Anthrax Attacks Research Articles

Analisis Kestabilan Model Penyebaran Penyakit Antraks pada Populasi Ternak dengan Transmisi Tak Langsung dan Penggunaan Desinfektan

Anthrax is an infectious disease caused by the bacterium Bacillus anthracis. This disease causes a fairly high mortality rate in livestock populations that can threaten food security in a region. Therefore, it is necessary to prevent and control its spread. This study aims to examine the model of the spread of anthrax disease in a livestock population by considering indirect transmission and the use of disinfectants. The constructed model is expressed as a system of ordinary differential equations. Dynamical analysis is carried out to identify the stability properties of the disease-free equilibrium point. The results of the dynamical analysis show that the disease-free equilibrium point is conditionally stable, namely when the basic reproduction number is less than one. In addition, the results of numerical experiments show that the use of disinfectants has a significant effect on the dynamics of the spread of anthrax disease, namely the higher the rate of bacterial death due to disinfectants, the fewer cases of anthrax. This study shows that the use of disinfectants can be an effective strategy to control the spread of anthrax disease in livestock populations.

Evaluation of the Epidemic Situation of Anthrax in Armenia Over the Last Decade.

Anthrax is a World Organisation for Animal Health (WOAH)-listed disease that must be reported upon confirmation based on the Terrestrial Animal Health Code. Anthrax poses a serious health issue for unvaccinated livestock, is a threat to humans through interaction with contaminated livestock and animal products and is endemic in many areas throughout the world, including the Transcaucasian Region. Despite several control and eradication efforts that have been implemented by the government of the Republic of Armenia (RA), sporadic cases of anthrax are still reported. We sought to understand the epidemic situation of anthrax in RA during the last 10 years (2012-2023) based on analysis of outbreaks and reported cases in cattle and humans. We collected and evaluated officially reported data from human and animal cases, such as time, location, animal species, disease intensity and spread radius. The data and various parameters were mapped using ArcGIS to prepare a viable risk assessment. Based on the officially available data and reports, there have been 80 human cases and 55 animal cases of anthrax confirmed in RA from 2012 to 2023. We also identified the presence of anthrax spores in soil and environmental samples near animal burial sites in RA in 2015-2017 through polymerase chain reaction (PCR) testing. Upon comparing the human and animal cases by frequency and intensity, the human cases are directly proportional to the animal husbandry practices performed in RA. The detection of the anthrax pathogen at the burial sites highlights the continued threat in these areas. Thus, it is imperative to secure and monitor any areas that have been used for anthrax burial and limit the movement of animals in these areas. In the future, legislation should be updated to prioritise incineration of anthrax-infected carcasses instead of burial to limit further exposure to animals and humans.

Upper Limb Compartment Syndrome-An Extremely Rare Life-Threatening Complication of Cutaneous Anthrax.

(1) Background: Cutaneous anthrax is a disease caused by a Gram-positive bacillus, spore-forming Bacillus anthracis (BA). Cutaneous anthrax accounts for 95% of all anthrax cases, with mortality between 10-40% in untreated forms. The most feared complication, which can be life-threatening and is rarely encountered and described in the literature, is compartment syndrome. (2) Methods: We report a series of six cases of cutaneous anthrax from the same endemic area. In two of the cases, the disease was complicated by compartment syndrome. The systematic review was conducted according to systematic review guidelines, and the PubMed, Google Scholar, and Web of Science databases were searched for publications from 1 January 2008 to 31 December 2023. The keywords used were: "cutaneous anthrax" and "compartment syndrome by cutaneous anthrax". (3) Results: For compartment syndrome, emergency surgical intervention for decompression was required, along with another three surgeries, with hospitalization between 21 and 23 days. In the systematic review, among the 37 articles, 29 did not contain cases focusing on compartment syndrome of the thoracic limb in cutaneous anthrax. The results were included in a Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) flow diagram. (4) Conclusions: Early recognition of the characteristic cutaneous lesions and compartment syndrome with early initiation of antibiotics and urgent surgical treatment is the lifesaving solution.

Knowledge-attitude and practice of Anthrax and brucellosis: Implications for zoonotic disease surveillance and control in pastoral communities of Afar and Somali region, Ethiopia.

