1.Empirical study of input, output, outcome and impact of community-based rehabilitation stations
Xiayao CHEN ; Ying DONG ; Xue DONG ; Zhongxiang MI ; Jun CHENG ; Aimin ZHANG ; Didi LU ; Jun WANG ; Jude LIU ; Qianmo AN ; Hui GUO ; Xiaochen LIU ; Zefeng YU
Chinese Journal of Rehabilitation Theory and Practice 2026;32(1):83-89
ObjectiveTo investigate the present situation of input, output, outcome and impact of all registered community-based rehabilitation stations in Inner Mongolia in China, and analyze how the input predict the output, outcome and impact. MethodsFrom March 1st to April 30th, 2025, a questionnaire survey was conducted on all registered community-based rehabilitation stations in Inner Mongolia, covering four dimensions: input, output, outcome and impact. A total of 1 365 questionnaires were distributed. The input included four items: laws and policies, human resources, equipment and facilities, and rehabilitation information management. The output included two items: technical paths and benefits/effectiveness. The outcome included three items: coverage rates, rehabilitation interventions and functional results. The impact included two items: health and sustainability. Each item contained several questions, all of which were described in a positive way. Each question was scored from one to five. A lower score indicated that the situation of the community-based rehabilitation station was more in line with the content described in the question. Regression analysis was performed using the total score of each item of input dimension as independent variables, and the total scores of the output, outcome and impact dimensions as dependent variables. ResultsA total of 1 262 valid questionnaires were collected. The mean values of input, output, outcome and impact of community-based rehabilitation stations were 1.827 to 1.904, with coefficient of variation of 45.892% to 49.239%. The regression analysis showed that, rehabilitation information management, human resources, and laws and policies significantly predicted the output dimension (R² = 0.910, P < 0.001). Meanwhile, all four items in the input dimension predicted both the outcome (R² = 0.850, P < 0.001) and impact dimensions (R² = 0.833, P < 0.001). ConclusionInput, output, outcome and impact of the community-based rehabilitation stations in Inner Mongolia were generally in line with the content of the questions, although some imbalances were observed. Additionally, the input of community-based rehabilitation stations could significantly predict their output, outcome and impact.
2.Histone Modification with Traditional Chinese Medicine in Prevention and Treatment of Atherosclerosis: A Review
Zhichao CHEN ; He GUO ; Ying YANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):318-327
Atherosclerosis (AS) is the main pathological basis of cardiovascular diseases, and its occurrence and development are closely related to epigenetic regulation. Histone modification, as the core mechanism of epigenetic regulation, plays a crucial role in the occurrence and development of AS by dynamically regulating chromatin structure and gene expression. In recent years, traditional Chinese medicine (TCM) and its active components have shown unique advantages and potential in regulating histone modification for the prevention and treatment of AS. This article systematically reviews the mechanisms of histone acetylation, methylation, lactylation, etc. in the pathological process of AS and summarizes the latest research progress in the intervention of AS by the active components and compound prescriptions of TCM through regulating histone modification. Studies have indicated that TCM and its compound prescriptions regulate the activities of histone modification enzymes via multiple targets, showing unique advantages in influencing lipid metabolism and inflammatory response, as well as stabilizing vulnerable plaques and endothelial function. The active components of TCM directly target the activities or expression of histone modification enzymes such as histone acetyltransferases (HATs), histone deacetylases (HDACs), histone lysine methyltransferases (KMTs), and histone lysine demethylases (KDMs), thereby causing changes in histone modification and ultimately affecting gene expression and pathological phenotype in AS. However, current research still has problems such as insufficient in-depth basic research, unclear intervention effects and mechanisms of AS dynamics, relatively isolated studies on various factors of epigenetic modification, and unclear establishment of quality control standards for TCM compound prescriptions based on epigenetic regulation. In the future, in-depth research is still needed, and the research results should be translated into clinical applications. This article systematically clarifies the key role and mechanism of TCM in regulating the pathological process of AS through epigenetic intervention, providing new ideas for the modernization of TCM and precise prevention and treatment of AS.
