Post-mortem diagnosis of human rabies in SARS-CoV-2 coinfected patient with minimally invasive autopsy in northeastern Brazil.

INTRODUCTION: Human rabies (HR) is a lethal zoonotic disease caused by lyssaviruses with increase in the number of cases post-coronavirus disease 2019 (COVID-19) pandemic. METHODOLOGY: We report a case of human rabies in a patient from a rural area of Ceará, northeastern Brazil in 2023, who was bitten by a white-tufted-ear marmoset (Callithrix jacchus jacchus). The patient was co-infected with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and was diagnosed by minimally invasive autopsy (MIA). RESULTS: MIA offers many advantages related to biosafety, and speed of sample acquisition; and markedly reduces disfigurement of the body compared with complete autopsy. It is a great alternative in COVID-19 patients. CONCLUSIONS: New methods such as MIA are a promising tool for diagnosis, and have the potential to improve family cooperation and support rabies surveillance.

Detection of coinfection with Primate Erythroparvovirus 1 and arboviruses (DENV, CHIKV and ZIKV) in individuals with acute febrile illness in the state of Rio Grande do Norte in 2016.

BACKGROUND: Arthropod-borne viruses, known as arboviruses, pose substantial risks to global public health. Dengue (DENV), Chikungunya (CHIKV) and Zika (ZIKV) viruses stand out as significant concerns in Brazil and worldwide. Their overlapping clinical manifestations make accurate diagnosis a challenge, underscoring the need for reliable laboratory support. This study employs a comprehensive molecular diagnostic approach to track viral infections in individuals with acute febrile illness, a period marked by widespread outbreaks of DENV, CHIKV and ZIKV. METHODS: Between January and August 2016, we received a total of 713 serum samples obtained from individuals with acute febrile illness, previously tested for DENV, CHIKV or ZIKV, with initial negative results, from LACEN-NATAL. Of the total 713 samples, 667 were from females (354 of them pregnant) and 46 from males. Molecular diagnosis was conducted using the Multiplex RT-qPCR technique for simultaneous detection of DENV, CHIKV and ZIKV. Additionally, we performed differential diagnosis by RT-qPCR for other viruses of the Flavivirus, Alphavirus Enterovirus genera and qPCR for Primate Erythroparvovirus 1 (B19V) species, in accordance with Ministry of Health guidelines. RESULTS: Among the 713 cases, 78.2% tested positive for viral infections, including 48% with CHIKV viremia, 0.6% with DENV and 0.1% with ZIKV. Arboviral coinfections totaled 2.4%, including DENV-CHIKV (1.7%) and CHIKV-ZIKV (0.7%). Moreover, 8% exhibited B19V viremia. Simultaneous infections were identified in 17.5%, encompassing B19V-CHIKV (17.1%), B19V-DENV (0.1%), and B19V-ZIKV (0.3%) Triple infections were observed in 1.3% of cases with B19V-DENV-CHIKV (1%) and B19V-CHIKV-ZIKV (0.3%). CONCLUSION: Molecular testing demonstrated high efficacy in diagnosing prevalent arboviruses and detecting multiple coinfections. This approach helps to elucidate etiologies for symptomatic cases, especially during arbovirus outbreaks, and aids comprehensive surveillance. Our findings underscore the importance of monitoring co-circulating pathogens, such as B19V, with implications for clinical management, particularly in pregnant individuals. This study enhances our understanding of arbovirus epidemiology and reinforces the critical role of molecular diagnosis in disease surveillance and control.

Double Trouble: An Unusual Keratitis Case of Herpes Simplex Virus and Varicella-Zoster Virus Co-infection.

PURPOSE: The aim of this study was to describe a case of herpes simplex virus (HSV) and varicella-zoster virus (VZV) corneal co-infection in a patient with systemic immunosuppression. METHODS: A 77-year-old White man who was recently administered pembrolizumab present with reduction in visual acuity in his left eye from 20/25 to 20/50. There was a known history of ocular HSV keratitis. Slit-lamp examination showed superficial dendritic lesions suggestive of VZV. RESULTS: Viral polymerase chain reaction testing was positive for both HSV and VZV, confirming clinical diagnosis of VZV keratitis in the setting of recurrent HSV keratitis. The infection responded to treatment with topical trifluridine. Two months later, he had another episode of keratitis based on his symptoms reported through telephone encounter which resolved with trifluridine. Unfortunately, the patient committed suicide 4 months after onset. CONCLUSIONS: This is the first case of keratitis with HSV and VZV co-infection likely related to systemic immunosuppression. Clinicians should have a high suspicion for viral co-infections in the setting of systemic immunosuppression.