Anthrax and brucellosis are endemic national priority zoonotic diseases in Ethiopia. This study assess the possible factors explaining the current limited information available on animal and human cases in pastoral communities. Two questionnaire surveys gathered data from 509 pastoralists and 51 healthcare providers between February and April 2019 in five districts of Afar and the Somali region (SRS). Among the 51 healthcare providers, 25 (49%) and 38 (74.5%) had heard of brucellosis, and anthrax, respectively. Of those, only 3 (12%) and 14 (36.8%) knew the symptoms of brucellosis and Anthrax. None of the Health Extension Workers knew any disease symptoms. Healthcare providers recalled two human cases of brucellosis and 39 cases of Anthrax in the last 12 months, based on symptom-based diagnosis. Pastoralists had a moderate level of knowledge about diseases in their animals, with over half (52.4%; n = 267/509) understanding that animals can transmit diseases to people. Overall, 280 out of 508 (55.1%) and 333 out of 507 (65.7%) pastoralists had heard of brucellosis and Anthrax, respectively. Among the latter, 282 (51.3%) knew at least one preventive measure for Anthrax. However, disease knowledge among women was poor. Despite their knowledge, pastoralists engaged in risky unprotected animal handling, animal product consumption/usage as well as husbandry behaviors exposing them to pathogens and favoring the spread of diseases. They identified Anthrax as the most important zoonosis (47.6%) and as one of top three diseases suspected to cause mortality in their livestock. Pastoralists highlighted lack of vaccine coverage, availability and their timely administration. Both, pastoralists and healthcare providers stated the lack of disease awareness and the unavailability of drugs in the market as important challenges. Health facilities lacked protocols and standard operating procedures for managing zoonotic diseases, and did not have access to laboratory confirmation of pathogens. Our study revealed significant under-reporting of Anthrax and brucellosis, and weak prevention and response in humans, mostly associated with poor disease knowledge of healthcare providers. Ability to respond to animal outbreaks was limited by vaccine and drugs availability, timely vaccine administration and the mobility of pastoralists.

A case study on anthrax in an eight-month old infant at Kyrgyz Republic.

Anthrax remains a threat, especially in countries like Kyrgyzstan with developed livestock farming. Despite preventive efforts, sporadic outbreaks endure on an annual basis, transmitted from infected animals to humans. Here, we report a severe anthrax case in an 8-month-old child known to be caused when a sick calf was slaughtered in the neighborhood without proper protocols, resulting in intra-family infection. This underscores the importance of swift diagnosis, treatment, preventive measures, and awareness of zoonotic infections, animal vaccination and adherence to sanitary and veterinary protocols.

Large Anthrax Outbreak in a New Locality in Croatia, 2022.

Bacillus anthracis is a well-known zoonotic pathogen that can cause disease in both animals and humans. Moreover, it has a high bioterrorism potential as its lethal spores are resistant to inactivation, are easy to produce in large quantities, and are easily spread over large areas. Anthrax cases occur in different parts of the world, including most European countries. Specific areas of Croatia are long known as anthrax districts, but with sporadically reported cases over the years. Here, we present a major outbreak of animal and human anthrax in the region of Lonjsko Polje in Croatia, a region not known to have anthrax cases in the past. The outbreak started in July 2022 and lasted several months, but most human and animal cases were reported in the first month. During the outbreak, there were 17 reported human cases of cutaneous anthrax and 29 laboratory-confirmed animal cases. However, due to issues in reporting in animals and the late finding of the carcasses, which made laboratory diagnostics challenging, the actual number of animal cases was probably significantly higher.

The second cutaneous anthrax infection diagnosed by metagenomic next-generation sequencing: A case report.

Anthrax is a severe zoonotic infectious disease caused by Bacillus anthracis. Most reported cases were traditionally diagnosed through culture and microscopy. We reported here the second case of cutaneous anthrax diagnosed by metagenomic next-generation sequencing (mNGS). A 63-year-old man had a history of contact with an unwell sheep, developing local redness and swelling on wrist. The dorsal side of the left hand and forearm, with tension blisters on the back of the left. B anthracis was detected from culturing and mNGS of tension blisters. On the second day of admission, the patient was administered 3.2 million units of penicillin every 6 hours, and isolated and closely observed. The patient improves and is discharged. Traditional bacterial cultures are time-consuming, while mNGS offers the advantage of accurate, quick, high-throughput, unbiased sequencing of all genetic material in a sample, which is a good technical tool for assisting in the diagnosis of rare pathogen infections.

