Indian Journal of Dental Sciences最新文献

Background objectives: Severe cases with neurological manifestations of rickettsiosis have been reported. We aimed to identify the epidemiological, clinical and laboratory features of central nervous system rickettsial infections and to describe the treatment.

Methods: We carried out a retrospective study that included all patients hospitalized with rickettsiosis in the infectious diseases department of Hedi Chaker University Hospital in Sfax, Tunisia between 1993 and 2018.

Results: We identified 47 patients with central nervous system rickettsial infections among 440 patients with rickettsial infections (10.7%). Skin rash (31.9% vs 87.8%; p<0.001) and eschar (4.2% vs 27.7%; p<0.001) were less frequent among patients with central nervous system rickettsial infections. Complications (6.4% vs 0.5%; p=0.01) and death (4.2% vs 0.3%; p=0.03) were more frequent among patients with central nervous system rickettsial infections.

Interpretation conclusion: Cardinal clinical features and typical laboratory results including thrombocytopenia were less frequent, and prognosis was more severe in patients with central nervous system rickettsial infections.

Background & objectives: Vector-borne diseases are a significant issue for public health worldwide, especially in India. In recent years, high number of dengue and chikungunya cases have been reported from Rajasthan state of India, those are principally transmitted by Aedes aegypti. These vectors are extremely intrusive and can thrive in practically any climate. However, vector mosquitos' prevalence in Jaipur district is not properly documented. Therefore, current research was carried out to ascertain the seasonal fluctuations of Aedes aegypti in Jaipur city, Rajasthan, India.

Methods: In order to ascertain the seasonal variation, monitoring of Aedes mosquitoes was conducted from August 2021 to July 2022 at nine selected regions in the Jaipur city. The breeding capacity of vectors was evaluated using three vector indices: the House Index, Breteau Index, and Container Index.

Results: A total of 2172 out of 6336 breeding sites and 3735 out of 7477 containers were found positive for Aedes species. Three important species of Aedes vectors were collected in which Aedes aegypti was reported as the most prevalent. The highest values for House Index (57.60%) and Container Index (54.95%) were observed in October and the least rate was observed in March.

Interpretation & conclusion: This survey was carried out to investigate the seasonal prevalence of dengue vectors and the findings revealed seasonal fluctuations in the indices of Aedes reproducing potential. This calls for precautionary actions to avoid infection rates and epidemic emergence. Therefore, to stop epidemics and eradicate vector-borne infections, the current study recommends close monitoring and further vector management efforts.

Background & objectives: Vector control measures are important in lowering the spread of infections spread by mosquito. Synthetic pesticides used to suppress vector populations during the larval stage have had adverse impacts on people and the environment. The early III instar larvae of Aedes aegypti and Anopheles stephensi were the targets of the current experiment, which assessed the larvicidal ability of petroleum ether, chloroform, methanol, and aqueous extracts of Annona squamosa leaves.

Methods: Using the standard World Health Organization (WHO) larval bioassay test, leaf extracts were evaluated for their activity against Ae. aegypti and An. stephensi to determine lethal doses. Phytochemical analysis and gas chromatography-mass spectrometry (GC-MS) were carried out to identify larvicidal components in the extract. Further analysis using a scanning electron microscope (SEM) was done to check the extracts toxicity for both mosquito larvae.

Results: The larvicidal active components were identified by GC-MS as tetradecanoic acid, cis-vaccenic acid, and 2,4-di-tert-butylphenol etc. Methanol leaf extracts of A. squamosa (ASME) exhibited strong larvicidal activity against the early 3^rd instar larvae of Ae. aegypti and An. stephensi with Lethal concentration (LC₅₀) values of 51.450 ppm and 107.121 ppm. Cell damages to the larva post exposure to ASME were examined.

Interpretation & conclusion: This finding showed that the ASME has better larvicidal activity and its components that may be used to kill larvae as larvicides. The extracts toxicity towards damage of midgut of larva further suggests that this plant methanol leaf extracts could be effective in larval growth control approaches.

Lyme disease (LD) is caused by a group of tick-borne bacteria of the genus Borrelia termed Lyme disease Borreliae (LDB). The detection of serum antibodies to specific LDB antigens is widely used to support diagnosis of LD. Recent findings highlight a need for serological tests that can differentiate LD from tick-borne relapsing fever (TBRF) caused by a separate group of Borrelia species termed relapsing fever Borreliae. This is because LD and TBRF share some clinical symptoms and can occur in overlapping locations. The development of serological tests for TBRF is at an early stage compared with LD. This article reviews the application of line immunoblots (IBs), where recombinant proteins applied as lines on nitrocellulose membrane strips are used to detect antibodies in patient sera, for the diagnosis and differentiation of LD and TBRF.