ABSTRACT
The COVID-19 pandemic has severely affected public health system and surveillance of other communicable diseases across the globe. The lockdown, travel constraints and COVID phobia turned down the number of people with illness visiting to the clinics or hospitals. Besides this, the heavy workload of SARS-CoV-2 diagnosis has led to the reduction in differential diagnosis of other diseases. Consequently, it added to the underlying burden of many diseases which remained under-diagnosed. Amidst the pandemic, the rise of emerging and re-emerging infectious diseases was observed worldwide and reported to the World Health Organization i.e., Crimean Congo Hemorrhagic Fever (2022, Iraq;2021 India), Nipah virus (2021, India), Zika virus (2021, India), and H5N1 influenza (2021, India), Monkeypox (2022, multicountry outbreak), Ebola virus disease (2022, DRC, Uganda;2021, DRC, Guinea;2020, DRC), Marburg (2022, Ghana;2021, Guinea), Yellow fever (2022, Uganda, Kenya, West and Central Africa;2021, Ghana, Venezuela, Nigeria;2020, Senegal, Guinea, Nigeria, Gabon;2020, Ethiopia, Sudan, Uganda), Dengue (2022, Nepal, Pakistan, Sao Tome, Temor-Leste;2021, Pakistan), Middle east respiratory syndrome coronavirus (2022, Oman, Qatar;2021, Saudi Arabia, UAE;2020, Saudi Arabia, UAE), Rift valley fever (2021, Kenya;2020, Mauritania), wild poliovirus type 1 (2022, Mozambique), Lassa fever (2022, Guinea, Togo, Nigeria;2020, Nigeria), Avian Influenza (H3N8) (2022, China), Avian Influenza (H5N1) (2022, USA), H10N3 influenza (2021, China), Hepatitis E virus (2022, Sudan), Measles (2022, Malawi, Afghanistan;2020, Burundi, Mexico), Mayaro virus disease (2020, French Guiana), Oropouche virus disease (2020, French Guiana). All these diseases were associated with high morbidity and burdened the public health system during the COVID-19 pandemic. During this critical public health menace, majority of the laboratory workforce was mobilized to the SARS-CoV-2 diagnosis. This has limited the surveillance efforts that likely led to under diagnosis and under-detection of many infectious pathogens. Lockdowns and travel limitations also put a hold on human and animal surveillance studies to assess the prevalence of these zoonotic viruses. In addition, lack of supplies and laboratory personnel and an overburdened workforce negatively impacted differential diagnosis of the diseases. This is especially critical given the common symptoms between COVID-19 and other pathogens causing respiratory illnesses. Additionally, the vaccination programs against various vaccine preventable diseases were also hampered which might have added to the disease burden. Despite these challenges, the world is better prepared to detect and respond to emerging/re-emerging pathogens. India now has more than 3000 COVID-19 diagnostic laboratories and an enhanced hospital infrastructure. In addition, mobile BSL-3 facilities are being validated for onsite sampling and testing in remote areas during outbreak situations and surveillance activities. This will undoubtedly be valuable as the COVID-19 pandemic evolves as well as during future outbreaks and epidemics. In conclusion, an increase in the emergence and re-emergence of viruses demonstrates that other infectious diseases have been neglected during the COVID-19 pandemic. Lessons learned from the infrastructure strengthening, collaborations with multiple stakeholders, increased laboratory and manufacturing capacity, large-scale COVID-19 surveillance, extensive network for laboratory diagnosis, and intervention strategies can be implemented to provide quick, concerted responses against the future threats associated with other zoonotic pathogens.