Human Exposure to Naturally Occurring Bacillus anthracis in the Kars Region of Eastern Türkiye.

Environmental contamination with Bacillus anthracis spores poses uncertain threats to human health. We undertook a study to determine whether inhabitants of the anthrax-endemic region of Kars in eastern Türkiye could develop immune responses to anthrax toxins without recognised clinical infection. We measured anti-PA and anti-LF IgG antibody concentrations by ELISA in serum from 279 volunteers, 105 of whom had previously diagnosed anthrax infection (100 cutaneous, 5 gastrointestinal). Of the 174 without history of infection, 72 had prior contact with anthrax-contaminated material. Individuals were classified according to demographic parameters, daily working environment, and residence type. All villages in this study had recorded previous animal or human anthrax cases. Stepwise regression analyses showed that prior clinical infection correlated strongly with concentrations at the upper end of the ranges observed for both antibodies. For anti-PA, being a butcher and duration of continuous exposure risk correlated with high concentrations, while being a veterinarian or shepherd, time since infection, and town residence correlated with low concentrations. For anti-LF, village residence correlated with high concentrations, while infection limited to fingers or thumbs correlated with low concentrations. Linear discriminant analysis identified antibody concentration profiles associated with known prior infection. Profiles least typical of prior infection were observed in urban dwellers with known previous infection and in veterinarians without history of infection. Four individuals without history of infection (two butchers, two rural dwellers) had profiles suggesting unrecognised prior infection. Healthy humans therefore appear able to tolerate low-level exposure to environmental B. anthracis spores without ill effect, but it remains to be determined whether this exposure is protective. These findings have implications for authorities tasked with reducing the risk posed to human health by spore-contaminated materials and environments.

Impact of traditional cutaneous scarification on anthrax lesions: A series of cases from Cubal, Angola

ObjectivesBacillus anthracis infection is a worldwide zoonosis that affects the most vulnerable population and has a high mortality rate without treatment, especially in non-cutaneous presentations. Cutaneous scarification is still common in some regions of the world for the treatment of certain diseases as part of traditional medicine. We describe a series of cutaneus anthrax from a rural setting in Angola where cutaneus scarification is common. Case presentationThis is a retrospective observational study describing a series of cutaneous anthrax cases from Cubal (Angola), many of whom were treated with skin scarification before admission. A total of 26 cases were diagnosed from January 2010 to December 2018. None of the cases were confirmed and eight (30.8%) were probable cases according to the Centers for the Disease Control and Prevention anthrax case definition. The median age was 11 (4.7-30.5) years, 17 (65.4%) had lesions on the head, face, or neck and 15 (57.7%) were treated with cutaneous scarification. Nine (34.6%) patients died. Traditional cutaneous scarification was significantly associated with cutaneous superinfection, respiratory, systemic involvement, and death. ConclusionOur case series points to increased complications and worse outcome of cutaneous anthrax disease if treated with skin scarification.

Suspected human anthrax outbreak investigation in a tribal village of Koraput, India, 2021

AbstractBackgroundOdisha is a state in India endemic to anthrax disease with frequent reports of suspected animal cases. A suspected outbreak of anthrax in humans was reported on 24 October 2021 at Tukum village in Koraput district of Odisha, India after a bullock was found dead and consumed by the locals on 17 October 2021.MethodsThis extended outbreak investigation was carried out through house‐to‐house active surveillance from 24 October to 2 November 2021 in the Koraput district. Eschar skin swabs from wounds were collected and processed at District Public Health Laboratory, Koraput, and analyzed in Indian Council of Medical Research‐Regional Medical Research Centre, Bhubaneswar for molecular confirmation. Samples from bone, soil, and dried meat were collected from the contaminated sites and were transported to Animal Diseases Research Institute, Cuttack for confirmation.ResultsFour suspected cases of human anthrax were identified who had handled and consumed dead bullock meat, among which one human had died later. The attack rate of the persons at risk in the village was calculated to be 1.23%. However, no Bacillus anthracis were identified in human swab samples when tested in real‐time polymerase chain reaction. Samples collected from contaminated sites were confirmed to have anthrax bacilli.ConclusionInvestigation revealed that a suspected anthrax cluster outbreak was due to butchering/de‐skinning and consumption of the anthrax‐infected dead animal. The presence of bacilli in human samples could not be confirmed due to the intake of antibiotics before the collection of sample. This finding highlighted the importance of sample collection at a suitable time and a possible need for one health approach for better coordination among the different responsible departments.

