Browse Health
Pediatrician, Pediatric Specialist, Allergy & Immunology Specialist
20 years of experience


Education ?

Medical School
Universidad Nacional Mayor De San Marcos (1992)
Foreign school

Awards & Distinctions ?

American Academy of Allergy Asthma and Immunology

Affiliations ?

Dr. Montejo is affiliated with 4 hospitals.

Hospital Affiliations



  • Detroit Receiving Hospital & University Health Center
    4201 Saint Antoine St, Detroit, MI 48201
    Top 50%
  • Harper University Hospital
    3990 John R St, Detroit, MI 48201
    Top 50%
  • Sinai-Grace Hospital
    6071 W Outer Dr, Detroit, MI 48235
  • Children's Hospital of Michigan
    3901 Beaubien St, Detroit, MI 48201
  • Publications & Research

    Dr. Montejo has contributed to 6 publications.
    Title Safety of Topical Calcineurin Inhibitors for the Treatment of Atopic Dermatitis.
    Date August 2007
    Journal Pharmacotherapy

    Atopic dermatitis is a chronic, highly pruritic, and frequently recurring inflammatory skin disease that can be burdensome to affected individuals as well as to their family members, the health care system, and society as a whole. Immunomodulatory agents, such as topical corticosteroids and topical calcineurin inhibitors (TCIs), target the underlying immunopathology of atopic dermatitis and are the foundation of pharmacologic treatment for disease exacerbations. Recent recommendations from the United States Food and Drug Administration prompted the addition of a black-box warning and medication guide for tacrolimus ointment and pimecrolimus cream (both TCIs). The recommendations were based on a theoretical risk of malignancy derived from safety profiles, animal data, and reported cases of malignancy from clinical trials and postmarketing safety surveillance of oral calcineurin inhibitors. We know of no data that suggest that TCI use increases the risk of malignancy. Several dermatologic associations have issued statements supporting the safety of TCIs, and independent oncology experts have concluded that reported lymphomas were not related to TCI use. The black-box warning added to the TCI prescribing information also states that no causal link has been established. Effective treatment of atopic dermatitis can help alleviate the burden this disease imposes, and TCIs remain important treatment options.

    Title Infertile Men with Varicocele Show a High Relative Proportion of Sperm Cells with Intense Nuclear Damage Level, Evidenced by the Sperm Chromatin Dispersion Test.
    Date April 2006
    Journal Journal of Andrology

    The frequency of sperm cells with fragmented DNA was studied in a group of 18 infertile patients with varicocele and compared with those obtained in a group of 51 normozoospermic patients, 103 patients with abnormal standard semen parameters, and 22 fertile men. The spermatozoa were processed to discriminate different levels of DNA fragmentation using the Halosperm kit, an improved Sperm Chromatin Dispersion (SCD) test. In this technique, after an acid incubation and subsequent lysis, those sperm cells without DNA fragmentation show big or medium-sized halos of dispersion of DNA loops from the central nuclear core. Otherwise, those spermatozoa containing fragmented DNA either show a small halo, exhibit no halo with solid staining of the core, or show no halo and irregular or faint stain of the remaining core. The latter, that is, degraded type, corresponds to a much higher level of DNA-nuclear damage. The varicocele patients showed 32.4% +/- 22.3% of spermatozoa with fragmented DNA, significantly different from the group of fertile subjects (12.6% +/- 5.0%). Nevertheless, this was not different from that of normozoospermic patients (31.3% +/- 16.6%) (P = .83) and with abnormal semen parameters (36.6% +/- 15.5%) (P = .31). No significant differences were found between the normozoospermic patients and the patients with abnormal semen parameters. Strikingly, the proportion of the degraded cells in the total of sperm cells with fragmented DNA was 1 out of 4.2 (23.9% +/- 12.9%) in the case of varicocele patients, whereas it was 1 out of 8.2 to 9.7 in the normozoospermic patients (11.1% +/- 9.9%) in the patients with abnormal sperm parameters (12.2% +/- 8.3%) and in the fertile group (10.3% +/- 7.2%). Thus, whereas no differences in the percentage of sperm cells with fragmented DNA were evident with respect to other infertile patients, individuals with varicocele exhibit a higher yield of sperm cells with the greatest nuclear DNA damage level in the population with fragmented DNA. This finding illustrates the value of assessing different patterns of DNA-nuclear damage within each sperm cell and the particular ability of the Halosperm kit to reveal them.

