Cancer remains the most devastating disease and the major cause of mortality worldwide. Although early diagnosis and treatment are the key approach in fighting against cancer, the available conventional diagnostic and therapeutic methods are not efficient. Besides, ineffective cancer cell selectivity and toxicity of traditional chemotherapy remain the most significant challenge. These limitations entail the need for the development of both safe and effective cancer diagnosis and treatment options. Due to its robust application, nanotechnology could be a promising method for in-vivo imaging and detection of cancer cells and cancer biomarkers. Nanotechnology could provide a quick, safe, cost-effective, and efficient method for cancer management. It also provides simultaneous diagnosis and treatment of cancer using nano-theragnostic particles that facilitate early detection and selective destruction of cancer cells. Updated and recent discussions are important for selecting the best cancer diagnosis, treatment, and management options, and new insights on designing effective protocols are utmost important. This review discusses the application of nanotechnology in cancer diagnosis, therapeutics, and theragnosis and provides future perspectives in the field.

Background: Hepatitis B virus is a public health problem in the world. It is a major cause of chronic hepatitis, cirrhosis, and hepatic cellular carcinoma. The presence of a confirmed HBsAg result is indicative of ongoing HBV infection. This study aims to assess the sero-prevalence and associated factors of the hepatitis B virus among pregnant women in North West Ethiopia. Methods and Materials: An institution-based cross-sectional study was conducted at Debre Markos Referral Hospital from January to July 2017. A consecutive 338 pregnant women attending the antenatal clinic were included. A structured questionnaire was used to assess hepatitis B virus infection associated factors and some socio-demographic characteristics. A 5 mL of venous blood was collected from each study participant and plasma was separated and analyzed using a rapid HBsAg kit and further confirmed by double sandwich ELISA. The data were analyzed using SPSS software version 24. Results: The mean age of the study participants was 27 (SD ± 4.75) years. The sero-prevalence of hepatitis B virus in pregnant women was 28 (8.3%). Body tattooing practice (AOR = 4.94 95% CI, 1.87– 13.0), multi-partner sexual intercourse (AOR = 4.48 95% CI, 1.89– 10.5) and family hepatitis B history (AOR = 7.40 95% CI, 2.23– 24.5) were statistically significantly associated with HBV infection (p = 0.001). Conclusion: The prevalence of hepatitis B infection is very high among pregnant women in the study area. Awareness creation on modes of transmission and early screening of all pregnant women attending antenatal care must be strengthened to minimize and control infection.

Background: Streptomycin is used as an epidemiological marker in monitoring programs for antimicrobial resistance in Salmonella serovars and indicates the presence of pentaresistance. However, comprehensive data on streptomycin resistant Salmonella among human, animal, and animal products is lacking in Ethiopia. In this review, we aimed to assess heterogeneity and pooled proportion of Salmonella serovars to streptomycin resistance among human, animal and animal products in Ethiopia. Methods: We conducted a systematic review and meta-analysis of published literature from Ethiopia. We used the MEDLINE/ PubMed, Embase, Cochrane Library, and Google Scholar databases to identify genetic and phenotypic data on Salmonella isolates. To determine the heterogeneity and pooled proportion, we used metaprop commands and the random-effects model. Relative and cumulative frequencies were calculated to describe the overall preponderance of streptomycin resistance isolates after arcsine-transformed data. Metan funnel and meta-bias using a begg test were performed to check for publication bias. Results: Overall, we included 1475 Salmonella serovars in this meta-analysis. The pooled proportion of streptomycin resistance was 47% (95% CI: 35–60%). Sub-group analysis by target population showed that the proportion of streptomycin resistance in Salmonella serovars was 54% (95% CI: 35–73%) in animal, 44% (95% Cl: 33–59%) in humans and 39% (95% CI: 24–55%) in animals products. The streptomycin resistant Salmonella serovars were statistically increasing from 0.35(95% CI: 0.12–0.58) in 2003 to 0.77(95% CI: 0.64–0.89) in 2018. The level of multidrug-resistant (MDR) Salmonella serovars was 50.1% in the meta-analysis. Conclusion: We found a high level of streptomycin resistance, including multidrug, Salmonella serovars among human, animals, and animal products. This resistance was significantly increasing in the last three decades (1985–2018). The resistance to streptomycin among Salmonella serovars isolated from animals was higher than humans. This mandates the continuous monitoring of streptomycin use and practicing one health approach to preventing further development of resistance in Ethiopia. Registration: We conducted a systematic review and meta-analysis after registration of the protocol in PROSPERO (CRD42019135116) following the MOOSE (Meta-Analysis of Observational Studies in Epidemiology).

In Ethiopia individual report indicated nearly 30% of incident cases of tuberculosis remained undiagnosed. Therefore, this systematic review and meta-analysis was aimed to determine the pooled prevalence rate of undiagnosed smear positive pulmonary tuberculosis (PTB) using community based studies published in Ethiopia. MEDLINE/PubMed, ’Cochrane’ library, and Google scholar databases were searched, and reference list of studies on tuberculosis in Ethiopia were reviewed. We used table to present descriptive information of original studies and quantitative results were presented in forest plots. The Cochrane Q test and I2 test statistic were used to test heterogeneity across studies. The Pooled prevalence and point estimates of undiagnosed smear positive PTB were computed by a random effects model. From the nine studies included in the analysis, the pooled prevalence rate and point estimate of undiagnosed smear positive PTB was 0.11%(95% CI, 0.06–013%, p < 0.001) and 79.8/100,000(95% CI; 56.3–112.8) respectively. Pooled prevalence rate and point estimate of bacteriologically confirmed PTB were 0.17%(95%CI; 0.13–0.22%, P < 0.001) and 191/100000(95% CI; 141.3–258) respectively. The ratio of active to passive case detection was 2.3(95% CI, 0.42–4.1). Pooled prevalence rate of presumptive PTB was 2.7%(95% CI; 1.3–5.3%). The analysis revealed that the magnitude of undiagnosed smear positive PTB cases in the community is high in Ethiopia. This indicated the ongoing transmission of tuberculosis in community due to missed infectious cases. Active tuberculosis finding in the community should be strengthened in Ethiopia. 140611 .