Co-infection of Leishmania infantum and a Crithidia-related species in a case of refractory relapsed visceral leishmaniasis with non-ulcerated cutaneous manifestation in Brazil.

We report a refractory and relapsed visceral leishmaniasis case in a male child patient followed from 2016 to 2020, whose clinical isolates from multiple relapses were analyzed at the genome level. To the best of our knowledge, it is the first report that both visceral leishmaniasis and non-ulcerated cutaneous leishmaniasis have concomitantly manifested in the same patient. Importantly, sequence analysis revealed that the patient was co-infected with Leishmania infantum and a Crithidia-related parasite, which was previously found in a fatal case of visceral leishmaniasis from the same endemic region.

Necrotising pneumonia caused by Curvularia hawaiiensis (syn. Bipolaris hawaiiensis) and Mycobacterium tuberculosis coinfection in a patient with ascariasis: a case report and review.

INTRODUCTION: Curvularia hawaiiensis (formerly Bipolaris hawaiiensis) is a plant pathogen often isolated from soil and vegetative material. However, only a few cases of opportunistic invasive infections in humans have been described. CASE: A 16-year-old female patient without comorbidities was admitted to the emergency department because of fever and chest pain. We described the first coinfection of Curvularia hawaiiensis and Mycobacterium tuberculosis necrotising pneumonia. DISCUSSION: Multiple infections can alter immune responses. However, immunosuppression is the most critical risk factor for infection with species of the genus Curvularia. Therefore, it is crucial to carefully examine patients with tuberculosis, as they may rarely be coinfected with unusual fungi.

Detection of DENV-2 and ZIKV coinfection in southeastern Brazil by serum and urine testing.

PURPOSE: Aedes aegypti mosquito-borne diseases have a significant impact on public health in Brazil. In this study, we investigated the presence of the Zika virus (ZIKV) and dengue virus (DENV) in serum and urine samples from symptomatic participants who attended an Emergency Care Unit located in a city in the northwestern region of São Paulo between February 2018 and April 2019. METHODS: Serum and urine samples were collected from participants suspected of having arbovirus infection. After the extraction of viral RNA, viral detection was performed by real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR) (One-Step RT-qPCR). RESULTS: A total of 305 participants participated in this study. A total of 283 blood and 270 urine samples were collected. Of 305 patients, 36.4% (111/305) were positive for ZIKV, 43.3% (132/305) for DENV2, and 0.3% (1/305) for DENV1. Coinfection with ZIKV/DENV2 was observed in 13.1% of participants. If only serum samples were used, ZIKV detection would have decreased to 23.3% (71/305). Of all the participants included in the study, only one was suspected of having ZIKV infection based on clinical diagnosis, and the remaining participants were suspected of having DENV. CONCLUSION: By testing serum and urine samples, we increased the detection of both viruses and detected considerable levels of ZIKV and DENV-2 coinfection when compared to other studies. Additionally, we detected an unnoticed ZIKV outbreak in the city. These findings highlight the importance of the molecular diagnosis of arboviruses to aid public health surveillance and management strategies.

A multiplex-NGS approach to identifying respiratory RNA viruses during the COVID-19 pandemic.

A methodological approach based on reverse transcription (RT)-multiplex PCR followed by next-generation sequencing (NGS) was implemented to identify multiple respiratory RNA viruses simultaneously. A convenience sampling from respiratory surveillance and SARS-CoV-2 diagnosis in 2020 and 2021 in Montevideo, Uruguay, was analyzed. The results revealed the cocirculation of SARS-CoV-2 with human rhinovirus (hRV) A, B and C, human respiratory syncytial virus (hRSV) B, influenza A virus, and metapneumovirus B1. SARS-CoV-2 coinfections with hRV or hRSV B and influenza A virus coinfections with hRV C were identified in adults and/or children. This methodology combines the benefits of multiplex genomic amplification with the sensitivity and information provided by NGS. An advantage is that additional viral targets can be incorporated, making it a helpful tool to investigate the cocirculation and coinfections of respiratory viruses in pandemic and post-pandemic contexts.

