studies using tafenoquine for treating other patients with babesiosis should be considered.

14 December 2020 in Expert Review of Anti-infective Therapy
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Journal Article
Closed access
Luis A. MarcosLuis A. Marcos
Luis A. Marcos
VMVicente Maco
Vicente Maco
ATAngelica Terashima
Angelica Terashima
: The only drug effective against the infection caused by Fasciola hepatica or F. gigantica is triclabendazole (TCBZ), recommended by the WHO and recently approved by the FDA. Here, we describe the...

1 December 2010 in Antimicrobial Agents and Chemotherapy
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Journal Article
Closed access
Luis A. MarcosLuis A. Marcos
Luis A. Marcos
BCBernard C. Camins
Bernard C. Camins
Emerging infections caused by vancomycin-intermediate Staphylococcus aureus (VISA) isolates are more likely to be associated with treatment failures than infections caused by other types of S. aureus . We present a case of pacemaker lead infective endocarditis caused by a non-daptomycin-susceptible strain of VISA. After 8 weeks of parenteral telavancin therapy, the patient achieved microbiological and clinical cure.

5 June 2013 in The American Journal of Tropical Medicine and Hygiene
Verified
Journal Article
Open access
PDF file
PFPeter U. Fischer
Peter U. Fischer
KCKurt C. Curtis
Kurt C. Curtis
SFScott M. Folk
Scott M. Folk
PWPatricia P. Wilkins
Patricia P. Wilkins
Luis A. MarcosLuis A. Marcos
Luis A. Marcos
GWGary J. Weil
Gary J. Weil
We studied the value of an IgG Western blot (WB) with Paragonimus kellicotti (Pk) antigen for diagnosis of North American paragonimiasis. The test was evaluated with sera from patients with Pk and Paragonimus westermani infections, with control sera from patients with other helminth infections, and sera from healthy Americans. All 11 proven Pk infection sera and two samples from suspected cases that were negative by P. westermani WB at the Centers for Disease Control and Prevention (CDC) contained antibodies to antigens at 34 kDa and at 21/23 kDa. Seven of 7 P. westermani sera contained antibodies to the 34 kDa antigen, but only 2 recognized the 21/23 kDa doublet. No control samples were reactive with these antigens. Antibody reactivity declined after praziquantel treatment. Thus, the P. kellicotti WB appears to be superior to P. westermani WB for diagnosing Pk infections, and it may be useful for assessing responses to treatment.