3.Histone Modification with Traditional Chinese Medicine in Prevention and Treatment of Atherosclerosis: A Review
Zhichao CHEN ; He GUO ; Ying YANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):318-327
Atherosclerosis (AS) is the main pathological basis of cardiovascular diseases, and its occurrence and development are closely related to epigenetic regulation. Histone modification, as the core mechanism of epigenetic regulation, plays a crucial role in the occurrence and development of AS by dynamically regulating chromatin structure and gene expression. In recent years, traditional Chinese medicine (TCM) and its active components have shown unique advantages and potential in regulating histone modification for the prevention and treatment of AS. This article systematically reviews the mechanisms of histone acetylation, methylation, lactylation, etc. in the pathological process of AS and summarizes the latest research progress in the intervention of AS by the active components and compound prescriptions of TCM through regulating histone modification. Studies have indicated that TCM and its compound prescriptions regulate the activities of histone modification enzymes via multiple targets, showing unique advantages in influencing lipid metabolism and inflammatory response, as well as stabilizing vulnerable plaques and endothelial function. The active components of TCM directly target the activities or expression of histone modification enzymes such as histone acetyltransferases (HATs), histone deacetylases (HDACs), histone lysine methyltransferases (KMTs), and histone lysine demethylases (KDMs), thereby causing changes in histone modification and ultimately affecting gene expression and pathological phenotype in AS. However, current research still has problems such as insufficient in-depth basic research, unclear intervention effects and mechanisms of AS dynamics, relatively isolated studies on various factors of epigenetic modification, and unclear establishment of quality control standards for TCM compound prescriptions based on epigenetic regulation. In the future, in-depth research is still needed, and the research results should be translated into clinical applications. This article systematically clarifies the key role and mechanism of TCM in regulating the pathological process of AS through epigenetic intervention, providing new ideas for the modernization of TCM and precise prevention and treatment of AS.
4.Effects of Modified Buyang Huanwu Tang on Mice with Cerebral Ischemia-reperfusion Injury by Regulating PINK1/Parkin Signaling Pathway-mediated Mitochondrial Autophagy
Li GUO ; Hengwen CHEN ; Cun ZHAN ; Zhenzhen YING ; Zuomin WU ; Shaoju JIN ; Shangmei CAO ; Shengming HUANG ; Jin WANG ; Xiaotao YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(11):34-43
ObjectiveTo investigate the effects of modified Buyang Huanwu Tang on cerebral ischemia-reperfusion injury (CI/RI) in mice via the PTEN-induced putative kinase 1/E3 ubiquitin ligase (PINK1/Parkin) signaling pathway-mediated mitophagy, and to explore the underlying mechanism by which modified Buyang Huanwu Tang improves CI/RI. MethodsSeventy-two male C57BL/6J mice were randomly divided into six groups (n = 12 per group): Sham-operated group, middle cerebral artery occlusion/reperfusion (MCAO/R) model group, low-, medium-, and high-dose modified Buyang Huanwu Tang groups (8.84, 17.68, 35.36 g·kg-1·d-1), and an aspirin group (13.00 mg·kg-1·d-1). Neurological deficit scores were assessed using the Zea-Longa method. Cerebral infarct volume ratio was measured by 2,3,5-triphenyltetrazolium chloride (TTC) staining. Histopathological changes and neuronal injury in brain tissues were observed using hematoxylin-eosin (HE) staining and Nissl staining. Apoptosis was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay. Mitochondrial ultrastructure in brain tissue was observed by transmission electron microscopy (TEM). Serum levels of superoxide dismutase (SOD) and malondialdehyde (MDA) were determined by enzyme-linked immunosorbent assay (ELISA). The mRNA and protein expression levels of PINK1, Parkin, microtubule-associated protein 1 light chain 3B (LC3B, LC3Ⅱ/Ⅰ), and p62 in brain tissues were detected by real-time quantitative reverse transcription PCR (Real-time PCR) and Western blot, respectively. ResultsCompared with the sham-operated group, the MCAO/R model group showed significantly increased neurological deficit scores and cerebral infarct volume ratios (P<0.01). Severe cortical injury on the infarct side was observed, characterized by decreased neuronal density, cytoplasmic vacuolation, nuclear pyknosis, a marked reduction in Nissl bodies, dissolution of Nissl bodies in the cytoplasm of some