The first case of acute HIV and monkeypox coinfection in Latin America.

Monkeypox (MPX) transmission outside non-endemic countries has been reported since May 2022, rapidly evolving into a multi-country outbreak. A potential role of sexual contact in transmission dynamics, as well as a predominance of anogenital lesions, are remarkable features of current cases. Screening for sexually transmitted infections (STIs) plays an important role in the evaluation of patients with suspected MPX infection. Herein we report the first case of a patient diagnosed with both MPX and acute HIV infection in Latin America. He had no major complications during his clinical course, and antiretroviral therapy was promptly initiated. Diagnosis of acute HIV requires a high level of suspicion and appropriate laboratory investigation. Health practitioners need to consider this diagnosis while evaluating patients with suspected MPX with a recent unprotected sexual contact.

Plasmodium vivax and SARS-CoV-2 co-infection in Venezuelan pregnant women: a case series.

BACKGROUND: Malaria-endemic areas are not spared from the impact of coronavirus disease 2019 (COVID-19), leading to co-infection scenarios where overlapping symptoms impose serious diagnostic challenges. Current knowledge on Plasmodium spp. and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) co-infection in pregnant women remains limited, especially in Latin America, where Plasmodium vivax infection is highly prevalent. METHODS: This is a case series of five pregnant women with P. vivax and SARS-CoV-2 co-infection hospitalized in two main malaria referral centers of the Capital District and Bolivar state, Venezuela between March 13, 2020 and December 31, 2021. RESULTS: Clinical and laboratory data from five pregnant women with a mean age of 22 years were analyzed; three of them were in the third trimester of pregnancy. Comorbidities included obesity in two cases, hypertension in one, and asthma in one. Three out of five patients had severe to critical COVID-19 disease. Dry cough, fever, chills, and headache were the most frequent symptoms reported. Laboratory analyses showed elevated aspartate/alanine aminotransferase and creatinine levels, thrombocytopenia, and severe anemia as the most relevant abnormalities. The mean period between symptom onset and a positive molecular test for SARS-CoV-2 infection or positive microscopy for Plasmodium spp. was 4.8 ± 2.5 days and 2.8 ± 1.6 days, respectively. The mean hospital stay was 5.4 ± 7 days. Three women recovered and were discharged from the hospital. Two women died, one from cerebral malaria and one from respiratory failure. Three adverse fetal outcomes were registered, two miscarriages and one stillbirth. CONCLUSION: This study documented a predominance of severe/critical COVID-19 disease and a high proportion of adverse maternal-fetal outcomes among pregnant women with malaria and COVID-19 co-infection. More comprehensive prospective cohort studies are warranted to explore the risk factors, management challenges, and clinical outcomes of pregnant women with this co-infection.

A case of monkeypox and cytomegalovirus coinfection manifesting with crusted lesions mimicking rupiod syphilis.

Human monkeypox is a viral zoonosis that has recently emerged worldwide. Clinical cutaneous features include papules, vesicles, and pustules. However, atypical manifestations mimicking other infectious diseases are being reported more frequently. We present a 41-year-old man patient with untreated HIV with generalized rupioid crusted ulcerated plaques with perineal ulceration that were found to represent monkeypox and cytomegalovirus infections.

Paciente con quistes pulmonares y diagnóstico de coinfección con tuberculosis e hidatidosis: reporte de un caso pediátrico / Patient with pulmonary cysts and diagnosis of co-infection with tuberculosis and hydatidosis. Pediatric cases report

Existen numerosas entidades en la población pediátrica que pueden presentarse en forma de quistes o como lesiones de similares características. De estas patologías, las infecciosas son las más frecuentes. Se presenta el caso de una paciente oriunda de Bolivia con migración reciente a la Argentina que presentó una coinfección con tuberculosis e hidatidosis pulmonar. Ambas infecciones se pueden presentar con signos y síntomas similares y, aunque la asociación citada es poco frecuente en la bibliografía, ciertos mecanismos inmunitarios podrían intervenir en la coinfección de parásitos helmintos y micobacterias. Ambas patologías son infecciones prevalentes en nuestra región y deben ser tenidas en cuenta entre los diagnósticos diferenciales ante pacientes con imágenes quísticas o cavitarias pulmonares.

