New Onset Viral COVID19 Infection in Two End Stage Renal Disease Patients on Extracorporeal Hemodialysis Treatment

The first patient is a 62-years-old Caucasian male, affected by adult polycystic kidney disease in extracorporeal hemodialysis through an arterio-venous native fistula. The subject had presented fever for about a month and a half before being admitted.

ment to another or during and after the surgical session (even if the surgery room is ventilated with a negative pressure that avoids spreading, in addition to other measures to keep the room sterile for a surgery session).
At the admittance the patient one performed a C.T. -Total Body scan looking for any septic focus beyond the known data of infected cyst with consensual abscess. The result did not show a radiological imaging associable to lung viral infection by coronavirus (the "ground glass" and "crazy pavel" pattern as know).
He was examined also with a positron emission tomog-raphy imaging (SPECT) that showed increasing in leucocyte captation on suspected infected cists kidney's side.
The patient was dialyzed for nine days in the critical area in a continuous technique (continuous replacement therapy) and died on day ten.
The second case is a male Caucasian 68-years-old patient, affected by end stage renal disease and put on hemodialysis chronic treatment using an arterio-venous fistula. The fever was noted during the hemodialysis session in the clinic but also at home for about a week before the admittance to the hospital.
After performing a transthoracic cardiac ultrasound and a trans-esophageal study for the diagnosis of possible cardi-ac vegetations and structural alteration of the mitral valve (DUKE criteria), a computed vascular CT of the chest was per-formed that led to an endocarditis' diagnosis.
The blood culture sampled on day one showed the pres-ence of "Streptococcus Mitis" and the patient started antibi-otic intravenous therapy according to antibiogram in previ-sion of cardiac surgery.
Due to the persistence of high fever (> 39 °C) and due to COVID-19 pandemic period, nasal and oropharyngeal swab were carried out looking for COVID-19. The result was pos-itive! Consequently he was placed in isolation and he was given personal protective equipment to ensure the personnel safety.
The following appearance of hemodynamic instability and worsening of respiratory acts, with the need for respi-ratory support with intubation, made necessary to transfer the patient into the intensive care unit in a sterile room. A temporary vascular access (right femoral vein) was posi-tioned and the patient started a continuous hemodialysis treatment (CVVHDF) with high absorption filter (cytosorb) to remove the inflammatory mediators of the same acute phase in a treatment of three consecutive sessions [6][7][8][9][10].
The anticoagulant used in the "CRRT" hemodialysis ses-sion was seleparine (light weight molecular eparine) titrated on the dry weight and the time needed of the session.
All the health workers assigned to its control (nurses, medical doctors, others) were equipped with personal pro-tective equipment (PPE or DPI). None of the hemodialized patient doing hemodialysis with him (before COVID-19 test) showed symptoms or fever. So where and mainly how did he get the infection? It could have occurred during the transfer from his own department to the radiology's one or during transfer to the hemodialysis' department.
Many cases and study report that the COVID-19 "flugge" and "droplet" can survive on many surfaces and areas from nine to fourteen hours before the viral load decreases by 50% of his contagiousness.
So the infection can happen in the transfer from a depart- In this patient it was observed a reduction of the thermal curve in the first phase of admission (after endocarditis' diagnosis and antibiotics therapy). Subsequently a stable body high temperature was measured (39 °C-40 °C) and antipyretics drugs treatment was started at high doses intravenously (Tachipirine 1 gram per I.V. up to four times per day and/or acetylsalicylic acid at the dose of 250 mg per I.V. up to one gram per day).
A nowadays patient is still alive and does hemodialysis on three day/week rhythm in a dedicated COVID department room.