pyramidal neurons, and blurred cellular boundaries. The number of TUNEL-positive cells increased significantly (P<0.01). Mitochondria exhibited cristae membrane rupture and matrix vacuolation, with rupture of the outer mitochondrial membrane and formation of autophagosomes, the number of which increased significantly. Serum SOD activity decreased significantly (P<0.01), while MDA content increased significantly (P<0.01). In infarcted brain tissues of model mice, the relative mRNA expression and protein levels of PINK1, Parkin and LC3B were significantly increased (P<0.05, P<0.01), whereas p62 mRNA and protein expression were significantly decreased (P<0.05, P<0.01), showing statistical significance. Compared with the model group, all treatment groups showed significantly decreased neurological deficit scores and cerebral infarct volume ratios (P<0.01). Neuronal density increased significantly, cytoplasmic vacuolation was alleviated, nuclear morphology tended to be more regular and clearer, Nissl body density increased significantly with reduced dissolution and improved contour clarity. The mitochondrial cristae structure was partially restored, with some mitochondria showing autophagosome encapsulation, and the degree of mitochondrial damage was alleviated. Serum SOD activity increased significantly (P<0.01), while MDA content decreased significantly. The mRNA and protein expression levels of PINK1, Parkin, and LC3Ⅱ/Ⅰ were significantly increased (P<0.05, P<0.01), while p62 mRNA and protein expression in the low- and medium-dose modified Buyang Huanwu Tang groups were significantly decreased (P<0.05, P<0.01), showing statistical significance. ConclusionModified Buyang Huanwu Tang can upregulate the protein expression levels of PINK1, Parkin, and LC3Ⅱ/Ⅰ and downregulate p62 protein expression, suggesting that it may improve CI/RI by regulating the expression of proteins related to the PINK1/Parkin signaling pathway. Regulation of the mitophagy pathway may be one of the mechanisms by which modified Buyang Huanwu Tang alleviates CI/RI in mice.
5.Pathogenesis Evolution of Atherosclerosis Induced by Novel Turbid-toxin Microplastics from Perspective of "Body Fluids and Blood Stasis Mixing"
He GUO ; Ying YANG ; Yi ZHENG ; Zhichao CHEN ; Huan ZHANG ; Ying ZHANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(13):253-260
From the theoretical perspective of "body fluids and blood stasis mixing", environmental microplastics (MPs) are conceptualized as a "novel turbid-toxin". This study aims to elucidate the complete pathogenic pathway through which MPs act as a key driving force (the "crucible" of pathogenesis) in the initiation and progression of atherosclerosis (AS). By tracing the classical theories in the Chapter The Occurrence of All Diseases of Miraculous Pivot (Ling Shu), this paper clarifies the core connotations of "body fluids"-it not only refers to endogenous pathological fluids and lipid turbidity but also provides a theoretical basis for incorporating "exogenous turbid fluids", thereby laying a logical foundation for conceptualizing MPs as a "novel turbid-toxin". Meanwhile, the implications of "blood" (encompassing both blood quality abnormalities and blood stasis) and the dynamic process of "mixing" are elucidated. Drawing upon modern toxicological evidence, this paper demonstrates the high homology between MPs and "exogenous turbid-fluids" from three aspects: Morphology, toxicity, and invasion routes. The micro/nano-scale particle morphology of MPs enables mobility within the bloodstream. The multiple exposure pathways of MPs correspond to the traditional Chinese medicine understanding of pathogens invading through the mouth, nose, and skin. The characteristics of accumulating in vivo while inducing oxidative stress and inflammatory responses of MPs fully embody the pathogenic features-adhesion, binding, and vessel damage-of "turbid-toxin". On this basis, the dynamic pathogenesis of MP-induced AS is systematically interpreted. Initially, MPs with the "turbid-toxin" nature impair nutrient-defense harmony and cause endothelial dysfunction. Subsequently, as the core of "mixing", they interact with blood lipids and immune cells, generating heat and phlegm to form a major pathological hub of chronic inflammation. Ultimately, this process drives the coalescence of phlegm, stasis, and turbid-toxin into tangible plaques, evolving from stable lesions to vulnerable masses and accumulations. By integrating classical pathogenic model with contemporary environmental medicine, this study establishes an analytical framework that bridges macro-theory and micro-mechanisms for understanding the cardiovascular risks of MPs through an integrative Chinese-Western medicine lens.