Numerous entities in the pediatric population can present in the form of cysts or as lesions with similar characteristics. Of the pathologies that can cause these images in children, infectious diseases are the most frequent. We present the case of a native of Bolivia with recent immigration to Argentina who presented a pulmonary co-infection with tuberculosis and hydatidosis. Both infections can present with similar signs and symptoms and although this association is rarely reported in the literature, certain immunological mechanisms could intervene in the causal association of co-infection between helminth parasites and mycobacteria. Both pathologies are very prevalent infections in our region and should be taken into account among the differential diagnoses in patients with cystic or cavitary pulmonary diseases.

[Patient with pulmonary cysts and diagnosis of co-infection with tuberculosis and hydatidosis. Pediatric cases report]. / Paciente con quistes pulmonares y diagnóstico de coinfección con tuberculosis e hidatidosis: reporte de un caso pediátrico.

Numerous entities in the pediatric population can present in the form of cysts or as lesions with similar characteristics. Of the pathologies that can cause these images in children, infectious diseases are the most frequent. We present the case of a native of Bolivia with recent immigration to Argentina who presented a pulmonary co-infection with tuberculosis and hydatidosis. Both infections can present with similar signs and symptoms and although this association is rarely reported in the literature, certain immunological mechanisms could intervene in the causal association of co-infection between helminth parasites and mycobacteria. Both pathologies are very prevalent infections in our region and should be taken into account among the differential diagnoses in patients with cystic or cavitary pulmonary diseases.

Existen numerosas entidades en la población pediátrica que pueden presentarse en forma de quistes o como lesiones de similares características. De estas patologías, las infecciosas son las más frecuentes. Se presenta el caso de una paciente oriunda de Bolivia con migración reciente a la Argentina que presentó una coinfección con tuberculosis e hidatidosis pulmonar. Ambas infecciones se pueden presentar con signos y síntomas similares y, aunque la asociación citada es poco frecuente en la bibliografía, ciertos mecanismos inmunitarios podrían intervenir en la coinfección de parásitos helmintos y micobacterias. Ambas patologías son infecciones prevalentes en nuestra región y deben ser tenidas en cuenta entre los diagnósticos diferenciales ante pacientes con imágenes quísticas o cavitarias pulmonares.

Tuberculosis/HIV co-infection in Northeastern Brazil: Prevalence trends, spatial distribution, and associated factors.

INTRODUCTION: The objective was to analyze the prevalence trend, spatial distribution, and TB-HIV co-infection-associated factors in an endemic scenario for TB in Northeastern Brazil. METHODS: An ecological and temporal series study was conducted based on secondary data obtained from the Brazilian Notifiable Diseases Information System between January 2008 and December 2019. The prevalence rates were determined for each year and the average for the period. Prais-Winsten regressions were used for temporal variation analysis, scanning techniques were used to detect spatial clusters, and the Poisson regression model was used to explore the factors associated with the outcome. RESULTS: A total of 947 TB cases were reported, of which 501 (52.9%) underwent HIV testing, and of these, 73 were positive. The average prevalence was 20.0%, ranging from 1.5% in 2018 to 44.4% in 2009. A decreasing trend was found. Sixty-seven cases (92%) were geocoded, and two statistically significant (p < 0.005) high relative risk (RR) spatial clusters were detected. Statistically significant associations (p < 0.05) between the co-infection and variables such as male gender, living in the urban area, entry due to relapse, and case closure due to loss to follow-up were evidenced, and these variables constituted risk factors. CONCLUSIONS: A decreasing prevalence of TB-HIV co-infection has been found, as well as a heterogeneous spatial distribution with the formation of spatial clusters in urban areas characterized by socio-spatial inequalities associated with clinical-epidemiological factors. Such findings provide subsidies for rethinking health care activities and improving public policies for vulnerable populations.

Coinfection and cross-reaction of dengue and COVID-19: a case series analysis.