Human anthrax outbreak and associated factors in the horrific siege of Tigray, Ethiopia

ObjectivesTo investigate the magnitude of the anthrax outbreak and its associated factors during the war and the de facto siege of Tigray, Ethiopia. Design or methodsA case-control study design was applied after an initial descriptive cross-sectional study. Multiple logistic regression was used to identify factors associated with the outbreak. ResultsA total of 339 participants (113 cases and 226 controls) were enrolled with a mean age of 22 ( ± 17) and 35 ( ± 16) years for cases and control groups, respectively. Human anthrax attack and case fatality rates in selected districts of Tigray were estimated at 42.3 per 100,000 population and 5.4%, respectively. Cutaneous anthrax was identified as the most common case of anthrax, accounting for 141/149 total cases (94.6%). Age, consumption of raw meat of diseased animals, sharing of meat, presence of a diseased person among household members, disposal of diseased/dead animals, and contact with products of diseased/dead animals were associated with the outbreak. ConclusionA high rate of human anthrax attacks and fatal cases was recorded during the Tigray defacto blockade, with an epidemic curve. The defacto blockade of Tigray complicated the investigation and management of the outbreak.

Investigation of human anthrax outbreak in Koraput district of Odisha, India

BackgroundAnthrax is a zoonotic infection resulting from the bacteria Bacillus anthracis. Humans contract cutaneous anthrax by coming into contact, and gastrointestinal (GI) anthrax by consumption of infected animals or animal products. An outbreak investigation was conducted to confirm the occurrence of the anthrax outbreak, comprehend its extent, understand the epidemiological characteristics, identify the outbreak's cause, and propose control measures. MethodsA descriptive epidemiology was carried out for this outbreak investigation. We defined a suspected human cutaneous anthrax case as appearance of skin lesions and symptoms (itching/redness/swelling) and a suspected case of GI anthrax as appearance of diarrhoea/abdominal pain/vomiting in a resident of Koraput district after being associated with slaughtering and/or consumption of carcass during 5th April to 15th May 2023. The etiological hypothesis was formulated using descriptive epidemiological methods. Laboratory confirmation was performed by real-time polymerase chain reaction (RT-PCR). Statistical analyses were conducted using SPSS 25. ResultsA total of 47 clinically suspected anthrax cases were identified during the outbreak in five villages of Koraput district in Odisha. The epidemic curve indicated multiple point-source exposures starting from 13th April 2023. About 10 cases were identified by RT-PCR testing as confirmed cases of anthrax. No death was recorded in this outbreak investigation. ConclusionsBased on a thorough examination of epidemiological survey results and laboratory findings, we conclude that the outbreak was of human cutaneous and GI anthrax. Exposures from handling dead animals were associated with cutaneous anthrax, whereas eating uncooked meat of dead sheep was associated with gastrointestinal anthrax.

Orphanic diseases. Literature review and clinical cases of anthrax in adult and the child

Orphan diseases are rare diseases that affect a small part of the population. Anthrax is an acute saprozoonotic infectious disease with a predominantly contact mechanism of pathogen transmission. It belongs to the group of especially dangerous infections.The article presents clinical cases of anthrax in adults and children.This clinical observation in an adult patient caused diagnostic difficulties in the initial period of the disease. Then it manifested itself as a severe variant of anthrax, a secondary generalized form, with progressive severe systemic disorders and had an unfavorable outcome.The contact child had anthrax, carbuncle variant of the skin form, of moderate severity, uncomplicated course with a favorable outcome – recovery.