6.Discussion on processing time for Polygonatum kingianum based on analysis of correlation between sugar components and color changes
GUO Hong ; YAO Rui ; LI Zhe ; FAN Jing ; WANG Ying ; GUO Xiaohan ; CHEN Jia ; DUAN Baozhong ; YANG Jianbo ; JING Wenguang ; CHENG Xianlong ; WEI Feng
Drug Standards of China 2026;27(1):0083-0091
Objective: To investigate the correlation between color parameters (L*, a*, b*, Eab*) and the contents of reducing sugars, total polysaccharides, total oligosaccharides, as well as four saccharides (fructose, glucose, sucrose, and kestose) during the nine cycles of steaming and sun-drying processing of Polygonatum kingianum, and to preliminarily explore the optimal processing duration.
Methods: The color changes were objectively evaluated using a colorimeter. The anthrone-sulfuric acid method was employed to determine total polysaccharides and oligosaccharides. The 3,5-dinitrosalicylic acid (DNS) colorimetric method was used to measure total reducing sugar content. High-performance liquid chromatography coupled with charged aerosol detection (HPLC-CAD) was applied for quantitative analysis of fructose, glucose, sucrose, and kestose. Multivariate statistical analysis was conducted to assess samples from different processing stages.
Results: Significant variations in color and component contents were observed across processing stages. The herbal pieces progressively darkened with increased processing cycles: brightness (L*) and total color difference (Eab*) initially decreased then stabilized, while a* (red-green) and b* (yellow-blue) values first increased then declined. Total polysaccharides and oligosaccharides showed overall decreasing trends, whereas reducing sugars initially increased before stabilizing. Fructose and glucose levels rose continuously, while sucrose and kestose decreased progressively, becoming undetectable after five cycles.
Conclusion: The chromatic alteration and saccharide composition of P. kingianum showed significant correlation with processing duration. Both total color difference (Eab*) and reducing sugar content stabilized after four processing cycles (12 hours), suggesting that four cycles of steaming and sun-drying may represent the optimal processing duration.
7.Harnessing Machine Learning for Personalized Care of Patients With Idiopathic Sudden Sensorineural Hearing Loss: A Multicenter Cohort Study
Yen-Ting GUO ; Ching-Ting TAN ; Chen-Chi WU ; Chun-Ying WANG ; Chein-Yu HUANG ; Tzu-Hsiang YANG ; Ting-Yi LEE ; Ting-Hua YANG ; Tien-Chen LIU ; Pey-Yu CHEN ; Pei-Hsuan LIN
Clinical and Experimental Otorhinolaryngology 2026;19(2):194-204
Objectives:
. Idiopathic sudden sensorineural hearing loss (ISSNHL) is a significant cause of hearing loss. Intratympanic steroid injection (ITSI) is commonly used as an initial or salvage treatment; however, the lack of a standardized treatment protocol has resulted in variability in clinical practice. In addition, no efficient prediction model currently exists to support personalized management. Therefore, this study aimed to develop tailored management strategies for ISSNHL using a machine-learning model.
Methods:
. This retrospective multicenter cohort study was conducted between January 2015 and December 2020, with data analysis performed between January 2021 and March 2024. Patients were selected based on the International Classification of Diseases, 10th Revision criteria for ISSNHL, along with relevant medication and procedure codes. Patients with pure-tone audiogram results not meeting ISSNHL criteria, better initial hearing in the affected ear, an identifiable etiology, no post-treatment audiogram, or delayed treatment (>6 weeks) were excluded. We included 770 patients diagnosed with ISSNHL who received ITSI. The primary outcome was the area under the receiver operating characteristic curve for prediction performance. Recovery status was determined using the last pure-tone audiogram. Modeling was conducted on the Quanta for Medical Care AI platform using five machine-learning algorithms and a nested cross-validation framework, in which feature selection and hyperparameter tuning were performed in the inner folds and model performance was evaluated in the outer folds.
Results:
. A random forest classifier outperformed the other models in predicting hearing outcomes, achieving an area under the receiver operating characteristic curve of 0.788. Time to ITSI was the most influential treatment-related factor, with ITSI administered within 10 days of hearing loss being associated with better outcomes. This model can be used to provide personalized prognostic estimates under different treatment protocols.
Conclusion
. The machine-learning-based prediction model facilitates personalized treatment strategies and timely treatment adjustments for ISSNHL, thereby optimizing the likelihood of complete recovery.
