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The present study involves the aqueous extraction of dyes, optimization of dyeing conditions (Extract concentration and dyeing temperature), application of extracted dyes onto cotton fabrics using optimized conditions, SEM analysis of treated fabrics, assessment of their antibacterial activity, and wash durability. Using Central Composite Design (CCD), the optimized dyeing conditions were selected as 39.14 percent and 700C based on the lowest bacterial count demonstrated by the dyed cotton fabric samples. Results of Analysis of Variance (ANOVA) confirmed that extract concentration has a more significant statistical influence compared to dyeing temperature. Treated cotton fabrics at optimized conditions together with alum as a cross-linking agent exhibited a 98.54 and 97.96 percent reduction in the bacterial count against Staphylococcus Aureus and Pseudomonas Aeruginosa bacterial strains respectively. The retention of the antimicrobial activity of treated fabrics was found to be more significant even after 5 washes thus confirming that Galinsoga Parviflora extract is a potential source of finishes capable of improving antibacterial resistance of cotton fabrics for a longer period.

Background: Audit of Surgical mortality seeks to focus on improvement in the process of surgical care and not on individual surgical ability. Audit of surgical mortality was conducted to establish the factors associated with the surgical deaths in Virika Hospital to propose ways of improvement. Methods: The study was conducted in Virika Mission Hospital in Western Uganda, a 155 bed capacity hospital with a surgical bed capacity of 32 located in rural Uganda. Individual case file review of the fourty three surgical deaths from 1st July 2008 to 31st June 2009 was conducted. Additional data was retrieved from hospital admission register, operation registers, and death certificate books. Results: The operation death rate was 1.3%, all were emergencies, and 82.6% were done under general anaesthesia and 17.4% died on table. The laparotomy death rate was 12.5%, Herniorrhaphy 0.9%, drainage of pus 1.4% and wound suture 0.4%. Surgery was delayed due to lack of blood in only one case but there was no record of lack of any resource for delaying surgery. Surgical conditions were: Injuries 39.5%, Intestinal perforations 30.2%, Intestinal obstruction 20.9% and others 9.3%. The hospital had no high dependency unit and no intensive care unit. No postmortem was conducted in all cases. Conclusion: Overall the Audit identified client, provider, administrative and community-related factors that need to be addressed collectively to reduce surgical mortality in Virika hospital. Audit of surgical mortality should be part of the health workers' general approach to making more information available in a meaningful way for continuous improvement of surgical services. [ABSTRACT FROM AUTHOR]

Ileo-sigmoid knotting (ISK) refers to the intertwining of the ileum and the sigmoid colon. The incidence of ISK is not known but generally occurs in areas with high incidence of sigmoid volvulus such as Africa, Asia, Middle East, and South America. ISK is more common in adult males, particularly the old. ISK in pregnancy is not common but if it occurs, early surgical intervention is necessary to avert its associated morbidity and mortality. Normal pregnancy complaints may cloud the clinical picture of ISK and efforts to avoid radiological investigations may contribute to diagnostic delay. We report a case of a pregnant mother in her second trimester who was admitted at Mbarara Regional Referral Hospital with features of intestinal obstruction and exploratory laparotomy revealed ISK with gangrenous bowel. After surgery, she recovered very well, carried her pregnancy to term and delivered normally. [ABSTRACT FROM AUTHOR]

Background: Non-traumatic small bowel perforation (SBP) is the most common form of gastrointestinal perforation in sub-Saharan Africa. Although SBP is a surgical emergency associated with complications, information regarding its aetiology is scanty in Uganda. This study was aimed at determining the aetiology and document treatment outcomes of non-traumatic small bowel perforations in South-western Uganda. Methods: This was a descriptive case series of 87 consenting patients with non-traumatic SBP confirmed at laparotomy, on the emergency ward of Mbarara University Teaching Hospital. They were enrolled from September 2011 to May 2012. Specimens for blood culture, stool microscopy, HIV testing and tissue biopsies at the site of perforation were collected and analyzed. Patient follow-up was done till discharge. Results: Of the 78 biopsies performed, 66(84.6%) had histological features suggestive of typhoid perforations while 12(15.4%) had features of non-specific inflammation. Salmonella typhi was isolated in 13(15.0%) out of the 87 patients. Isolates were susceptible to Ceftriaxone and Ciprofloxacin. All patients tested HIV negative. Ascaris lumbricoides were seen in two patients. Re-laparotomy was done in four patients with new perforations, two with anastomotic breakdown and two with intra-abdominal abscesses. Wound sepsis was observed in 25(28.7%). Average length of hospital stay was 13 days. Some 10(11.5%) patients died. Conclusions: Most cases of non-traumatic SBP in south western Uganda are associated with Salmonella infection. There is need to enhance laboratory capacity to detect typhoid and preventive measures should be instituted in the general population. [ABSTRACT FROM AUTHOR]