ABSTRACT
Case Report: A 4-year-old African American male presented to an outside emergency department (ED) following sudden inability to move left upper extremity. Past medical history was unremarkable and routine vaccinations were up to date. Radiograph of affected extremity ruled out fractures and patient was discharged to follow up with primary care physician. Two days later mother brought him to our ED due to persistent left upper extremity paralysis, poor appetite, and subjective fever. On exam his left arm was warm and tender to dull and sharp touch;he had definite loss of active movement, hypotonia and absence of deep tendon reflexes. The patient had winging of left scapula and could not shrug left shoulder. MRI of cervical and thoracic spine showed enlargement of spinal cord from C2-C6 level with gray matter hyperintensity, slightly asymmetric to the left. Laboratory studies showed leukocytosis (14 000/mcL) and CSF studies showed pleocytosis of 89 WBC/mcL (93.3% mononuclear cells and 6.7% polymorphonuclear cells), 0 RBCs, normal glucose and protein, and a negative CSF meningoencephalitis multiplex PCR panel. Due to high suspicion of demyelinating or autoimmune condition he was treated with high dose steroids and IVIG. Subsequently neuromyelitis optica was ruled out as aquaporin-4 receptor antibodies (AB) and myelin oligodendrocyte glycoprotein AB were normal. CSF myelin basic protein and oligoclonal bands were absent ruling out demyelinating disorders. CSF arboviruses IgM and West Nile IgM were negative. He showed minimal improvement in left upper extremity movement but repeat spinal cord MRI one week later showed improved cord thickness with less hyperintensity. Respiratory multiplex PCR was negative including enteroviruses. Repeat CSF studies after IVIG showed increased IgG index and IgG synthesis suggestive of recent spinal cord infection, consistent with acute flaccid myelitis (AFM). Pre-IVIG blood PCR was invalid for enteroviruses due to PCR inhibitors found in the sample. Blood post-IVIG was negative for mycoplasma IgM, West Nile IgM, and arboviruses IgM. Enterovirus panel titers (post-IVIG) were positive for coxsackie A (1:32), coxsackie B type 4 (1:80) and 5 (1:320), echovirus type 11 (1:160) and 30 (1:80) as well as positive for poliovirus type 1 and 3. These titers could not distinguish acute infection from patient's immunity or false-positives as a result of IVIG. He was discharged with outpatient follow-up visits with neurology, infectious disease, occupational and physical therapy, showing only mild improvement after discharge. Discussion(s):With the anticipated resurgence of AFM after the peak of COVID-19 pandemic, our case illustrates the need to consider this diagnostic possibility in patients with flaccid paralysis. It is important to remember CSF IgG synthesis is not affected by IVIG. In addition when treatment plans include IVIG, appropriate samples should be collected before IVIG to facilitate accurate work-up for infectious diseases. Copyright © 2023 Southern Society for Clinical Investigation.
ABSTRACT
BACKGROUND: Bulgaria is a country with a wide range of medicinal plants, with uses in traditional medicine dating back for centuries. METHODS: Disc diffusion assay was used to evaluate the antimicrobial activity of the plant extracts. A cytopathic effect inhibition test was used for the assessment of the antiviral activity of the extracts. The virucidal activity of the extracts, their influence on the stage of viral adsorption, and their protective effect on uninfected cells were reported using the end-point dilution method, and Δlgs was determined as compared to the untreated controls. RESULTS: The results of the study reveal that the antibacterial potential of G. glabra and H. perforatum extracts in Gram-positive bacteria is more effective than in Gram-negative bacteria. When applied during the replication of HSV-1 and HCov-OC-43, only some of the extracts showed weak activity, with SI between 2 to 8.5. Almost all tested extracts inhibited the extracellular virions of the studied enveloped viruses (HSV-1 and HCov-OC-43) to a greater extent than of the non-enveloped viruses (PV-1 and HAdV-5). They inhibited the stage of viral adsorption (HSV-1) in the host cell (MDBK) to varying degrees and showed a protective effect on healthy cells (MDBK) before they were subjected to viral invasion (HSV-1). CONCLUSION: The antipathogenic potential of extracts of H. perforatum and G. glabra suggests their effectiveness as antimicrobial agents. All 13 extracts of the Bulgarian medicinal plants studied can be used to reduce viral yield in a wide range of viral infections.