Discussion
The epidemic of coronavirus disease 19 (COVID-19) has spread rapidly around the globe with considerable morbidity and mortality. So the co-infection can be very frequent in the general population, particularly in patients with older age and several comorbidities.
Previous studies assume that COVID-19 infected patients with chronic comorbidities can more easily have severe complications [11,12]. Patients with end-stage renal disease who are dialysis dependent can be at great risk of COVID-19 infection due to suppression of the immune system. It has been suggest that T-cell immunity plays an important role and the uremia status is associated with extensive impairment of lymphocyte and granulocyte function. An abnormal immune system can alter their response to Sars-CoV infection [13].
In this report we describe two COVID-19-infected hemodialysis patients who are referred in our hospital for different pathologies. During hospitalization both patients presented fever and the increase of inflammation markers. CT of the chest was done (Figure 1 and Figure 2) and COVID-19 testing was performed. The result of which were positive for COVID-19 infection.
The two patients were isolated and moved into dedicated dialysis room. Both of them continued extracorporeal replacement hemodialysis therapy, one in a continuous mode After about two weeks of antibiotic therapy and daily control of the thermal curve (periodic oscillations within 38 °C) he presented a new high fever appearance (> 39 °C) associated with dry and irritating cough. These symptoms were not present at the admittance.
Suspecting a viral super-infection of COVID-19, in these critical pandemic period, a chest X-ray and then an high resolution Chest-CT-scan (HRTC) was performed: It showed an highly specific and predictive imaging of viral infection by COVID-19 ("ground glass" radiological pattern in the lung bilaterally).
Laboratory tests showed anemization (despite of intravenous support with erythropoietin administration done at the end of any hemodialysis session so he performed at least one transfusion of concentrated red blood cells to cope with acute anemia), leukopenia with relative lymphocytosis, and decrease in PCR, PCT and VES, no alteration of transaminases.
At the same time, after consultation about infectious disease, the oropharyngeal and nasal swab was performed. Even in this case the result was positive.
Very difficult to know where he was infected. He was recovered in nephrology department and he was moved to the dialysis service (placed at the ground zero of the same building) and moved to the cardiac-surgery department for a hearth eco-scanning.
In all such cases he was transferred wearing a mask since the OMS declared the world-wide pandemic (11 th , March 2020).
So he was quickly placed into isolation and he continued replacement hemodialysis therapy wearing individual protection devices inside a dedicated dialysis room. The other outpatients had no symptoms or fever and continued their own hemodialysis weekly sessions wearing mask just entering the clinic and washing accurately their hands and the fistula in the arm with alcoholic sterile solution before starting hemodialysis session. Open Access | Page 56 | COVID-19 is a challenge to our health systems because of its novelty, rapidity of spread and mortality. This pandemic has required and continues to require broad attention of public health official to implement social distancing to mitigate the rapid spread of this highly contagious and potentially life-threatening novel virus, particularly for the people at risk of developing complications.
in the intensive care unit and the other one in a dedicated dialysis chamber. The goal was to isolate these cases to minimize the risk of local clustered transmission. Moreover several measures had been taken: The use of masks for all health workers and patients and drivers of organized transport were instructed not to transfer patients, unless masks were worn.
We assume COVID-19 infection could be happen during transfer from their own department to others or from any asymptomatic carriers (nurse, doctors, health workers) that had contact with them.
This case report highlights the importance of considering COVID-19 infection in a variety of clinical presentation that may not initially include typical respiratory symptom to prevent ongoing exposure of potentially affected individuals to the general population. It is also important the need for rapidly available testing for all patients who present to healthcare setting [14].
In some high-risk populations, such as dialysis patients, where several individuals are treated at the same time in a limited space and overcrowded areas, our objective must be to ensure protection to patients, the healthcare team and the dialysis ward [15].
So you have to periodically check your own patients but also colleagues and workers to avoid spreading of infection and keep them in quarantine or give them adequate protection (washing the hand, do not touch mouth, eyes or nose with hands, keep on masks).
There is no specific antiviral treatment recommended for COVID-19, and no vaccine is currently available on humans [16]. The treatment is symptomatic, and oxygen therapy represents the major treatment intervention for patients with severe infection. In Italy, a great investigation led by the "Istituto Nazionale Tumori -Fondazione Pascale di Napoli" is focused on the use of Tolicizumab. It is a humanized IgG1 monoclonal antibody, directed against the IL-6 receptor and commonly used in the treatment of rheumatoid arthritis [3].