8.Effect of Yiqi Yangyin Huoxue Formula(益气养阴活血方)on Oxidative Stress and Inflammatory Injury in Membranous Nephropathy Model Rats:Based on the NOX4-mediated SDF-1α/CXCR4 Signaling Pathway
Xiaoxiao GUO ; Chundong SONG ; Hanhan ZHANG ; Ke SONG ; Chenchen CHEN ; Haoran JIANG ; Ying DING
Journal of Traditional Chinese Medicine 2026;67(13):1431-1439
ObjectiveTo investigate the potential mechanism of Yiqi Yangyin Huoxue Formula (益气养阴活血方, YYHF) in the treatment of membranous nephropathy (MN) based on the NOX4-mediated stromal cell-derived factor-1α(SDF-1α)/CXC chemokine receptor 4 (CXCR4) signaling pathway. MethodsA total of 42 male SD rats were randomly divided into blank group (n=6) and modeling group (n=36). The modeling rats were given a single injection of sheep antirat Fx1A (6 ml/kg) serum into the tail vein to establish MN model. Thirty-six rats with successful modeling were further divided into model group (normal saline, 10 ml/kg), benazepril group (10 mg·kg-1·d-1), the medium-dose YYHF group (11.0 g·kg-1·d-1) and high-dose YYHF group (22.0 g·kg-1·d-1), with 9 rats in each group. All groups received daily intragastric administration for 6 consecutive weeks. During the experimental period, the general condition of rats in each group was observed. After gavage administration finished, a fully automated biochemical analyzer was used to measure the 24-hour urine total protein (24 h-UTP) and serum biochemical parameters, including albumin (ALB), aspartate aminotransferase (AST), blood urea nitrogen (BUN), serum creatinine (SCr), total cholesterol (TC), and triglyceride (TG). Hematoxylin-eosin (HE) staining and periodic acid-silver metheramine (PASM) staining were used to observe the histopathological changes of renal tissues in each group of rats. The levels of superoxide dismutase (SOD) and malondialdehyde (MDA) in renal tissues were detected by ELISA. The protein expression levels of NOX4, SDF-1α, CXCR4, Nrf2, nuclear factor kappa B subunit p65 (NF-κB p65) and podocyte slit diaphragm protein nephrin in rat renal tissues were detected by Western Blotting. The mRNA expressions of NOX4, SDF-1α, CXCR4, Nrf2, NF-κB p65 and Nephrin in renal tissues were detected by real-time fluorescence quantitative polymerase chain reaction (RT-PCR). ResultsCompared to the blank group, rats in the model group exhibited typical features of MN, including lethargy, reduced activity, dull and coarse fur, marked edema, and massive proteinuria. Compared to the model group, these abnormal conditions were improved to varying degrees in all treatment groups. The high-dose YYHF group showed a level of improvement comparable to that of the benazepril group, with overall recovery superior to that of the medium-dose YYHF group. Compared to the blank group, the model group showed increased levels of 24 h-UTP, BUN, SCr, TC and TG, decreased level of ALB, increased levels of MDA and protein and mRNA expressions of NOX4, SDF-1α, CXCR4 and NF-κB p65 in renal tissue, along with decreased levels of SOD and protein and mRNA expressions of Nrf2, Nephrin (P<0.01), accompanied by severe renal pathological damage. Compared to the model group, the benazepril and the medium- and high-dose YYHF groups showed significant improvements in the above indicators (P<0.01), along with alleviation of renal pathological injury. The 24 h-UTP level in the high-dose YYHF group was lower than that in the medium-dose group (P<0.01), while no statistically significant difference was observed among the other treatment groups (P>0.01). ConclusionYYHF may alleviate oxidative stress and inflammatory responses by down-regulating the expression of NOX4 and inhibiting the SDF-1α/CXCR4-Nrf2 signaling pathway, thereby improving podocyte damage and protecting renal function.