Objectives: Natural killer (NK) cells make important contributions to anti-malarial immunity through antibody-dependent cellular cytotoxicity (ADCC), but the role of different components of this pathway in promoting NK cell activation remains unclear., Methods: We compared the functions and phenotypes of NK cells from malaria-exposed and malaria-naive donors, and then varied the erythrocyte genetic background, Plasmodium falciparum strain and opsonising plasma used in ADCC to observe their impacts on NK cell degranulation as measured by CD107a mobilisation., Results: Natural killer cells from malaria-exposed adult Ugandan donors had enhanced ADCC, but an impaired pro-inflammatory response to cytokine stimulation, compared to NK cells obtained from malaria-naive adult North American donors. Cellular phenotypes from malaria-exposed donors reflected this specialisation for ADCC, with a compartment-wide downregulation of the Fc receptor γ-chain and enrichment of highly differentiated CD56 dim and CD56 neg populations. NK cell degranulation was enhanced in response to opsonised P. falciparum schizonts cultured in sickle cell heterozygous erythrocytes relative to wild-type erythrocytes, and when using opsonising plasma collected from donors living in a high transmission area compared to a lower transmission area despite similar levels of 3D7 schizont-specific IgG levels. However, degranulation was lowered in response to opsonised field isolate P. falciparum schizonts isolated from clinical malaria infections, compared to the 3D7 laboratory strain typically used in these assays., Conclusion: This work highlights important host and parasite factors that contribute to ADCC efficacy that should be considered in the design of ADCC assays., Competing Interests: The authors declare no conflict of interest., (© 2024 The Author(s). Clinical & Translational Immunology published by John Wiley & Sons Australia, Ltd on behalf of Australian and New Zealand Society for Immunology, Inc.)

Traditionally considered a disease common in the older population, colorectal cancer is increasing in incidence among younger demographics. Evidence suggests that populational- and generational-level shifts in the composition of the human gut microbiome may be tied to the recent trends in gastrointestinal carcinogenesis. This review provides an overview of current research and putative mechanisms behind the rising incidence of colorectal cancer in the younger population, with insight into future interventions that may prevent or reverse the rate of early-onset colorectal carcinoma.

The incidence of left-sided colon and rectal cancer in young people are increasing worldwide, but its causes are poorly understood. It is not clear if the tumor microenvironment is dependent on age of onset, and little is known about the composition of tumor-infiltrating T cells in early-onset colorectal cancer (EOCRC). To address this, we investigated T-cell subsets and performed gene expression immune profiling in sporadic EOCRC tumors and matched average-onset colorectal cancer (AOCRC) tumors. Left-sided colon and rectal tumors from 40 cases were analyzed; 20 EOCRC (<45 years) patients were matched 1:1 to AOCRC (70-75 years) patients by gender, tumor location, and stage. Cases with germline pathogenic variants, inflammatory bowel disease or neoadjuvant-treated tumors were excluded. For T cells in tumors and stroma, a multiplex immunofluorescence assay combined with digital image analysis and machine learning algorithms was used. Immunological mediators in the tumor microenvironment were assessed by NanoString gene expression profiling of mRNA. Immunofluorescence revealed no significant difference between EOCRC and AOCRC with regard to infiltration of total T cells, conventional CD4 + and CD8 + T cells, regulatory T cells, or γδ T cells. Most T cells were located in the stroma in both EOCRC and AOCRC. Immune profiling by gene expression revealed higher expression in AOCRC of the immunoregulatory cytokine IL-10, the inhibitory NK cell receptors KIR3DL3 and KLRB1 (CD161), and IFN-a7 (IFNA7). In contrast, the interferon-induced gene IFIT2 was more highly expressed in EOCRC. However, in a global analysis of 770 tumor immunity genes, no significant differences could be detected. T-cell infiltration and expression of inflammatory mediators are similar in EOCRC and AOCRC. This may indicate that the immune response to cancer in left colon and rectum is not related to age of onset and that EOCRC is likely not driven by immune response deficiency.

Medical photography is a specialized genre of photography concerned with taking photographs beneficial to medical practice. This study aimed at delineating trends in medical photography practices among graduate students at Makerere University in Kampala, Uganda. Data suggest most graduate students first encounter medical photographs in their classes (68.1%), although some had taken their own medical photographs (13.5%), primarily using their mobile phone (81.6%). However, the majority of the photographs (66%) were taken by their colleagues.

Background: Dental arch dimensions are useful in dental practice and in forensic odontology. Local data is essential because ethnic differences exist in dental arch dimensions. In the Ugandan population no studies had been done on dental arch dimensions. The objective of the current study was to determine the variations in dental arch dimensions with age and gender in a sample of dental casts from the Ugandan population., Method: This was a secondary analysis of dental casts previously prepared using mandibular and maxillary arch impressions of 220 children (85 boys and 135 girls) aged 12-17 years recruited from schools in Kampala, Uganda. Dental arch dimensions for the maxilla and mandibular casts were taken using a digital vernier calliper. The data was analysed using the means based independent samples t test to obtain the descriptive statistics with regression analysis being used to obtain the regression coefficients and constants using STATA 12., Results: The overall maxillary dimensions were significantly smaller in females than males by 1.50 mm (95% CI -2.91 to -0.09, P = 0.04), controlling for age group. The overall dimensions of the mandible were also smaller in younger participants, though this was not statistically significant., Conclusion: From this study we observed significant differences in arch dimensions between males and females that are of forensic value for this population. There is need for more study of the differences in arch dimensions with age using a larger and more age diverse study population.