Invisible Warfare: The Psychological Impact of Biological Weapons in the Context of International Humanitarian Law

This study investigates the historical and modern use of biological weapons as effective psychological warfare tools, delving into the motivations for their use as well as the catastrophic psychological effects they cause. The paper also examines examples such as Japan's use of biological weapons during World War II and the 2001 Anthrax attacks in the United States to highlight the profound psychological consequences of using biological agents in warfare. Despite their classification as weapons of mass destruction, compliance with International Humanitarian Law remains a major concern. Further, the author emphasizes humans' inherent psychological vulnerability to biological weapons threats, revealing how the fear of invisible, contagious, and potentially lethal agents can cause widespread anxiety, paranoia, and social disruption. The study uses the recent COVID-19 pandemic as a case study to highlight the effect that such threats have on an adversary's resolve and morale. It also looks into the past use of fear-mongering to win over the public to unwarranted military actions, like the "shock and awe" attack on Iraq. In summary, the paper advocates for global collaboration and awareness to prevent biological weapons from being used in psychological warfare. It calls attention to the grave dangers such acts pose to global peace and security, as well as their profound and potentially irreversible psychological effects.

Variation in herbivore space use: comparing two savanna ecosystems with different anthrax outbreak patterns in southern Africa

BackgroundThe distribution of resources can affect animal range sizes, which in turn may alter infectious disease dynamics in heterogenous environments. The risk of pathogen exposure or the spatial extent of outbreaks may vary with host range size. This study examined the range sizes of herbivorous anthrax host species in two ecosystems and relationships between spatial movement behavior and patterns of disease outbreaks for a multi-host environmentally transmitted pathogen.MethodsWe examined range sizes for seven host species and the spatial extent of anthrax outbreaks in Etosha National Park, Namibia and Kruger National Park, South Africa, where the main host species and outbreak sizes differ. We evaluated host range sizes using the local convex hull method at different temporal scales, within-individual temporal range overlap, and relationships between ranging behavior and species contributions to anthrax cases in each park. We estimated the spatial extent of annual anthrax mortalities and evaluated whether the extent was correlated with case numbers of a given host species.ResultsRange size differences among species were not linearly related to anthrax case numbers. In Kruger the main host species had small range sizes and high range overlap, which may heighten exposure when outbreaks occur within their ranges. However, different patterns were observed in Etosha, where the main host species had large range sizes and relatively little overlap. The spatial extent of anthrax mortalities was similar between parks but less variable in Etosha than Kruger. In Kruger outbreaks varied from small local clusters to large areas and the spatial extent correlated with case numbers and species affected. Secondary host species contributed relatively few cases to outbreaks; however, for these species with large range sizes, case numbers positively correlated with outbreak extent.ConclusionsOur results provide new information on the spatiotemporal structuring of ranging movements of anthrax host species in two ecosystems. The results linking anthrax dynamics to host space use are correlative, yet suggest that, though partial and proximate, host range size and overlap may be contributing factors in outbreak characteristics for environmentally transmitted pathogens.

Analysis of the Situation on Anthrax in the World in 2022, the Forecast for the Russian Federation for 2023

The paper provides the results of analysis of the epizootiological and epidemiological situation on anthrax in the world in 2022, also, the forecast of incidence rates for the Russian Federation in 2023 is presented. In 2022, two cases of anthrax in farm animals and two cases of cutaneous form of infection in humans were registered in Russia, in the constituent entities of the North Caucasian Federal District: the Republic of Dagestan and the Stavropol Territory. The tense situation on anthrax was reported in the neighboring countries: Azerbaijan, Georgia, Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan, and Ukraine. Epizootics of infection with the highest number of affected farm and wild animals were recorded in the countries of Africa, Asia, North America and Europe. The incidence of anthrax among people in the far abroad (mainly in Africa and Asia) was mostly associated with consuming the meat of sick and fallen farm animals, contact with infected animals, animal products. The incidence of anthrax in animals and humans in the Russian Federation in 2023 will largely depend on the scale of coverage with specific immunization of susceptible animals and persons at risk of infection and, given the strict implementation of comprehensive surveillance measures, will be limited to the registration of potentially possible single cases of infection.

Retrospective Analysis of Official Data on Anthrax in Europe with a Special Reference to Ukraine.