9.The Mesencephalic Locomotor Region for Locomotion Control
Xing-Chen GUO ; Yan XIE ; Xin-Shuo WEI ; Wen-Fen LI ; Ying-Yu SUN
Progress in Biochemistry and Biophysics 2025;52(7):1804-1816
Locomotion, a fundamental motor function encompassing various forms such as swimming, walking, running, and flying, is essential for animal survival and adaptation. The mesencephalic locomotor region (MLR), located at the midbrain-hindbrain junction, is a conserved brain area critical for controlling locomotion. This review highlights recent advances in understanding the MLR’s structure and function across species, from lampreys to mammals and birds, with a particular focus on insights gained from optogenetic studies in mammals. The goal is to uncover universal strategies for MLR-mediated locomotor control. Electrical stimulation of the MLR in species such as lampreys, salamanders, cats, and mice initiates locomotion and modulates speed and patterns. For example, in lampreys, MLR stimulation induces swimming, with increased intensity or frequency enhancing propulsive force. Similarly, in salamanders, graded stimulation transitions locomotor outputs from walking to swimming. Histochemical studies reveal that effective MLR stimulation sites colocalize with cholinergic neurons, suggesting a conserved neurochemical basis for locomotion control. In mammals, the MLR comprises two key nuclei: the cuneiform nucleus (CnF) and the pedunculopontine nucleus (PPN). Both nuclei contain glutamatergic and GABAergic neurons, with the PPN additionally housing cholinergic neurons. Optogenetic studies in mice by selectively activating glutamatergic neurons have demonstrated that the CnF and PPN play distinct roles in motor control: the CnF drives rapid escape behaviors, while the PPN regulates slower, exploratory movements. This functional specialization within the MLR allows animals to adapt their locomotion patterns and speed in response to environmental demands and behavioral objectives. Similar to findings in lampreys, the CnF and PPN in mice transmit motor commands to spinal effector circuits by modulating the activity of brainstem reticular formation neurons. However, they achieve this through distinct reticulospinal pathways, enabling the generation of specific behaviors. Further insights from monosynaptic rabies viral tracing reveal that the CnF and PPN integrate inputs from diverse brain regions to produce context-appropriate behaviors. For instance, glutamatergic neurons in the PPN receive signals from other midbrain structures, the basal ganglia, and medullary nuclei, whereas glutamatergic neurons in the CnF rarely receive inputs from the basal ganglia but instead are strongly influenced by the periaqueductal grey and inferior colliculus within the midbrain. These differential connectivity patterns underscore the specialized roles of the CnF and PPN in motor control, highlighting their unique contributions to coordinating locomotion. Birds exhibit exceptional flight capabilities, yet the avian MLR remains poorly understood. Comparative studies suggest that the pedunculopontine tegmental nucleus (PPTg) in birds is homologous to the mammalian PPN, which contains cholinergic neurons, while the intercollicular nucleus (ICo) or nucleus isthmi pars magnocellularis (ImC) may correspond to the CnF. These findings provide important clues for identifying the avian MLR and elucidating its role in flight control. However, functional validation through targeted experiments is urgently needed to confirm these hypotheses. Optogenetics and other advanced techniques in mice have greatly advanced MLR research, enabling precise manipulation of specific neuronal populations. Future studies should extend these methods to other species, particularly birds, to explore unique locomotor adaptations. Comparative analyses of MLR structure and function across species will deepen our understanding of the conserved and evolved features of motor control, revealing fundamental principles of locomotion regulation throughout evolution. By integrating findings from diverse species, we can uncover how the MLR has been adapted to meet the locomotor demands of different environments, from aquatic to aerial habitats.
10.ANTHELMINTIC EFFICACY OF COMPOUNDED FIPRONIL DROPS AGAINST PARASITIC TICKS IN DOGS
Shi-Jie LI ; Guo-Qing CHEN ; Yang-Ying CHENG ; Yan ZHANG ; Meng-Meng DENG ; Wei JI ; Deng-Long XIE ; Xun SUO
Acta Parasitologica et Medica Entomologica Sinica 2025;32(3):167-173
Objective To evaluate the efficacy of Compound Fipronil Spot-on Solution in repelling canine ticks.Methods A total of 140 dogs infested with ticks were randomly selected from regions in southern and northern China and assigned to four groups:southern test drug group,southern control drug group,northern test drug group,and northern control drug group.Each group comprised 35 dogs.Each dog was administered the prescribed dose.The number of ticks was counted on days 1,7,14,21,and 28 following the administration.The negative conversion and average reduction rates of the tick population were then subjected to statistical analyse.Results The mean efficacy of the test drug was 100%in both the southern and northern cohorts,28 days post-treatment.The control drug showed comparable efficacy,reaching a mean reduction of 100%in both regions by the same time point.No additional clinical manifestations or adverse events were observed across all treated dogs.Conclusions Compound Fipronil Spot-on Solutions effectively treats and prevents ticks in dogs in different regions of China.A single dose remains effective for up to 28 days,thus providing a convenient,effective solution.

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