Background. Staphylococcus aureus (S. aureus) causes different types of human infections and can develop resistance to many antibiotics. There is a scarcity of data on the mecA gene and multidrug-resistant (MDR) strain distribution of this organism in developing countries, such as Ethiopia. This study investigated the presence of mecA gene and MDR profile of S. aureus among patients attending referral hospitals of Amhara regional state. Methods. Of the total of 110 isolates collected from Amhara regional referral hospitals, 70 MDR isolates were further processed for isolation of S. aureus mecA gene. Genomic DNA was isolated using a Sigma-Aldrich genomic DNA isolation kit for Gram-positive bacteria. Amplification of S. aureus mecA gene was performed with the amplicon size of 533bp. Antimicrobial susceptibility test including methicillin resistance was determined by the KirbyBauer disc diffusion method. Results. The majority of the isolates were recovered from patients aged less than 5years (51; 36.7) and the least number of isolates was recorded in age group greater than 60years (6; 4.3). Most of the isolates were from blood (61; 43.9), followed by wounds (45; 32.4). A high resistance rate was observed in penicillin (81; 73.6), followed by cotrimoxazole (78; 70.9), ceftriaxone (76; 69), erythromycin (66; 60), and tetracycline (65; 59.1). Phenotypically, considering cefoxitin as a surrogate marker, 38 (34.5) of the isolates were methicillin-resistant. The overall MDR isolates were 80 (72.7). The PCR amplification result of the mecA gene was 14 (20). Conclusions and Recommendations. High rates of MDR and methicillin-resistantS. aureus were reported. PCR amplification indicated that 20 of MRSA isolates were the mecA gene carriers. Large-scale studies for the detection of MDR strains of S. aureus including MRSA using molecular techniques should be encouraged in the Amhara region.

Background: Healthcare-associated infections occur in patients under medical care, which is a major public health issue in hospitals worldwide. The prevalence is two to three folds higher in developing countries compared to developed countries. Inanimate objects used by healthcare professionals such as gowns, mobile phones, and stethoscopes are highly prone to bacterial contamination from the healthcare setting. In Ethiopia, there is a paucity of published data on the bacterial profile and susceptibility patterns of an isolates. Objective: To determine the bacterial profile and antimicrobial susceptibility patterns from inanimate objects used by healthcare professionals and associated factors at Debre Markos Comprehensive Specialized Hospital, Northwest Ethiopia. Methods: A cross-sectional study was conducted at Debre Markos Comprehensive Specialized Hospital from inanimate objects from April 10, 2023 to June 30, 2023 using simple random sampling technique with lottery method. Socio-demographic data was collected using a structured questionnaire. A swab sample from healthcare professionals’ gowns, mobile phones, and stethoscopes were collected and inoculated onto blood agar, chocolate and MacConkey agar. Isolates were identified and characterized by colony morphology, Gram staining and biochemical tests. Antimicrobial susceptibility testing was performed in all isolates by the disk diffusion technique on Muller Hinton agar according to CLSI, 2022 guidelines. Data was entered into EPI-Data and analyzed using SPSS version 25. Logistic regression model was used. Variables with p-value ≤ 0.25 in bivariable logistic regression was fitted to multivariate logistic regression analysis. A p-value of ≤ 0.05 with 95%CI was considered statistically significant. Result: A total of 376 healthcare professionals’ inanimate objects were included from 191 study participants. Overall, 60.1% (226/376) (95%CI: 55.1–65) inanimate objects were contaminated. The proportion of bacterial contamination was (65.1%; 82/126), (60.3%; 76/126) and (54.8%; 68/124) for mobile phones, gowns and stethoscopes, respectively. Staphylococcus aureus was the most frequent isolate accounting (22.1%; 83/376) followed by Staphylococcus epidermidis (17.0%; 64/376), Escherichia coli (8.8%; 33/376) and Pseudomonas aeruginosa (4.9%; 18/376). Working in gynecology/ obstetrics wards (AOR: 8.69; 95%CI: 1.09–69.41, P = 0.041), did not disinfect mobile phones (AOR: 2.69; 95%CI: 1.15–6.25; P = 0.021) and stethoscopes regularly (AOR: 3.06, 95%CI: 1.23–7.59; P = 0.016), carry mobile phones with patient care materials (AOR: 2.72; 95%CI: 1.18–6.29, P = 0.019) and not taken infection prevention training (AOR:3.91; 95%CI:1.71–8.93; P = 0.001) were significantly associated with bacterial contamination.Most Gram-negative bacteria were resistant to ampicillin, trimethoprim-sulfamethoxazole and amoxacilline-clavunic acid, while Gram-positive isolates showed high level of resistant to penicillin. On the other hand, meropenem, for Gram-negative and clindamycin for Gram-positive bacteria showed lower level of resistance. Multidrug resistance among Gram-positive and Gram-negative bacteria were (62.6%; 92/147) and (75.3%; 64/85), respectively with over all MDR (67.2%, 156/232). Conclusion: Inanimate objects commonly used by healthcare professionals are important sources of bacterial contamination. S. aureus, S. epidermidis and E. coli were the predominant isolates. Most Gram-negative bacteria were resistant to ampicillin while Gram-positive isolates showed high level of resistant to penicillin. All healthcare professionals should regularly disinfect their inanimate objects to prevent bacterial colonization and potential spread of infection.