Anthrax is an acute infectious zoonotic disease caused by Bacillus anthracis that mostly affects grazing livestock and wildlife. Furthermore, B. anthracis is considered one of the most important biological agents of bioterrorism that could also be potentially misused in biological weapons. The distribution of anthrax in domestic animals and wildlife in Europe with a particular focus on Ukraine as a country of war was analyzed. Between 2005 and 2022, 267 anthrax cases were registered at the World Organization of Animal Health (WOAH) in animals in Europe, including 251 cases in domestic animals and 16 in wildlife. The highest numbers of cases were recorded in 2005 and 2016 followed by 2008, and the highest numbers of registered cases were reported from Albania, Russia, and Italy. In Ukraine, anthrax is currently a sporadic infection. Since 2007, 28 notifications were registered, with isolates mainly from soil samples. The highest number of confirmed anthrax cases was registered in 2018, and Odesa, which is close to Moldova, had the highest number of cases, followed by the Cherkasy region. The presence of thousands of biothermal pits and burial grounds of fallen cattle nationwide favors the re-emergence of new foci. Most confirmed cases were in cattle; however, single cases were confirmed in dogs, horses, and pigs. Further investigation of the disease in wildlife and in environmental samples is needed. The genetic analysis of isolates, investigation of susceptibility to antimicrobial compounds, and determination of virulence and pathogenicity factors are required in this volatile region of the world for awareness raising and preparedness.

Mapping and Analysis of Anthrax Cases in Humans and Animals

Anthrax is a rare but severe disease caused by the gram-positive, rod-shaped bacterium Bacillus anthracis, a toxin-producing, encapsulated, facultative anaerobic organism. Anthrax occurs naturally in the soil and mainly affects livestock and wildlife. It can cause severe diseases in both humans and animals. Anthrax, an often-fatal animal disease, is spread to humans through contact with infected animals or their products. People become infected with anthrax when the spores enter the body. The study aims to localise and monitor anthrax on geographic maps and identify geographic variables significantly associated with environmental risk factors for anthrax recurrence in Georgia (Caucasus), as the geographic environment affects specific diseases, for example, soil and climate, etc. We carefully analysed 1,664 cases in humans and 621 in animals, up to 1,430 locations of anthrax foci in soil (animal burials, slaughterhouses, BP roads, construction, etc.). We analysed more than 30 geographic variables such as climate, topography, soil (soil type, chemical composition, acidity), landscape, etc. We have created several digital thematic maps and foci of anthrax distribution and detection. The discovered variable will help to monitor the foci of anthrax development.

Fix the backlash against public health

Societies generally have reacted to deadly epidemics by strengthening health systems, including laws. Under American federalism (the constitutional division of power between states and the federal government), individual states hold primary public health powers. State legislatures have historically granted health officials wide-ranging authority. After the anthrax attacks in the United States in 2001, the US Centers for Disease Control and Prevention (CDC) supported the Model State Emergency Health Powers Act, which granted public health officials even more expansive powers to declare a health emergency and respond swiftly. But all that ended with COVID-19, as state legislatures and courts gutted this authority. The next pandemic could be far deadlier than COVID-19, but when the public looks to federal and state governments to protect them, they may find that health officials have their hands tied behind their backs.

Case-control study of human anthrax outbreak investigation in farta woreda, South Gondar, Northwest Ethiopia

BackgroundAnthrax is a zoonotic disease caused by the Bacillus anthracis bacteria, which is one of the top five important livestock diseases and the second top priority zoonotic disease, next to rabies, in Ethiopia, which remains a major problem for animals and public health in Ethiopia. This study was conducted to verify the existence of the outbreak, determine risk factors, and implement measures to control the anthrax outbreak in Farta woreda, South Gondar zone, Northwest Ethiopia in 2019.MethodsA community-based case-control study was conducted from March 25 to April 1, 2019. A structured questionnaire was used to collect data and for review of documents and discussion with livestock and health office staff. The collected data were analyzed by SPSS and presented in tables and graphs.ResultsA total of 20 human anthrax cases with an attack rate of 2.5 per 1000 population were reported from the affected kebele. The age of the cases ranged from 1 month to 65 years (median age = 37.5 years). Of the total cases, 66.7% were male and 77.8% were 15 and older. The probability of developing anthrax among people who had unvaccinated animals was higher than in those who didn’t have unvaccinated animals with an AOR = 8.113 (95% CI 1.685–39.056) and the probability of getting anthrax in relation to people’s awareness of anthrax was AOR = 0.114 (95% CI 0.025–0.524).ConclusionAn anthrax outbreak occurred in Wawa Mengera Kebele of Farta woreda. The presence of unvaccinated animals in a household was found to be a risk factor for anthrax cases. Timely animal vaccination and strengthening health education on the vaccination of animals, mode of transmission, and disposal of dead animals are essential for preventing anthrax cases.