BACKGROUND: The risk of possible cross-reactions between serological tests, together with the clinical similarities between dengue fever and COVID-19, can delay diagnosis and increase the risk of both COVID-19 transmission and worsening. The present study aimed to determine the possibility of cross-reactions among rapid serological tests based on clinical symptoms. METHODS: Patients with COVID-19, confirmed by RT-PCR and clinical criteria for diagnosing dengue, were recruited consecutively between September 2020 and August 2021 and underwent rapid immunochromatographic diagnostic (RID) tests for AgNS1, IgM, and IgG. Patients who tested positive for acute-phase dengue IgM and AgNS1 underwent a follow-up test after 12-30 days for diagnostic confirmation. RESULTS: A total of 43 patients were included, 38 of whom required hospital admission, and 8 received intensive care. Seven patients tested positive on the RID tests, comprising 2 NS1 positive (coinfection), one reactive for IgM and IgG (coinfection), three reactive for IgM not confirmed (false-positive), and one reactive for IgG due to previous infection. Two of the 3 patients with coinfection died. Fever, myalgia, headache, and cough were the most common clinical symptoms, while lymphopenia was the most prevalent laboratory finding. CONCLUSIONS: Cross-reactivity was found in only three patients and coinfection in another three patients, two of whom died of severe COVID-19 manifestations.

[Is dengue and COVID-19 coinfection or misdiagnosis possible? A review on reported cases]. / ¿Es posible la coinfección o un diagnóstico erróneo por dengue y COVID-19? Una revisión de reporte de casos.

BACKGROUND: Novel coronavirus has continued to spread throughout the world where there are other endemic diseases that have been a burden to public health for many years. As any infection, it was expected there could be coinfection between these. Tropical and subtropical countries are currently managing with dengue as peaks increase with shorter periods of time. AIM: To summarize the evidence that exists in the co-infection related to SARS-CoV-2 and the dengue virus. METHOD: We conducted a narrative review in data bases about reports of coinfection and misdiagnosis of SARS-CoV-2 and dengue virus given the fact that rainy season every year increase the prevalence of viral infections in endemic countries. Recent reports have even described positive cases in one of these infections that later resulted in false positive. A positive test for COVID-19 or dengue fever in endemic areas should not exclude the other infection. CONCLUSION: From now on, these two should be considered as a differential diagnosis and this should raise public health concern for COVID-19 and dengue coinfection in endemic countries to reinforce promotion and prevention to communities to prevent these diseases.

Chromoblastomycosis-Leprosy Co-Infection in Central West Brazil. Presentation of Three Cases and Literature Review.

Chromoblastomycosis and leprosy are chronic diseases with high prevalence in tropical and subtropical regions. Brazil is one of the countries with the highest incidence and prevalence for both diseases, however, reports of co-infections are scarce. The aim of this study was to describe three cases of chromoblastomycosis-leprosy co-infection in patients from Mato Grosso state, Brazil. A review of chromoblastomycosis-leprosy co-infection was performed of English, Portuguese and Spanish publications in LILACS, SciELO, PubMed and Web of Science databases using the descriptors (chromoblastomycosis OR cromoblastomicose OR cromoblastomicosis) AND (leprosy OR hanseníase OR lepra), without time period delimitation. Nineteen cases were included, 16 cases were published in 11 articles, plus the three cases reported in the current study. Most reported coninfection cases came from Brazil. Majority of the patients were male with a mean age of 52.2 years. Farmer was the main occupational activity reported. In 12 patients, the clinical signs and symptoms of leprosy started first. No contacts with patients affected by leprosy, armadillos or history of injuries at the anatomical site of chromoblastomycosis lesions were reported. Five leprosy patients who received steroid treatment for leprosy reactions or neuropathies, were diagnosed with chromoblastomycosis during immunosuppressive therapy. Four cases (21.1%) were reported among the elderly patients. Co-infections in patients with chromoblastomycosis or leprosy are uncommon, but the possibility should always be considered, especially if the patient is undergoing immunosuppressive treatment or is elder.

Fungal Bloodstream Co-infection by Trichosporon asahii in a COVID-19 Critical Patient: Case Report and Literature Review.

Opportunistic infections are serious complications in critically ill COVID-19 patients, especially co-infections with bacterial and fungal agents. Here we report a rare case of bloodstream co-infection by Trichosporon asahii, an emerging yeast, and Acinetobacterbaumannii, an opportunistic nosocomial pathogen, both multidrug resistant, in a tertiary hospital from southern Brazil. A review of the literature regarding similar cases is also included. Treatment with multiple antimicrobials failed, and the patient progressed to death four days after the diagnosis of bacteremia and fungemia.

Detection of SARS-CoV-2 antibodies in febrile patients from an endemic region of dengue and chikungunya in Peru.