    Title [community-acquired Pneumonia Due to Legionella Pneumophila Serogroup 1. Study of 97 Cases]
    Date January 2004
    Journal Enfermedades Infecciosas Y MicrobiologĂ­a ClĂ­nica

    INTRODUCTION: Legionella pneumophila is the causal agent of 5% to 12% of sporadic community-acquired pneumonia cases, though rates are changing with the use of new diagnostic methods. METHODS: This is a retrospective study of all patients admitted to our hospital with community-acquired pneumonia due to Legionella pneumophila between 1997 and 2001. Diagnostic criteria included either a positive Legionella serogroup 1 urinary antigen test or seroconversion and a chest radiograph consistent with pneumonia. RESULTS: A total of 97 patients were studied. Ninety cases (92.8%) were community-acquired and 7 (7.2%) were associated with travelling. In 82 cases (84.5%) the presentation was sporadic. Seventy-five patients were smokers (77.3%). The most common symptoms were fever in 91 patients (93.8%) and cough in 67 (68.1%). In five patients (5.2%) creatine phosphokinase concentrations were over 5 times their baseline values (in two over 100 times); four of these patients presented acute renal failure. Seroconversion was observed in 23/42 patients (54.8%). There were no statistically significant differences between the administration of erythromycin or clarithromycin in monotherapy, or in combination with rifampin. Nineteen patients (19.6%) presented acute renal failure and mechanical ventilation was necessary in 22 (22.7%). Twelve patients died (12.5%). Independent prognostic factors associated with death included respiratory rate > 30 breaths/min, urea > 60 mg/dL and PaO2 < 60 mmHg. A significant linear association was found between severity scale scores and the presence of complications or mortality. CONCLUSION: The Legionella urinary antigen test permits early diagnosis and treatment of this disease. The severity scale is an indicator of complications or death.

    Title Identification of Twenty-one New Mutations in the Factor Ix Gene by Sscp Analysis.
    Date March 1999
    Journal Human Mutation

    In this study we have analyzed the factor IX gene from 84 hemophilia B patients of Spanish origin. It included single-strand conformation polymorphism (SSCP) analysis of all functional regions of the gene and further sequencing of all fragments showing abnormal migration. In 76 patients (90.4%), it was possible to identify molecular alterations leading to the appearance of the disease. Twenty-one new mutations were identified, including 13 missense mutations, two nonsense mutations, three splice-site mutations, one frameshift deletion, one frameshift insertion, and one non-frameshift deletion. The approach appears to be very suitable for molecular diagnosis of hemophilia B.

    Title Open, Randomized Therapeutic Trial of Six Antimicrobial Regimens in the Treatment of Human Brucellosis.
    Date July 1993
    Journal Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America

    This report describes the results of six antimicrobial regimens used for the treatment of brucellosis in an open, randomized study performed over two periods (1980-1983 and 1984-1987). In the first period, rifampicin and doxycycline were used for 4 weeks, trimethoprim-sulfamethoxazole for 6 months, and doxycycline for 6 weeks. During the second period, we used streptomycin for 2 or 3 weeks together with doxycycline for 6 weeks and rifampicin with doxycycline for 6 weeks. Comparison of the results showed the following: (1) no statistically significant findings were revealed when the different regimens were compared and (2) the regimens containing streptomycin yielded statistically more favorable results than those consisting of rifampicin and monotherapy when the patients treated with rifampicin were compared with those taking streptomycin and those receiving single-agent therapy. No significant differences were observed between monotherapeutic regimens and those including rifampicin.

    Title Conformation of Human Fibrinogen in Solution from Polarized Triplet Spectroscopy.
    Date September 1992
    Journal Biochemistry

    The rotational motions of human fibrinogen in solution at 20 degrees C have been examined, in the 0.2-12-microseconds time range, by measuring the laser-induced dichroism of the triplet state of an erythrosin probe covalently bonded to the protein. The decay of the anisotropy was multiexponential, and up to three correlation times (phi 1 = 380 +/- 50 ns, phi 2 = 1.1 +/- 0.1 microseconds, and phi 3 = 3.3 +/- 0.6 microseconds) were needed to obtain a satisfactory analysis. The experimental data are consistent with the brownian motions of an elongated, rigid particle. If the correlation times are combined with previous data on the intrinsic viscosity of fibrinogen, the rotational and translational diffusive properties of the protein can be reproduced with high accuracy by idealizing it as an elongated ellipsoid of revolution with dimensions (2a x 2b) of (54 +/- 6) x (7.2 +/- 0.5) nm, having rotational diffusion constants of D parallel = (6.2 +/- 0.7) x 10(5) s-1 and D perpendicular = (5 +/- 1) x 10(4) s-1. The possibility of Ca(2+)-dependent changes in the rigidity or conformation of fibrinogen was excluded by examining the submicrosecond time-resolved fluorescence depolarization of 1-methylpyrene conjugates of the protein in the presence of different calcium concentrations. Although there are inherent difficulties to extrapolate the data on isolated fibrinogen molecules to the polymerizing species, this relatively stiff conformation meets the requirements of the classical half-staggered double-stranded model of fibrin polymerization rather better than those of the recently proposed interlocked single-stranded mechanism.

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