In 2019 a newly emerged coronavirus was detected by the Center for disease control (CDC) in China. Nucleic acid sequencing from nose and throat swab samples of patients revealed that it was like severe acute respiratory syndrome coronavirus (SARS-CoV). World Health Organization (WHO) named it coronavirus disease 2019 (COVID-19) and reported more than 100000 positive tests until March 2020 for COVID-19. During the past 20 years, the world has been affected by three coronavirus epidemics, SARS-COV, Middle East respiratory syndrome coronavirus (MERS-CoV), and COVID-19 that make world attention. The mortality rate of COVID-19 was more than other coronaviruses, but because of more people affected by it, it seems that it has a less fatality rate compared with MERS-CoV. Initial data showed that more than 80% of patients did not have any symptoms or may had light symptoms. 15% showed severe pneumonia, 5% became critically ill, and developed multiorgan dysfunction and septic shock. Due to the epidemic of emerging viruses and the lack of information about it, this study aimed to provide a quick overview of the most recent studies in the world. To perform this review, keywords such as COVID-19, severe acute respiratory syndrome coronavirus 2, and Angiotensin-converting enzyme 2 were retrieved using the medical subject headings (MeSH) system and then searched in English in PubMed, Scopus, Google Scholar, and Web of Science databases. COVID-19 virus enters its genome into the cells by binding to Angiotensin-converting enzyme 2 in some organs such as the lungs. Although the transmission route is unclear, it enters the body through respiratory droplets. The clinical symptoms includ fever, cough, dyspnea, myalgia, confusion, headache, sore throat, rhinorrhea, chest pain, diarrhea, nausea, vomiting, malaise, and convulsion. The standard diagnostic method is Real-time polymerase chain reaction (RT-PCR), but due to the time-consuming and sensitivity and the existing errors in this technique, chest CT and hematologic data are preferred. No definitive cure for the virus has been suggested so far, but antiviral drugs such as Oseltamivir, Ganciclovir, Lopinavir, Ritonavir and Remdesivir, and the anti-malarial drug Chloroquine phosphate and Interferon are in use until the discovery of the vaccine.

Visceral leishmaniasis (VL) or kala-azar is an important infectious disease which is caused by an intracellular protozoan belonged to Leishmania donovani complex. Leishmania infantum is the main agent of VL in Mediterranean regions such as Iran and Leishmania tropica is second etiological agent as well. Dog and canidae family considered as main reservoirs and different species of sandflies such as phlebotomous major is the main vector for VL in Iran. Currently, VL is endemic in five provinces of the country including Ardabil, East Azerbaijan, Fars, Bushehr and Qom provinces. Moreover, sporadic cases are reported from other provinces. If left untreated it can be fatal, with up to 98% mortality rate, especially in children. As a whole, we believed that the VL is as a Neglected disease in some provinces of Iran such as Mazandaran province. In this paper, we mention regarding history of VL in Mazandaran province, additionally review the current status of VL in Iran and also some efficient and possible factors on reemerging of the VL in Mazandaran province.

Fahr’s disease is a progressive and idiopathic basal ganglia calcification with normal metabolism of calcium and phosphore with motor and psychiatric sings and symptoms. Dementi, chorea attetosise, psychosis and depression due to Fahr’s disease are frequently reported, but Fahr’s disease with bipolar mood disorder manifestation is very rare and we found only 3 cases in review of literature from 1995 to 2005. In this case report, a 21-years old girl is presented who was admitted to Sari-Zare psychiatric hospital for aggression, restlessness and insomnia. After mental status examination and paraclinical investigation, bipolar mood disorder due to Fahr’s disease was detected. To date no specific treatment was found for this disease. This point is important that the patients with Fahr’s disease are sensitive to neuroleptic malignant syndrome.