INTRODUCTION: The rapid expansion of the novel SARS-CoV-2 virus has raised serious public health concerns due to the possibility of misdiagnosis in regions where arboviral diseases are endemic. We performed the first study in northern Peru to describe the detection of SARS-CoV-2 IgM antibodies in febrile patients with a suspected diagnosis of dengue and chikungunya fever. MATERIALS AND METHODS: A consecutive cross-sectional study was performed in febrile patients attending primary healthcare centers from April 2020 through March 2021. Patients enrolled underwent serum sample collection for the molecular and serological detection of DENV and CHIKV. Also, serological detection of IgM antibodies against SARS-CoV-2 was performed. RESULTS: 464 patients were included during the study period, of which (40.51%) were positive for one pathogen, meanwhile (6.90%) presented co-infections between 2 or more pathogens. The majority of patients with monoinfections were positive for SARS-CoV-2 IgM with (73.40%), followed by DENV 18.09% and CHIKV (8.51%). The most frequent co-infection was DENV + SARS-CoV-2 with (65.63%), followed by DENV + CHIKV and DENV + CHIKV + SARS-CoV-2, both with (12.50%). The presence of polyarthralgias in hands (43.75%, p<0.01) and feet (31.25%, p = 0.05) were more frequently reported in patients with CHIKV monoinfection. Also, conjunctivitis was more common in patients positive for SARS-CoV-2 IgM (11.45%, p<0.01). The rest of the symptoms were similar among all the study groups. CONCLUSION: SARS-CoV-2 IgM antibodies were frequently detected in acute sera from febrile patients with a clinical suspicion of arboviral disease. The presence of polyarthralgias in hands and feet may be suggestive of CHIKV infection. These results reaffirm the need to consider SARS-CoV-2 infection as a main differential diagnosis of acute febrile illness in arboviruses endemic areas, as well as to consider co-infections between these pathogens.

¿Es posible la coinfección o un diagnóstico erróneo por dengue y COVID-19? Una revisión de reporte de casos / Is dengue and COVID-19 coinfection or misdiagnosis possible? A review on reported cases

INTRODUCCIÓN: El nuevo coronavirus ha continuado propagándose por todo el mundo donde existen otras enfermedades endémicas que han sido una carga para la salud pública durante muchos años. Como cualquier infección, se habría esperado encontrar en coinfección con algunas de éstas. Específicamente, los países tropicales y subtropicales han venido manejando la carga del dengue a medida que aumentan los picos con períodos de tiempo más cortos. OBJETIVO: Resumir la evidencia que existe en la coinfección relacionada con el SARS-CoV-2 y el virus del dengue. METODOLOGÍA: Se realizó una revisión narrativa en bases de datos sobre reportes de coinfección y diagnóstico erróneo de SARS-CoV-2 y el dengue dado que la temporada de lluvias cada año aumenta la prevalencia de infecciones virales en países endémicos. Informes recientes incluso han descrito casos positivos en uno de estas infecciones que luego resultaron en falso positivo. Una prueba positiva para COVID-19 o fiebre del dengue en áreas endémicas no debe excluir la otra infección. CONCLUSIÓN: A partir de ahora, estos dos deberían ser considerados como un diagnóstico diferencial y esto debe generar preocupación de salud pública por su coinfección en países endémicos para reforzar la promoción y prevención a las comunidades y mitigar estas enfermedades.

BACKGROUND: Novel coronavirus has continued to spread throughout the world where there are other endemic diseases that have been a burden to public health for many years. As any infection, it was expected there could be coinfection between these. Tropical and subtropical countries are currently managing with dengue as peaks increase with shorter periods of time. AIM: To summarize the evidence that exists in the co-infection related to SARS-CoV-2 and the dengue virus. METHOD: We conducted a narrative review in data bases about reports of coinfection and misdiagnosis of SARS-CoV-2 and dengue virus given the fact that rainy season every year increase the prevalence of viral infections in endemic countries. Recent reports have even described positive cases in one of these infections that later resulted in false positive. A positive test for COVID-19 or dengue fever in endemic areas should not exclude the other infection. CONCLUSION: From now on, these two should be considered as a differential diagnosis and this should raise public health concern for COVID-19 and dengue coinfection in endemic countries to reinforce promotion and prevention to communities to prevent these diseases.